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Documents show that in 1940 the average household size with 3.29 people with a standard deviation...

Documents show that in 1940 the average household size with 3.29 people with a standard deviation of 1.20 people. In 2019 a sample of 25 households In Richmond Virginia showed the mean number of residents per household with 3.91. At the 0.1 significance level is it reasonable to conclude that the mean number of residents in Richmond Virginia today is different from the typical American household in 1940?

a. in the above problem the critical values are...
b. compute the value of the test statistic

Math   Statistics-And-Probability   
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Answer #1

Clearly our test statistic is greater than the critical value 1.645 .

So we will reject Ho at 0.1 level of significance

So we can say mean number of residents in Richmond Virginia today is different from the typical American household in 1940

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