JustAnswer



1)Your study examines the effect of exercise on heat disease. The independent variable is:(2pts) Heart Disease Skewed Significant Exercise2)Your test is very good at correctly identifying when a person actually has a disease. This is a measure of:(2pts) specificity effect size collinearity sensitivity3)The results from your study indicate that age is normally distributed with a standard deviation of 2 and a mean age of 22. You expect:(2pts) a significant number of outliers in the right tail 68% of the subjects to be between 22 and 24 95% of the respondents to be between 18 and 26 years old a large age range to be represented4)Your research determines that you have a normal age distribution within your sample population. The mean age is 16 and the standard deviation is two. Your mode is:(2pts) 14-18 18 16 unable to determine5)Your intervention measured blood pressure at the beginning of an office visit on three occasions. Repeating the measurement of this variable gives you more information about the:(2pts) divergent validity stability content validity level of measurement6)You conduct a study in a diabetes awareness class. The two hour post prandial blood glucose levels in the group are normally distributed and have a mean of 126 and a standard deviation of 13. You would expect 95% of your subjects to have a two hour post prandial blood glucose level that is:(2pts) hyperglycemic between 113 and 139 between 100 and 152 between 124 and 1287)You have completed a study examining if footwear affects speed and comfort on an athletic team. Your subjects wear two different kinds of sneakers and you determine how many seconds a forty yard dash takes to complete and if they are comfortable or uncomfortable in their sneakers when they are done. This time is takes to complete the race is what level of measurement?(2pts) Unable to tabulate Ordinal Interval Nominal8)A researcher asks individuals to describe how they feel sitting in the waiting room of a particular medical clinic. This is an example of what type of data.(2pts) Independent Ratio Qualitative Quantitative9)You as your study participants if they smoke or chew tobacco. You then draw a serum level of one of the byproducts of nicotine. This lab test can help confirm which aspect of your original study question?(2pts) Dispersion Validity Stability Standard deviation10)You have completed a study examining if footwear affects speed and comfort on an athletic team. Your subjects wear two different kinds of sneakers and you determine how many seconds a forty yard dash takes to complete and if they are comfortable or uncomfortable in their sneakers when they are done. The level of measurement for your independent variable is?(2pts) Ratio Ordinal Interval Nominal11)A researcher is measuring how many times a minute individuals cough when exposed to cigarette smoke. What measure of central tendency is appropriate for this data?(2pts) Mean Median Mode any of these measures is appropriate12)You design a study to examine the relationship between pain, stress and blood pressure. If your null hypothesis is that pain and stress are not associated with blood pressure, then your dependent variable is:(2pts) Pain Blood pressure Stress In your alternative hypothesis13)You are teaching a nursing class with twenty students. Half the class scored a 75% on the exam, five earn an 85%, three earn a 90% and two earn a 95%. The mode is:(2pts) 85% 75% 80% 90%14)A study of 30 men was completed and ten watched three hours of television a day, ten watched two hours of television a day, three watched one hour of television a day and seven did not watch television. What was the cumulative percentage of men who watched less than two hours of television a day?(2pts) 77% 33% 66% 88%15)A study polled forty new mothers who attempted to nurse their infants from birth to 6 weeks. Thirty-six of the subjects polled successfully nursed their infants the full six weeks. Four of the new mothers reported levels of pain and frustration high enough to switch their infants to formula. What was the percentage of new mothers who persisted with breastfeeding through the full six weeks?(2pts) 75% 10% 90% 36%16)You have completed a study examining if footwear affects speed and comfort on an athletic team. Your subjects wear two different kinds of sneakers and you determine how many seconds a forty yard dash takes to complete and if they are comfortable or uncomfortable in their sneakers when they are done. The athletic team you are studying is your?(2pts) Population Sample Randomized sample Generalized population17)In your study of forty people, 8 patients had no cold symptoms, 12 people had mild cold symptoms, 9 had moderate cold symptoms and 10 had severe cold symptoms. One person did not respond. What percent of patients reported no cold symptoms?(2pts) 30% 40% 8% 20%18)Your study finds no relationship between smoking and lung cancer because you did not enroll enough participants. Smoking is associated with lung cancer. The reason you didn’t find it was because you didn’t have:(2pts) adequate power generalizability validity reliability19)If the sixty percent of the adult population between 40 and 60 are women, a representative sample should be:(2pts) mixed 60% male 40% female 40% male 60% female 50% male 50% female20)Your study states amino acid supplementation is associated with increased blood pressure when it actually is not. This is an example of:(2pts) type two error large effect size inadequate power type one error21)If your sample size is small you:(2pts) have a greater chance of type II error have a greater chance of type I error are able to draw conclusions regarding your data easier may find a statistical difference that really isn’t there22)A study of alcohol consumption and liver failure has an alpha of 0.05, and a beta of 0.80 and a Chi square value of 3.45 with a p value of 0.06. What do you conclude?(2pts) Your sample size was too large There is no evidence of a relationship between alcohol consumption and liver failure a type I error was made Alcohol consumption increases liver failure23)Your study reports that individuals wearing pink shirts are significantly more likely to get hit by a car when in fact this is not true. This is an example of:(2pts) a type II error a nonrepresentative sample inadequate sample size a type I error24)All of the following are true about type 2 errors EXCEPT:(2pts) you accept the null incorrectly you reject the null incorrectly your sample size may not be big enough you miss a relationship that does exist25)You administer your survey regarding eating habits of nurses to all the nurses who are in the cafeteria at lunchtime on a particular day. This is an example of what type of sample?(2pts) randomized cluster sampling probability sampling quota sampling convenience sampling26)In order to calculate the necessary sample size for your study you will need to know:(2pts) the alpha the power the effect size All of the above27)You are conducting a study regarding the effect of psychotrophic drug use on investment habits and your well constructed power analysis indicates you will need a sample of 100 subjects to detect a statistical difference. You anticipate a high nonresponse rate, therefore you should enroll:(2pts) less than 100 subjects exactly 100 subjects as many subjects as you can afford more than 100 subjects28)If the observed difference between samples is large enough to reflect a difference between populations you should:(2pts) reject the null hypothesis repeat the statistical test fail to reject the null hypothesis be concerned about a type II error29)Your study reports that individuals walking at lunchtime are significantly more likely to eat vegetables when in fact this is not true. This is an example of:(2pts) inadequate power type two error type one error a nonrepresentative sample30)Your study sample is randomly collected and you are examining the association between dropping out of high school and enrolling in a GED program. You determine that only two of the students who dropped out of high school did not enroll in a GED program. The appropriate test to use to study this association would be:(2pts) Yates continuity correction Chi-Square Fisher Exact test McNemar test31)The sample criteria:(2pts) are always theoretical determine the target population eliminates the need for exclusion criteria are randomized32)You can have a small sample and a large standard deviation. You know this means:(2pts) You can reject the null hypothesis Your study is not statistically significant You lack homogeneity None of the above33)Your study finds no relationship between smoking and lung cancer because it did not enroll enough participants. Smoking is associated with lung cancer. This is an example of:(2pts) an overpowered study poor sample criteria type two error type one error34)You are developing a new screen for heart disease which is found to correlate (r=0.7) with the “gold standard” blood test for cardiac enzymes. This is an indication of:(2pts) divergent validity convergent validity validity from contrasting groups validity from factor analysis35)The study you are reading reports an odds ratio of 3.27 with 95% confidence limits of (2.99-3.54). You know this means:(2pts) there is a protective effect from this exposure those with the exposure are 95% likely to get the disease the p value is significant you are unable to determine the significance of the odds ratio36)Your study examines knowledge gained from your intervention using an exam score. Your participants complete a pre and post test exam which is graded on a scale of 0-100%. Which type of analysis would be appropriate?(2pts) multicollinearity chi square t-test for dependent groups t-test for independent groups37)You read a study last year that reported ANOVA results with a significant F value when examining the relationship between the average age of transplant patients who were Hispanic, African-American and Asian. A new larger study is conducted which is able to control for other confounding factors and reports ANOVA results with an insignificant F value. The larger study is actually correct. The first study made what type of error?(2pts) underpowered error type I type II type III38)You conduct a study to determine if there is a difference in average number of hours slept each week between husbands and wives. What would be an appropriate test?(2pts) repeat measures t-test t-test for independent groups t-test for dependent groups repeat measures ANOVA39)Which statistic is most appropriate for measuring the strength of the association between an exposure and disease outcome in a case-control study?(2pts) attributable risk in the population relative risk student t-test odds ratio40)Your null hypothesis is that there is no significant difference in the average urine output for post operative surgical patients from Cleveland, Buffalo and Miami. Your ANOVA results include a F value of 4.65 with a p value of 0.0003. You know this means:(2pts) There is a significant difference in the clinical care in the three cities. There is no significant difference. You should fail to reject the null hypothesis. You should reject the null hypothesis.41)You are interested determining the difference in the exercise patterns of college students on athletic teams. You randomly sample ten soccer players and ten hockey players who are in their freshman year of college. If you want to use the t-test you know you must measure exercise patterns at what level?(2pts) interval or ratio ordinal nominal All of the above42)Your study examines knowledge gained from your intervention using an exam score. Your participants complete a pre and post test exam which is graded on a scale of 0-100%. Which type of analysis would be appropriate?(2pts) multicollinearity t-test for independent groups chi square t-test for dependent groups43)You are conducting a study with twenty-five randomly selected participants in a methadone rehabilitation program. You measure the withdrawal index for all the participants at the beginning of the study, after one week of daily guided meditation practice, and then after one week on a new herbal supplement. This study design may be problematic because of:(2pts) recall bias degree's of freedom lack of independence carry-over effects44)In January of 2007, a clinic with 300 previously identified HIV+ patients performs a routine screening and discovers ten additional patients who are HIV+. The incidence of HIV+ patients in this clinic between January and February 2007 is:(2pts) 310 300 10 unable to determine45)You are reading a study which reports a significant correlation (r) between smoking and coffee drinking of 0.8. You know this means:(2pts) when participants smoke more they drink less coffee when participants smoke more they drink more coffee when participants smoke more their coffee drinking is decreased by 75% when participants smoke more they only drink 75% of the coffee they were drinking46)In 2008, your clinic had 438 patients enrolled who tested positive for genital herpes (lifelong viral illness). In January 2009, you detect an additional twelve patients who test positive and four more in the first week of February. What is the prevalence for genital herpes at your clinic in February of 2009?(2pts) 450 16 4 45447)You are studying the relationship between exercise and BMI and find a significant correlation of -0.7. Based on this study, if a person increases her exercise two hours a week you would expect his/her BMI to:(2pts) increase by 0.7 pounds decrease stabilize decrease by 0.7 pounds48)A randomized study compared the average sperm count in men over 45 to the average sperm count in men under 45 at six weeks post-vasectomy. What would be the most appropriate test for this analysis?(2pts) student t-test Spearman’s correlation coefficient chi-square ANOVA49)You are conducting a study which examines racial differences in the number of surgical interventions. Your racial groups are African-American, Caucasian, Latino and Other. Which type of analysis would be the best?(2pts) t-test for dependent groups Chi-Square t-test for independent groups ANOVA50)If you select an alpha of 0.05 and a power of 0.80 for your study and your independent t-test for the difference in the mean serum potassium level of kidney dialysis patients and kidney transplant patients has a p value of 0.02. You know this means:(2pts) There is a significant difference between the two groups. There is a significant difference between the two groups but you did not find it. You did not have enough power to find a difference between the two groups. You need to increase the sample size in your study in order to increase the power. ................
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