Question

Write a confidence interval problem using the option below. Gather the appropriate data and post your problem (without solution) in the discussion board. Once your initial post is complete, respond to your own post with the solution. Think about the population mean that you may be interested in and propose a confidence interval problem for this parameter. Estimate the population mean number of times that adults ate fast food each week. Data is after speaking to with 7 people I know and found that they ate fast food 1, 4, 0, 2, 4, 0 and 3 times last week. I choose to calculate a 90% confidence interval for the populate mean. Please help solve this!!

Answer 1

= (1 + 4 + 0 + 2 + 4 + 0 + 3)/7 = 2

s = sqrt(((1 - 2)^2 + (4 - 2)^2 + (0 - 2)^2 + (2 - 2)^2 + (4 - 2)^2 + (0 - 2)^2 + (3 - 2)^2)/6) = 1.732

At 90% confidence interval the critical value is t^* = 1.943

The 90% confidence interval for population mean is

+/- t^* * s/

= 2 +/- 1.943 * 1.732/

= 2 +/- 1.272

= 0.728, 3.272