Quiz about Statistic

Question 1

The area of a normal distribution is equal to its probability.

Accepted Answer

True

Answer

False

Question 2

Statistics is the math of gathering, describing, and analyzing data.

Accepted Answer

False

Answer

True

Question 3

198 people bought a cake pop from Marcy on her birthday. What is this an example of?

Accepted Answer

Descriptive statistics

Answer

Inferential statistics

Question 4

Which of these statements are qualitative?

Accepted Answer

Rankings of your favorite musician

Answer

Number of cars in a parking lot

Answer

Weight of the can on the windowsill

Answer

The amount of sugar needed for a cake

Question 5

The weight of various toys: 5.6 lbs, 29.8 lbs, 2.3 lbs. What is this an example of?

Accepted Answer

Continuous

Answer

Discrete

Question 6

Data at this level is quantitative and there is no meaningful zero.

Accepted Answer

Interval

Answer

Ratio

Answer

Nominal

Answer

Ordinal

Question 7

A stratified sample is a sample of each member in the group.

Accepted Answer

False

Answer

True

Question 8

Lauren is doing a research project and has to collect data on the growth of pea plants for six weeks. What type of study is this?

Accepted Answer

Longitudinal study

Answer

Cross-sectional study

Answer

Meta-analysis

Answer

Case study

Question 9

Confounding variables are factors of the treatment that cause an effect on the group.

Accepted Answer

False

Answer

True

Question 10

Processing errors are errors that occur from the data being processed.

Accepted Answer

True

Answer

False

Question 11

True or False: A normal distribution is bell-shaped and uniform about its mean.

Accepted Answer

False

Answer

True

Question 12

True or False: A Z-value can be negative.

Accepted Answer

True

Answer

False

Question 13

True or False: When rounding a Z score, you should round to 3 decimal places.

Accepted Answer

False

Answer

True

Question 14

What is a horizontal asymptote?

Accepted Answer

A situtation in which the curve does not cross the X-axis

Answer

The number of standard deviations a value is from 0

Answer

Where the curve meets the X-axis

Answer

The curve only meets one end on the X-axis

Question 15

What does an inflection point indicate?

Accepted Answer

The point where the curve goes upward or downward

Answer

The point where the curve only goes upward

Answer

The point where the curve only goes downward

Answer

The highest point on a normal distribution curve

Question 16

Determine the inflection point(s) on the following graph:

Accepted Answer

B only

Answer

A & C

Answer

D only

Answer

B & C

Question 17

Which of these statements is false?

Accepted Answer

The mode is affected by outliers

Answer

The mean is best used for quantitative data without outliers

Answer

The median does not have to be a data value

Answer

The mode is used for qualitative data

Question 18

The greater the standard deviation, the more the data values are spread out. True or False?

Accepted Answer

True

Answer

False

Question 19

What is the population standard deviation for this data set?
4, 4, 5, 7, 8, 9, 12

Accepted Answer

2.73

Answer

7.43

Answer

8.67

Answer

2.94

Question 20

A ___________ visually shows a five-number summary.

Accepted Answer

Box and whisker plot

Answer

Pie chart

Answer

Histogram

Answer

Ogive

Question 21

The standard deviation is the square root of the variance. True or false?

Accepted Answer

True

Answer

False

Question 22

The second quartile (Q2) represents the mode of the data set. True or false?

Accepted Answer

False

Answer

True

Question 23

Which of the following terms corresponds to the definition below:
A category of data in a frequency distribution

Accepted Answer

Class

Answer

Frequency

Answer

Ordered Array

Answer

Distribution

Question 24

Which of the following terms corresponds to the definition below:
A way to describe the structure of a particular set or population

Accepted Answer

Distribution

Answer

Ordered Array

Answer

Frequency

Answer

Sample Size

Question 25

What is f/n?

Accepted Answer

Relative Frequency

Answer

Cumulative Frequency

Answer

Class Boundary

Answer

Midpoint

Question 26

Use this type of graph when comparing categories of qualitative data in relation to the whole population.

Accepted Answer

Pie Chart

Answer

Pareto Chart

Answer

Bar Graph

Answer

Ogive

Question 27

Which of the following could be used to display cumulative frequencies?

Accepted Answer

None of the other options

Answer

Pareto Chart

Answer

Bar Graph

Answer

Histogram

Question 28

What is the mode of the following data set?

Accepted Answer

None of the options are correct

Answer

4 and 32

Answer

32 and 57

Answer

27 and 57

Question 29

If you were finding the area to the left of a z-score of 7.12 with a cumulative normal distribution table, which categories would you look in?

Accepted Answer

7.1 and 0.02

Answer

7.0 and 0.12

Answer

7.0 and 12

Answer

7.1 and 0.2

Question 30

Finding the area between two z-scores requires:

Accepted Answer

Subtraction

Answer

Multiplication

Answer

Division

Question 31

Finding the area to the right of a positive z-score is the same as finding the area to the left of a negative z-score.

Accepted Answer

True

Answer

False

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