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Chapter 8: Q.8.81 (page 482)

The Ice Chalet offers dozens of different beginning iceskating classes. All of the class names are put into a bucket. The 5 P.M., Monday night, ages 8 to 12, beginning ice-skating class was picked. In that class were 64 girls and 16 boys. Suppose that we are interested in the true proportion of girls, ages 8 to 12, in all beginning ice-skating classes at the Ice Chalet. Assume that the children in the selected class are a random sample of the population.

Calculate the following:

a. x = _______

b. n = _______

c. p鈥� = _______

Short Answer

Expert verified
  1. The value of x=64.
  2. The value of the n=80.
  3. The value ofP鈥�=0.8.

Step by step solution

01

Given information (Part a)

There are 64 girls and 16 boys in a ice skating class.

We have to calculate the value of x

02

Solution (Part a)

There are total 64 girls in the ice skating class.

The all girls are with the age of 8to 12

Therefore the valuex=64.

03

Given information (Part b)

There are 64 girls and 16 boys in a ice skating class.

We have to find the value ofn.

04

Solution (Part b)

The number of students for the ice-skating class is :

64+16=80

Therefore the n=80

05

Given information(Part c)

There are 64 girls and 16 boys in a ice skating class.

We have to findp'

06

Solution (Part c)

Let's consider the number of girls with ages 8to 12in the ice skating classes:

It is 64.

The total number of the students=80

Now, we can compute the population proportion as follow:

P鈥�=6480

P鈥�=0.8

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