Biostats Exam 2 Prep Session

Question 1

What does sampling distribution allow us to do?

Accepted Answer

All of the above

Question 2

If you have a large p-value, you will ____ the null.

Accepted Answer

fail to reject

Question 3

How many Standard Deviations is a Confidence Interval of 95% equal to?

Accepted Answer

1.96

Question 4

What is the term used for equal variance?

Accepted Answer

homoscedasticity

Question 5

The characteristics of a sample are called ______.

Accepted Answer

statistics

Question 6

What is a population?

Accepted Answer

Entire collection of individuals or objectives of interests

Question 7

In a test for medication, what would the alternative hypothesis be?

Accepted Answer

Medication affects heart rates

Question 8

The characteristics of population are called _____

Accepted Answer

parameters

Question 9

What must be specified in a normal distribution?

Accepted Answer

mean and standard deviation

Question 10

Which forms can Ha take?

Accepted Answer

All of the above

Question 11

Sampling distribution of sample mean will be normally distributed if sample size exceeds ___.

Accepted Answer

30

Question 12

A probability of 0 indicates that an event will ______ occur.

Accepted Answer

never

Question 13

What is hypothesis testing used for?

Accepted Answer

To decide between two competing claims of pop. parameter

Question 14

What does the Central Limit Theorem state?

Accepted Answer

If sample size sufficiently large, distribution is normal

Question 15

If the size of a given sample is greater than 30, would you use the K-S test, or the S-W test?

Accepted Answer

K-S

Question 16

What are two areas of inferential statistics?

Accepted Answer

Point estimation and interval estimation

Question 17

Which two factors determine location and shape of a sampling distribution curve, respectively?

Accepted Answer

population mean and population standard deviation

Question 18

What is probability?

Accepted Answer

Both 1 and 2

Question 19

Which box represent an Type II error

Accepted Answer

white

Question 20

As the sample size increases, the standard deviation of the means _____.

Accepted Answer

decreases

Question 21

In classical probability, the outcome of an event in a chance experiment are _____.

Accepted Answer

equally likely

Question 22

If a class of students traditionally has a ratio of 1:1, what would be null hypothesis?

Accepted Answer

The sex ratio= 1:1

Question 23

As "df" increases, the t-distribution gets further from normal distribution. True or False?

Accepted Answer

False

Question 24

Which normal distribution curve would represent μ=120, sigma2 =25. Black, blue, or green?

Accepted Answer

Green

Biostats Exam 2 Prep Session

Questions 24

Biostats Exam 2 Prep Session

Questions 24