Quant I Quiz! #2 F21

Question 1

Inferential statistics makes estimates of a population using which of the following?

Accepted Answer

a sample

Question 2

You have a group of people complete two measures. Someone who scores above the mean on both would have...

Accepted Answer

a positive ZxZy value

Question 3

Which of the following was developed for Guinness beer to help investigate quality control?

Accepted Answer

student's t-test

Question 4

A perfect positive correlation would have a correlation of...

Accepted Answer

1.0

Question 5

What is the null hypothesis for a two sample t-test?

Accepted Answer

That there are no differences between the means of the two groups

Question 6

What is the standard deviation for the following numbers: 444444444444444

Accepted Answer

0

Question 7

If you had identical twins you could use which of the following t-tests

Accepted Answer

matched t-test

Question 8

We reject the null when a critical value...

Accepted Answer

meets or exceeds the critical value

Question 9

Which of the following led to senate hearings and federal guidelines for ethical procedures?

Accepted Answer

Tuskegee Experiment

Question 10

Which of the following could Clever Hans do?

Accepted Answer

detect subtle body movements

Question 11

Which of the following t-tests would involve randomly assigning people to two different groups?

Accepted Answer

two sample t-test

Question 12

A perfect curvilinear relationship (e.g., upside down U shape) would have what strength of correlation?

Accepted Answer

0

Question 13

In a two sample t-test, conceptually, what do you want to happen to the two distributions for these groups?

Accepted Answer

You want them to drift further and further apart

Question 14

Ice cream is correlated with violence. What likely accounts for this?

Accepted Answer

third variables that were not measured; e.g., hot weather

Question 15

Who did better on a test... someone with a Z score of 0, 1, 1.25, or -2.0?

Accepted Answer

1.25

Question 16

Removing an outlier will do what to the strength of the relationship of a correlation?

Accepted Answer

increase the magnitude of the relationship

Question 17

Which of the following t-tests requires that you know the population parameters?

Accepted Answer

one sample t-test

Question 18

In the social sciences, we reject the null hypothesis....

Accepted Answer

when the probability is at or below .05

Question 19

Reliability regards...

Accepted Answer

how consistent an instrument is over time

Question 20

Sarah runs a two sample t-test and has a probability of .09. Should she reject the null hypothesis?

Accepted Answer

No, not typically

Question 21

I hope you do well on the exam! Truly I do

Accepted Answer

I truly hope you do well on the exam (pick me!)

Question 22

Have a great break!

Accepted Answer

Yes

Question 23

Validity regards the following...

Accepted Answer

whether the instrument measures what you think it is actually measuring

Question 24

Which of the following has the same mean, median, and mode?

Accepted Answer

normal distribution

Question 25

Joe has a Z score of 1.25; Mary has a Z score of .25. Whose score happens more frequently?

Accepted Answer

Mary

Question 26

A 95% confidence interval would leave what percentage in the righthand side tail of the distribution?

Accepted Answer

2.5%

Question 27

What percentage of people are above a Z score of 0?

Accepted Answer

50%

Question 28

Z scores have a mean of _____ and a standard deviation of ______?

Accepted Answer

Mean = 1; SD = 0

Question 29

Correlation is not ______________

Accepted Answer

causation

Question 30

A correlation examines which of the following?

Accepted Answer

the linear relationship between two variables

Quant I Quiz! #2 F21

Questions 30

Quant I Quiz! #2 F21

Questions 30