Question

Question 6 (1 point)

Ten students took a statistics final and their scores were 77.4; 77.7; 80.7; 73.8; 86.3; 76.8; 80.6; 84.8; 82.4; 74.4. Calculate the mean of the dataset.

Question 6 options:

	1) 794.9
	2) 10
	3) 79.49
	4) 79.15
	5) 4.201

Question 7 (1 point)

Suppose that the middle 95% of monthly food expenditures for a family of four fall between 365.32 and 670.48. Give an approximate estimate of the standard deviation of the expenditures. Assume the expenditures have a normal distribution.

Question 7 options:

	1) 38.145
	2) 517.9
	3) 76.29
	4) -76.29
	5) 152.58

Question 8 (1 point)

If the scores per round of golfers on the PGA tour are approximately normally distributed with mean 60.8 and standard deviation 2.19, what is the probability that a randomly chosen golfer's score is between 61 and 67 strokes?

Question 8 options:

	1) 0.4613
	2) 0.0023
	3) 0.5364
	4) 0.0235
	5) We do not have enough information to calculate the value.

Question 9 (1 point)

If the scores per round of golfers on the PGA tour are approximately normally distributed with mean 65.9 and standard deviation 2.94, what is the probability that a randomly chosen golfer's score is between 66 and 68 strokes?

Question 9 options:

	1) 0.2375
	2) We do not have enough information to calculate the value.
	3) 0.0075
	4) 0.2489
	5) 0.5136

Answer 1

The solution is done showing all steps with calculations and required formulas. A z table is also attached for better understanding. Hope you can understand.

z-table -