A real estate agent compares the selling prices of homes in two suurbs of Seattle to see whether there is a significant difference in price. The results of the study are shown below.

Suburb 1 Suburb 2

x

$63,255, $60,102

s

$5,602 , $4,731

n

35, 40

- Find the p-value for the test and round to 4 significant decimal places.

2.Then find the 99% confidence interval for the difference in means. Put your answers in (a, b) form and round to 3 significant decimals

3.What is the null hypothesis?

A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia. The data obtained is shown in the table below. Use α =.05

**Africa, Asia**

x

55.3, 65.2

α

8.1, 9.3

n

53, 42

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