The greater pittsburgh area chamber of commerce wants to estimate the mean time workers who are employed in the downtown area spend getting to work. a sample of the 15 workers reveals the following number of minutes spent traveling. 29 38 38 33 38 21 45 34 40 37 37 42 30 29 35develop a 98 percent confidence interval for the population mean. interpret the results.

98% Confidence interval:  (31.74,38.4)

Step-by-step explanation:

We are given the following data set:

29, 38, 38, 33, 38, 21, 45, 34, 40, 37, 37, 42, 30, 29, 35

Formula:

where are data points, is the mean and n is the number of observations.  

Sum of squares of differences = 506.93

98% Confidence interval:  

Putting the values, we get,  

Thus, there is 98% confidence that the population mean number of minutes spent traveling by workers is between 31.74 mins and 38.40

because they could drop even lower..

d. vertex

step-by-step explanation: