Capella PSYC4700 Week 2 Quiz Latest 2023

PSYC4700 – Stat for Behavioral Sciences

Week 2 Quiz 1

Question 1

As a general rule, a simple frequency distribution should have between                                               

a. 3 and 6 intervals.

b. 5 and 10 intervals.

c. 8 and 12 intervals.

 d. 5 and 20 intervals.

Question 2

Which of the following is NOT a rule for constructing a simple frequency distribution?                                    

a. The number of intervals should equal the number of values measured.

b. Each interval is equidistant.

c. No class interval overlaps.

d. At least five class intervals are included.

Question 3

A researcher distributes frequencies into the following intervals: 1-10, 11-20, 21-30, 31-40, 41-50, and 51 and above. What is wrong with this frequency distribution?                                               

a. The interval width is too small.

b. The interval width is unequal.

c. The class intervals overlap.

d. One interval is an open class.

Question 4

Grouped data can be distributed                                             

a. as a range of values.

b. with upper and lower boundaries.

c. into intervals.

 d. all of the above.

Question 5

When cumulating frequencies from the bottom up, the data are discussed in terms of                                  

a. at most.

b. less than.

c. at or below.

d. all of these.

Question 6

A psychologist wants to know how many of her clients continue with therapy for at least 12 days. If she constructs a frequency distribution for these data, what type of distribution would be most appropriate to answer her question?                                    

a. a cumulative frequency distribution from the bottom up

 b. a cumulative frequency distribution from the top down

c. a simple frequency distribution

d. a relative frequency distribution

Question 7

The sum of relative frequencies for each interval is ______.                                      

a. 1.00

b. 100%

c. equal to the total number of scores in a distribution

d. both 1.00 and 100%

Question 8

A researcher finds that 12 persons in a sample of 60 reported getting between 4 and 6 hours of sleep per night. What is the relative percentage for this interval?                                     

a. 24%

b. 22%

 c. 20%

d. There is not enough information to answer this question.

Question 9

A percentile is also called a                                         

a. score.

b. range.

c. distribution.

d. percentile point.

Question 10

A researcher finds that 12% of participants make between three and five visits to a physician each year. What are the real limits for this interval?                                  

a. 3-5

 b. 2.5-5.5

c. 2.5-3.5

d. equal to the sum of the products for the previous interval

Question 11

True or False: Bar charts are used to summarize discrete and categorical data.                                   

True

False

Question 12

True or False: A histogram is basically a bar chart in which the bars do not touch.                                               

True

False

Question 13

The ______ is the percentage of scores with values that fall below a specified score in a distribution.    

a. interval

 b. percentile rank

c. relative frequency

d. percentile point

Question 14

A researcher measures the weight (in ounces) of newborn infants in the month of March. What type of graphical display would be most appropriate for summarizing the frequency of infants falling into different intervals of weight?                                 

a. histogram

b. bar chart

c. scatter gram

d. all of the above

Question 15

Bar charts are a lot like histograms, except                                          

a. the bars displayed in the graph do not touch.

b. the bar chart summarizes quantitative data.

c. the bar chart summarizes continuous data.

d. all of these.