Review Materials 2

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Question #1

Helen scored in the 85th percentile of the IQ test. What was her raw score? M=100 s=15

A -1.04

B 1.04

C 115.6

D Neither option is correct

Question #2

Eric scored 107 on the IQ test. What is his exact percentile rank? M=100 s=15

A 68.08%

B 34.14%

C Neither option is correct

D 0.47%

Question #3

Which column should we use if we want to figure out the percentage of cases that falls above a positive z-score?

A B

B C

C A

Question #4

Which column should we use if we want to figure out the percentage of the cases that falls below a positive z score?

A B

B A

C C

Question #5

Using the simplified version of the normal distribution, what percentage of the cases falls within 2 standard deviations to the left of the mean?

A 34%

B 48%

C 68%

D 96%

Question #6

Raw scores are a better measure than z scores when testing whether Bob is more intelligent than outgoing.

A TRUE

B FALSE

Question #7

Standard scores allows us to compare apples to oranges.

A FALSE

B TRUE

Question #8

Standard scores are also know as: (Select all that apply),,

A z score

B Neither answer is correct

C standard deviation

D raw scores

Question #9

A clinical psychologist took a sample of four people from the population of people with anxiety disorders and gave them an interval-level anxiety scale. Their score were 57, 60, 67, and 68 with a mean of 63.00. What is s?

A 4.64

B 21

C 28.67

D 5.35

Question #10

A 21.5

B 28.67

C 86

D 5.35

Question #11

Which of the following variability measures is inclusive of all cases? There may be more than one answer. Select all that apply.,,

A Sample variance

B IQR

C Population variance

D Range

Question #12

Below are the glucose levels of one patient for 21 consecutive days. 174, 142, 131, 145, 175, 150, 176, 151, 110, 162, 133, 163, 135, 178, 178, 154, 166, 146, 156, 167, 93. Using the IQR, determine if there are any outliers. If so, which are they?

A 218

B 93

C 178

D No outliers

Question #13

In a normal distribution, the ___________ focuses on 50% of the cases instead of the highest and lowest scores.

A Range

B IQR

C Percentiles

D Outliers

Question #14

Here are the weights (in pounds) of 20 teens on an experimental food diet. 174, 142, 131, 145, 175, 150, 176, 151, 110, 162, 133, 163, 135, 178, 178, 154, 166, 146, 156, 167. What is the mode of the data? There is more than one correct answer. Select all that apply.,,

A Bimodal

B 110, 178

C 178

D Unimodal

Question #15

A 154.6

B 155

C 140

D None of the above

Question #16

A 154.6

B 155

C 140

D None of the above

Question #17

If data set 1 has more variability than data set 2, it is impossible to have the exact central tendency.

A TRUE

B FALSE

Question #18

Which of the following is most influenced by outliers?

A Mode

B Mean

C Central Tendency

D Median

Question #19

Which of the following would describe a die that is rolled 300 times and gets an equal number of 2 and 4.

A normal distribution

B leptokurtic

C bimodal

D positively skewed

Question #20

Classify the following variable as categorical or quantitative, and discrete or continuous. Time it takes police to respond to 9-1-1 call

A categorical

B categorical, continuous

C quantitative, discrete

D quantitate, continuous

Question #21

Classify the following variable as categorical or quantitative, and discrete or continuous. Political preference

A categorical

B quantitative, continuous

C quantitative, discrete

D categorical, continuous

Question #22

You figured out you will need 5 intervals. Now you calculate for interval width and you get a 7.235. What is your interval width?

A 7.235

B 7

C 8

D 7.24

Question #23

The 2k rule helps us determine:

A sample size

B interval width

C whether to make it grouped or ungrouped

D number of intervals

Question #24

Which of the following determines whether to use grouped or ungrouped frequency distributions?

A value range

B The 2k rule

C Sample size

D The midpoint

Question #25

Which of the following must be included in a frequency distribution? Mark ALL the answers you think are correct.

A Title

B “Upside-down” table

C Columns labeled

D All are correct

E Sample size

Question #26

Which of the following is used when we need to account for each individual value in a set of data?

A Grouped Frequency Distribution

B Ungrouped Frequency Distribution

C Cumulative Frequency

D Frequency Distribution

Question #27

A researcher is investigating whether sugar consumption is associated with number of truancies in high school students. In this study, the cases are:

A number of truancies

B researcher

C sugar consumption

D high school students

Question #28

A researcher is investigating whether sugar consumption is associated with number of truancies in high school students. In this study, the PV is:

A sugar consumption

B high school students

C Researcher

D truancies

Question #29

In which design are cases classified into groups based on characteristics they already possess?

A Correlational

B Statistical

C Quasi-Experimental

D Experimental

Question #30

In an experimental design, which variable is manipulated by the experimenter?

A Response Variable

B Predictor Variable

C Dependent Variable

D Independent Variable

Question #31

Use the APA rounding rules to round the following final results: 189.9953

A 189.98

B 190

C 189.9953

D 189

Question #32

Using this data set: 13,18, and 11, find the following: ∑(X－14)

A 614

B 42

C 600

D 0

Question #33

Using this data set: 8, 9, 5, 4 ,7, and 8, find the following: ∑X²

A 40

B 299

C 41

D 333

Question #34

Determine what type of study is being done: correlational, experimental, or quasi-experimental. A consumer behavior researcher is curious as to whether, in terms of the monetary value of Christmas presents received, it makes a difference if a child is naughty or nice. She has parents classify their children as naughty or nice, then calculates how much the parents spent on Christmas presents for the two different groups of children.

A correlational

B experimental

C quasi-experimental

D All of the above

Question #35

Statisticians are mostly interested in learning about the _________.

A participants

B averages

C population

D sample

Question #36

A researcher is investigating whether sugar consumption is associated with number of truancies in high school students. In this study, the cases are:

A sugar consumption

B high school students

C researcher

D number of truancies

Question #37

A researcher is investigating whether sugar consumption is associated with number of truancies in high school students. In this study, the PV is:

A Researcher

B sugar consumption

C high school students

D truancies

Question #38

In which design are cases classified into groups based on characteristics they already possess?

A Quasi-Experimental

B Correlational

C Experimental

D Statistical

Question #39

In an experimental design, which variable is manipulated by the experimenter?

A Response Variable

B Dependent Variable

C Predictor Variable

D Independent Variable

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