These are easy and multiple choice so please just answer all of them. 1. For the

Question

These are easy and multiple choice so please just answer all of them.

1. For the following data COMPUTE THE (?X)2 AND THE ?Y2

a. 21 AND 62

b. 49 AND 144

c. 49 AND 62

d. 21 AND 144

2. How many 78s are there in the dataset is (multiply stems by 10.0):

a. 0

b. 1

c. 3

d. 7

3. Stem and leaf displays are NOT good for comparing two groups.

a. True

b. False

4. Although bar charts are often used to show means, what is typically a better display

a. Stem and leaf plots

b. Box plots

c. Histograms

d. Frequency tables

Y327 X 1 2 4

Explanation / Answer

1.

Hence it is OPTION A. [ANSWER]

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2. There are 3 8's in the stem of 7.

Hence,

OPTION C: 3 [ANSWER]

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3. It depends on how strict you are, but it is most probably

FALSE. [ANSWER]

This is because you can compare the distributions of two groups using stem and leaf plots.

***************

4.

It depends on the purpose, but when you compare two groups, the better display is

OPTION B: BOX PLOTS [ANSWER]

because it is easier to put the plots of two groups in one figure.

x y x^2 y^2 1 3 1 9 2 2 4 4 4 7 16 49 Total 21 62

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