Problem PageThree students wan

Anonymous
timer Asked: Apr 27th, 2016

Question description

Problem Page

Three students want to estimate the mean backpack weight of their schoolmates.
To do this, they each randomly chose 

5

 schoolmates and weighed their backpacks.
The samples are shown in the table.

(a)

Fill in the sample means in the table.
Do not round your answers.

Sample

Backpack weight (in pounds)

Sample mean

1

, 6, 2, 4, 34

3.8

2

, 4, 6, 4, 26

4.4

3

, 2, 6, 5, 45

4.4

(b)

Use the table to calculate the range of the sample means.

Rangeofsamplemeans:.6

(c)

The students are going to use the sample means to estimate the mean backpack weight of their schoolmates.

Select all the true statements below.

A single sample mean will tend to be a worse estimate than the mean of the sample means.

The mean of the sample means will tend to be a worse estimate than a single sample mean.

The closer the range of the sample means is to 0, the less confident they can be in their estimate.

The farther the range of the sample means is from 0, the less confident they can be in their estimate.



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