Independent samples t-test One sample t-test Paired samples t-test ANOVA Kruskal
ID: 3272064 • Letter: I
Question
Independent samples t-test
One sample t-test
Paired samples t-test
ANOVA
Kruskal Wallis Test
Signed Rank Test Rank
Sum Test Chi-Square Test
Fisher Exact Test
Linear regression
Shapiro-Wilke Test
1. You want to test if a medication lowers cholesterol. You sampled 32 subjects, and obtained their cholesterol levels at baseline, and then again after 4 weeks on medication.
2. Annual salary information was collected from doctors from 4 specialities- 5 radiologists, 6 cardiologists, 7 neurologists, and 4 oncologists. How would you test if there was a difference in salary among the specialities?
3. Daily caloric intake was sampled on 45 people. What test would you use to see if the data is normally distributed?
4. SAT scores were sampled in 131 students. You believe the students scored higher than the national average of 1020. What test would you use?
5. Data is collected on daily exercise (in minutes) and weight. You want to test if there is a relationship between the two variables, and more specifically, to quantify this relationship. What test would you use?
Explanation / Answer
Ans:
1)You want to test if a medication lowers cholesterol. You sampled 32 subjects, and obtained their cholesterol levels at baseline, and then again after 4 weeks on medication.
Dependent samples,hence paired Sample t test will be used
2). Annual salary information was collected from doctors from 4 specialities- 5 radiologists, 6 cardiologists, 7 neurologists, and 4 oncologists. How would you test if there was a difference in salary among the specialities
ANOVA will be used,as we will be testing mean salary of all groups are equal or not.
3)Daily caloric intake was sampled on 45 people. What test would you use to see if the data is normally distributed
The Shapiro-Wilk test for normality is available when using the Distribution platform to examine a continuous variable. The null hypothesis for this test is that the data are normally distributed. The Prob < W value listed in the output is the p-value.
4) SAT scores were sampled in 131 students. You believe the students scored higher than the national average of 1020. What test would you use
One sample t-test
5) Data is collected on daily exercise (in minutes) and weight. You want to test if there is a relationship between the two variables, and more specifically, to quantify this relationship. What test would you use
Linear Regression(to quantify the relationship)
(Note :Chi square test of independence is used only to check whether variables are independent or dependent)