In 2019 the mean tip left by customers at a bar was $3.20. Before the COVID 19 NY on pause period the bar implemented a couple procedure and policy changes aimed at increasing the mean tip amount. In a sample of 55 bills the mean tip amount was $3.72 with a standard deviation of $2.84. Complete the test below using a 10% significance level. [12]a. Write the hypotheses using appropriate notation.b. Calculate the test statistic.c. Find the p-value in Stat Key or other source.d. Write the conclusion in the context of the problem.

In 2019 the mean tip left by customers at a bar was $3.20. Before the COVID 19 NY on pause period the bar implemented a couple procedure and policy changes aimed at increasing the mean tip amount. In...

In 2019 the mean tip left by customers at a bar was $3.20. Before the COVID 19 NY on pause period the bar implemented a couple procedure and policy changes aimed at increasing the mean tip amount. In a sample of 55 bills the mean tip amount was $3.72 with a standard deviation of $2.84. Complete the test below using a 10% significance level. [12]

a. Write the hypotheses using appropriate notation.

b. Calculate the test statistic.

c. Find the p-value in Stat Key or other source.

d. Write the conclusion in the context of the problem.

Jun 08, 2022