Question

Select the correct answer below: A sample mean of 20 miles per gallon and a sample standard deviation of 2 miles per gallon are obtained usin a simple random sample of 16 vehicles from a large group of vehicles, which have approximately normally distributed fuel consumption rates. A simple random sample of 23 dogs is taken from the dogs within a county with approximately normally distributed weights. The sample mean is 33 pounds, the sample standard deviation is 4 pounds, and the population standard deviation is 3.0 pounds. A simple random sample of 22 individuals is taken from the residents of a city and the commute times were collected. The sample mean is 16 minutes and the sample standard deviation is 2 minutes. A sample mean of 231 points and a standard deviation of 11 points are obtained using a convenient sample of I A sample mean of 231 points and a standard deviation of 11 points are obtained using a convenient sample of students from a school of 1,204 students, which have approximately normally distributed standardized test scores

Answer 1

Correct statement:

A simple random sample of 23 dogs is taken from the dogs within a country with approximately normally distributed weights. The sample mean is 33 pounds, the simple standard deviation is 4 pounds, and the population sd is 3 pounds.

Answer 2

she is been working harder and harder every day