A sample of size

125

will be drawn from a population with mean

50

and standard deviation

17

. Use theCumulative Normal Distribution Tableif needed.

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(a) Find the probability that

x

will be between

49

and

52

. Round the final answer to at least four decimal places.

The probability that x will be between 49 and 52 is .

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(b) Find the

35th

percentile of

x

. Round the answer to at least two decimal places.

The 35th percentile of x is .

Drug concentrations:A sample of

10

people ingested a new formulation of a drug. Six hours later, the concentrations in their bloodstreams, in nanograms per milliliter, were as follows.

2.3

1.4

1.8

2.7

1.1

2.0

1.3

4.3

2.4

3.1

Send data to Excel

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(a) Construct a dotplot for the given sample.

12345

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(b) Is it reasonable to treat the sample as coming from an approximately normal population? Explain.

(Choose one), because the data contain (Choose one).