Question

Refer to the following three sets of facts as situation A.

Suppose that the number of passengers flown on all of United flights is 223, 175, 322, 196, 257, 274, 311, 212, 213, 189, 194, 199, 204, etc.

We take a sample of 25 of these flights and the passengers flown were 200, 175, 186, 199, 205, 204, 202, 294, 264, etc. (the remaining figures are not shown).

We take the average of that sample and 36 more samples and the averages were 265.5, 270.25, 190, 200, 235.25, 170, 185, etc.

1. Which of these is the sample distribution?

A) 223, 175, 322 etc.

B) 200, 175, 186 etc.

C) 265.5, 270.25, 190 etc.

2) Which of these is the population distribution?

A) 223, 175, 322 etc.

B) 200, 175, 186 etc.

C) 265.5, 270.25, 190 etc.

3) Which of these is the sampling distribution?

223, 175, 322 etc.

200, 175, 186 etc.

265.5, 270.25, 190 etc.

4) Suppose that the mean of the population distribution is 200 and the standard deviation is 25. According to the Central Limit theorem....

What will be the mean of the sampling distribution?

A) 200/25

B) 200/square root of 25

C) 200

5) What will be the shape of the sampling distribution?

A) Belly Shaped

B) Pear Shaped

C) An Ohio State Buckeye Nut

D) Bell Shaped

6) What will be the standard deviation of the sampling distribution?

A) 200/25

B) 25 / Square Root of 25

C) 200 / Square Root of 25

D) 25 / Square Root of 36

7) Situation B. Suppose we now take 9 samples each with 36 flights in each sample. According to the Central Limit Theorem...

The standard deviation of this sampling distribution will be...

A) 25 / Square Root of 25

B) 25/ Square Root of 9

C) 25 / Square Root of 36

8) The sampling distribution from situation B will be

A) Wider

B) More Narrow

C) Have the same spread

Answer 1

Vote if this is useful.