True or False Some distributions have simple shapes, such as unimodal (single pe

Question

True or False
Some distributions have simple shapes, such as unimodal (single peak) or symmetric (one side is the mirror image of the other).

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Identify the following variable as either categorical(qualitative) or quantitative and explain why.

Waiting time at a bus stop (in minutes)

Categorical or qualitative because it is not a measurement or a count

Quantitative because it consists of a measurement

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A stem plot can
a. show the overall pattern of the distribution and deviations from that pattern.
b. show the data values that are the most common.
c. show the center and spread of the distribution.
d. be used to help identify any outliers.

only a and b

only c and d

all of them

only a, b and d

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To make a stem plot of a list of 50 measurements, which of the following steps should be done?
a. Order the measurements from smallest to largest.
b. Separate each measurement into a stem (the first digits) and a leaf (the final digit).
c. Line the stems up vertically and then fill the leaves in opposite the appropriate stems.
d. Include all possible stems, even those that don’t have leaves to go with them.
e. Order the leaves from smallest to largest.

only a and b

only b, c and d

only a,b and c

all of them

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To visualize data you can start with a picture such as a
a. bar chart
b. pie chart
c. dotplot
d. stemplot

only c and d

all of them

only d

only a and b

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True or False
An expanded stem plot can be used to compare two data sets by placing two stem plots back-to-back.

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True or False
Measurement or count data, also called quantitative data, takes numerical values such as height in centimeters or annual salary in dollars.

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Categorical or qualitative because it is not a measurement or a count

Quantitative because it consists of a measurement

Explanation / Answer

Can you post the different questions separately. Here are answers for the top 2 questions and the reasoning for them:

1. Some distributions have simple shapes, such as unimodal (single peak) or symmetric (one side is the mirror image of the other).

True. Like the normal distribution

2. Quantitative. This is because time is an amount. Time is something that can be counted. Something that can be counted is basically a quantitative variable.

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