Exam 1

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Question #1

Given the following frequency distribution: 1, 8, 16, 2, 6, 2, 7, what is the mean?

A 6.34

B 7.14

C 5.93

D 6

Question #2

Given the following frequency distribution: 1, 8, 16, 2, 6, 2, 7, what is the median?

A 6

B 5

C 4

D 7

Question #3

Given the following frequency distribution: 1, 8, 16, 2, 6, 2, 7, what is the mode?

A 6

B 16

C 2

D 3

Question #4

In a class of 58 students, a survey was taken regarding the type of transportation students used to get to schoool finding that 35 students drove, 18 took public transportation, and 5 walked. What percentage of students did not drive?

A 72.91%

B 10.42%

C 39.66%

D 16.67%

Question #5

A 0.1

B 0.73

C 0.31

D 0.48

Question #6

Which is not a measure of central tendency?

A mean

B mode

C median

D variance

Question #7

If the independent variable is in the rows of a cross-tabulation and the dependent varaible in the columns, which type of percentages do we use for comparisons?

A column

B rows

C total

D any of the above

Question #8

Which of the following is not a requirement of the nominal scale of measurement:

A exhaustiveness

B equal intervals between cases

C mutual exclusivity

D none of the above

Question #9

Which measures of central tendency cannot be applied to nominal data?

A median

B mean

C mode

D both mean and median

Question #10

Deviation refers to:

A the variance between scores

B the difference between the variance and the median

C the number of scores not equal to the mean

D the distance of any score from the mean

Question #11

A distribution with a mean=10, median=12, and mode=14 is said to be:

A bimodal

B positively skewed

C symmetrical

D negatively skewed

Question #12

A distribution with an equal mean, median and mode is said to be:

A unimodal

B symmetrical

C bimodal

D both unimodal and bimodal

Question #13

In a distribution of scores, the middlemost scores is:

A the mode

B the median

C the mean

D the midpoint

Question #14

In a distribution of scores, the score that occurs most frequently is:

A the mean

B the midpoint

C the median

D the mode

Question #15

Which measures of central tendency is/are most appropriate for a skewed distribution?

A the mean

B the mode

C both median and mean

D the median

Question #16

Kurtosis refers to:

A the cummulative frequency of a distribution

B the symmetry of a distribution

C the peakedness of a distribution

D the skewness of distribution

Question #17

Skewness refers to:

A the unequal distribution of extreme scores

B the normal distribution of extreme scores

C the central limit theorem

D all of the above

Question #18

Which type of distribution of final grades would be most desirable to students?

A bimodal

B positively skewed

C negatively skewed

D unimodal

Question #19

Pie charts are particularly useful for what tye of data?

A ordinal

B nominal

C interval

D sequential

Question #20

A researcher interested in testing the impact of listening to classical music while studying on students’ test performance. Group A consists of 25 students who study while listening to classical music prior to taking the exam. Group B studies in silence and then takes the exam. The experimenter mesaures the differencee between the two groups by comparing the test scores of the two groups. The environment in which the participants studied would be the:

A manipulated variable

B dependent variable

C random variable

D independent variable

Question #21

A hypothesis is a(n):

A fundamental unit of scientific observation

B statement of the relationship between two or more variables

C scientific fact or truth

D observable and measureable variable

Question #22

When organizing a frequency table for a variable measured at the ordinal level, how are the categories usually arranged?

A categories should be ordered by frequency

B it does not matter how the categories are ordered

C categories should be ordered just as one measured at the nominal level

D categories chould be ordered from highest to lowest and vice-versa by category

Question #23

Interval measurement is used primarily to:

A classify or categorize data and assign a score

B classify or categorize data

C assign a score

D none of the above

Question #24

Frequency polygons (AKA line charts) are most meaningful for what times(s) of variable?

A interval

B both ordinal and interval

C ordinal

D nominal

Question #25

If participants are asked to identify their political party affiliation and they are given the options of Democrats, or Republicans, what level of measurement would this be?

A not enough information provided

B ordinal

C nominal

D interval

Question #26

If the independent variable is in the columns of a cross-tabulation and the dependent is in the rows, which type of percentages do we use for comparisons?

A Row

B Column

C Total

D Any of the above

Question #27

Ordinal measurement is primarily used to:

A rank order data

B both of the above

C assign a score

D none of the above

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