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Chapter 8: Q.13 (page 478)

A sample of 20heads of lettuce was selected. Assume that the population distribution of head weight is normal. The weight of each head of lettuce was then recorded. The mean weight was 2.2pounds with a standard deviation of 0.1pounds. The population standard deviation is known to be 0.2pounds.

Identify the following:

a. x炉=

b. 蟽=

C. n=

Short Answer

Expert verified

The value of

a). x炉=2.2

b).蟽=0.2

c).n=20

Step by step solution

01

Given Information (Part a)

The weight of each head of lettuce was then recorded. The mean weight was 2.2 pounds with a standard deviation of 0.1 pounds. The population standard deviation is known to be 0.2 pounds.

02

Explanation(Part a)

The mean weight was 2.2pounds.

Therefore,x炉=2.2.

03

Given Information (Part b)

The mean weight was 2.2pounds with a standard deviation of 0.1pounds.

04

Explanation (Part b)

The mean weight was 2.2pounds with a standard deviation of 0.1pounds.

Therefore, 蟽=0.2.

05

Given Information (Part c)

A sample of 20 heads of lettuce was selected.

06

Explanation (Part c)

A sample of 20 heads of lettuce was selected.
Therefore,n=20.

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