7. A travel website wants to gauge the perceived quality of a major airport. The maximum possible rating is 10, and the results of a random sample of 50 travelers can be found in the Airport. xlsx file. Develop a 95% confidence interval estimate of the population mean rating for the airport based upon this data.

The 95% confidence interval has Minimum = 6.053 and Maximum = 7.467

Step-by-step explanation:

Here we have

Data as

1 5 6 7 8 8 8 9 9 9 9 10 3 4 5 5 7 6 8 9 10 5 4 6 5 7 3 1 9 8 8 9 9 10 7 6 4 8 10 2 5 1 8 6 9 6 8 8 10 10

The sum is 338

∴ Mean, = 6.76, Standard Deviation, s = 2.55

Sample size, n = 50

For a 95% confidence interval, we have

Where z is;

z at 95% z = 1.96

Therefore, we have

95% confidence interval as Minimum = 6.053 to Maximum = 7.467.

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,