1) MCQ

a) A research group would like to conduct a mental health study in a small town to determine the mean number of people who have had mental health issues in their life.The error in estimating the mean is to be less than 25 people with a 95% level of confidence.The research group found a report conducted on the residents of a nearby town that estimated the standard deviation to be 380 people.What is the required sample size?

a.888

b.29

c.887

d.30

b)What type of data is the chai-square goodness-of-fit test best suited for?

a.Ratio

b.Nominal

c.Ordinal

d.Interval

c)If the total observed frequencies are 140, and the expected frequencies are all equal, what is the expected frequency for a group if there are 5 groups?

a.14

b.20

c.28

d.35

d)If there are 20 total observations split into 4 groups, and we want to conduct a chai-square goodness-of-fit test, how many degrees of freedom are there?

a.3

b.20

c.4

d.19