Chapter P.1 Exercise Question 08

P.1.8

Tennis players often spin a racquet to decide who serves first. The spun racquet can land with the manufacturer's label facing up or down. A reasonable question to investigate is whether a spun tennis racquet is equally likely to land with the label facing up or down. (If the spun racquet is equally likely to land with the label facing in either direction, we say that the spinning process is fair). Suppose that you gather data by spinning your tennis racquet 100 times, each time recording whether it lands with the label facing up or down.

In this scenario,

a. each 100 spins

b. the tennis racket

c. which way the label lands

d. the probability the label lands facing up

are the observational units.

In this scenario,

a. each of the 100 spins

b. which way the label lands

the tennis racket

c. the probability the label lands facing up

is the variable.

In this scenario, the variable(s) would be

a. categorical

b. quantitative

Chapter P, Concept Check Question 2.2a

Your answer is incorrect.Try again.

P.2.2a

?Consider three students with the following distributions of 24 quiz scores:

Amanda:8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,

8,8,8,8,8,8

Barney: 5,6,6,6,6,7,7,7,7,7,7,7,8,8, 8,8, 8,8,

8,9,9,9,9,10

Charlene: 0,0,0,0,0,0,0,0,0,0,0,0,10,10,10,10,

10,10,10,10,10,10,10,10

? ?Without bothering to do any calculations, which student has thesmalleststandard deviation of quiz scores?

a. Amanda - more consistency in values

b. Barney - middle range of values

c. Charlene - most extreme range of values

d. You cannot decide without performing the calculations for comparison.

Chapter P.2 Exercise Question 09

P.2.9

The July 8, 2012 edition of the San Luis Obispo Tribune listed predicted high temperatures (in degrees Fahrenheit) for locations throughout San Luis Obispo county (SLO-county) on that date. The newspaper also listed predicted high temperatures for locations throughout California, the United States and around the world. The following dotplots display the four distributions.?

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