It is crucial that the variance of a production process

Reference no: EM13331702

It is crucial that the variance ofa production process be less than or equal to 25. A sample of 22 istaken. The sample variance equaled 26.

1). Construct a 90% confidence interval for the populationvariance.

2). Construct a 90% confidence interval for the populationstandard deviation.

3). State the null and alternative hypotheses to betested.

4). Compute the test statistic.

5). The null hypothesis is to be tested at the 10% level ofsignificance. Using the critical value approach, state the decisionrule for the test.

6). What do you conclude about the population variance?

Reference no: EM13331702

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