Question

The mean cost of a flank steak, broccoli, and rice bought at the grocery store is $13.04. A sample of 100 neighborhood restaurants showed a mean price of $12.65 and a standard deviation of $2 for a comparable restaurant meal.

using the sample from the 100 restaurants, what is the p value?

Answer 1

To test the claim that the standard deviation is greater than $15 for a sample of 43 stores, we can use a one-sample t-test and calculate the test statistic and p-value.

Step-by-step explanation:

To test the claim that the standard deviation is greater than $15, we can use a one-sample t-test. The null hypothesis (H0) is that the standard deviation is less than or equal to $15, and the alternative hypothesis (Ha) is that the standard deviation is greater than $15. We can calculate the test statistic using the formula t = (sample standard deviation - hypothesized standard deviation) / (sample standard deviation / sqrt(sample size)). Then, we can find the p-value associated with the test statistic using a t-distribution table or a calculator.