Answer the questions using multiple choice

A researcher was interested in how many hours on average ER doctors sleep per week. He collected data from ER doctors at a local hospital and obtained the following results: 59, 32, 34, 51, 40, 52, 60, 61, 40, 43, 30, 31, 31, 44, 42. Make a grouped frequency table using intervals from 30-34, 35-39, etc., and then make a histogram based on the grouped frequency table. How would you describe the distribution?

Group of answer choices

Normal

Unimodal

Rectangular

Bimodal

The latest test scores in class are as follows: 98, 68, 100, 98, 95, 95, 90, 96, 62, 100, 96, 98. Make a frequency table and then make a histogram based on that frequency table. What is the shape of the distribution?

Group of answer choices

Symmetrical

Negatively skewed

Normal

Positively skewed

A car salesman collected data on how many cars were sold at a dealership per day for two weeks. The results were as follows: 2, 1, 4, 5, 7, 6, 2, 2, 2, 1, 4, 4. Make a frequency table and then make a histogram based on that frequency table. What is the shape of the distribution?

Group of answer choices

Skewed to the right

Skewed to the left

Bimodal

Symmetrical

Positively skewed distributions are also known to be:

Group of answer choices

negatively skewed

normal

skewed left

skewed right

(Fill in blank)

If an ordinary frequency table would end up looking too crowded, a researcher could make a:

____

An example of a rectangular distribution is:

Group of answer choices

the number of adults of various ages (20- to 40-yrs-old) in an office

the number of children at each grade level at an elementary school (assuming approximately the same amount of children per grade)

a distribution with few scores on the low end and many scores on the high end

the number of toddlers of various ages (2- to 4-yrs-old) in a play area

A researcher collects data on how satisfied customers are with a particular store. Results show that the majority of customers rate their satisfaction as 7 (on a scale from 1 to 10). The distribution of this data would be described as:

Group of answer choices

unimodal

normal

rectangular

bimodal

A parent tracks how many times per week their child does homework. The number of times their child does homework is a:

Group of answer choices

continuous variable

discrete variable

nominal variable

The following numbers are valid possible answers to a question: 1, 2, 3, 4, 5. Each of these numbers are considered a:

Group of answer choices

value

mean

frequency

variable

A distribution of students' ages is mostly made up of the ages from students who generally belong to only two age groups. The shape of this distribution of students' ages is:

Group of answer choices

bimodal

unimodal

negatively skewed

skewed to the right

Among the options listed below, which one is an example of an ordinal variable?

Group of answer choices

Weight (125.4, 132.7, 188.9, etc.)

College major (psychology, communication, biology, etc.)

Number of students in a class (20, 15, 30, etc.)

Place finished in a race (first, second, third, etc.)

If prisoners in a correctional facility are only referred to by their assigned numbers, which of the following measurement scales is being used?

Group of answer choices

Ratio

Nominal

Ordinal

Interval

Pretend that a questionnaire contains the item, "Please rate how anxious you are on a scale of 1 to 10." If Bob answers that item with a "7," then "7" is the:

Group of answer choices

continuous variable

score

variable

nominal value

In this type of graph, each bar corresponds to the frequency of a value in the frequency table?

Group of answer choices

Ratio Scale

Frequency table

Unimodal Distribution

Histogram

If a psychologist is conducting a study in which 100 students are asked about their satisfaction with the food in the dining hall and then their responses are generalized to the entire student body, the statistical method used is:

Group of answer choices

descriptive

discrete

ordinal

inferential