A random sample of n 1 = 10 regions in New England gave the following violent crime rates (per million population). 3.3 3.7 4.2 3.9 3.3 4.1 1.8 4.8 2.9 3.1 Another random sample of n 2 = 12 regions in...

A random sample ofn
₁ = 10 regions in New England gave the following violent crime rates (per million population).

3.3

3.7

4.2

3.9

3.3

4.1

1.8

4.8

2.9

3.1

Another random sample ofn
₂ = 12 regions in the Rocky Mountain states gave the following violent crime rates (per million population).

3.7

4.1

4.5

5.5

3.3

4.8

3.5

2.4

3.1

3.5

5.2

2.8

Assume that the crime rate distribution is approximately normal in both regions.

(a)Use a calculator to calculate x₁,s
₁, x₂, ands
₂. (Round your answers to four decimal places.)

x₁=

s
₁=

x₂=

s
₂=

What is the value of the sample test statistic? (Test the difference ?₁ − ?₂. Round your answer to three decimal places.)=__

Jun 09, 2022

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