U9 Data Analysis

Question 1

A standard normal distribution has a mean of:

Accepted Answer

0

Question 2

The equation \sqrt{\frac{Σ\left(x-\overline{x}\right)^2}{n-1}} is the standard deviation of a:

Accepted Answer

sample

Question 3

Which group has no treatment imposed on it?

Accepted Answer

Control

Question 4

Which of the following is not part of a normal distribution graph:

Accepted Answer

26.3%

Question 5

A normal distribution is based on given:

Accepted Answer

percentages

Question 6

Which is an example of an SRS (simple random sample):

Accepted Answer

Lottery

Question 7

The standard deviation for a sample is:

Accepted Answer

Sx

Question 8

The following formula (\sqrt{\frac{Σ\left(x-\overline{x}\right)^2}{n-1}} ) solves for:

Accepted Answer

standard deviation

Question 9

Standard deviation of a sample is the square root of the:

Accepted Answer

variance

Question 10

The z score table gives probability values __________to the z score.

Accepted Answer

less than or equal to

Question 11

The measure of spread is:

Accepted Answer

variabilty

Question 12

A sample needs to be at least 1000 people:

Accepted Answer

False

Question 13

The mean of a population is:

Accepted Answer

μ

Question 14

312 of the dogs in town were tested.....

Accepted Answer

Sample

Question 15

The sample proportion of getting 46 even numbers after rolling a die 100 times is:

Accepted Answer

\frac{23}{50}

Question 16

.9647 from the z table is equal to:

Accepted Answer

96.47%

Question 17

Good experiments can establish

Accepted Answer

Causation

Question 18

All of the children in the city refers to a:

Accepted Answer

population

Question 19

A parameter describes a:

Accepted Answer

population

Question 20

An SRS is a...

Accepted Answer

Simple Random Sample

Question 21

Important for a reliable study

Accepted Answer

All of the above

Question 22

Normally distributed graphs are:

Accepted Answer

bell curves

Question 23

People volunteer to participate in a study:

Accepted Answer

Self-selected

Question 24

Observational studies can establish causation

Accepted Answer

False

Question 25

The mean of a set of numbers is the:

Accepted Answer

average

Question 26

The values on the z table are:

Accepted Answer

decimals

Question 27

Finding the average income of all households in a major city is a:

Accepted Answer

parameter

Question 28

Which of the following is not part of the definition of statistics:

Accepted Answer

displaying data

Question 29

Which of the following has the greatest variance:

Accepted Answer

10, 9, 9, 8, 8, 7, 7

Question 30

A sample is taken from each group or layer....

Accepted Answer

Stratified

Question 31

A sample is always a good reflection of the population

Accepted Answer

False

Question 32

This formula \frac{x-μ}{σ} is used to find:

Accepted Answer

z scores

U9 Data Analysis

Questions 32

U9 Data Analysis

Questions 32