For full credit, you must show All your work and Explain All your answers! Point values given are those I will use If I choose to grade that problem 1. In Project 1 this Fall you studied Recording Times in minutes for Dr. Marion's Sample of 28 Recordings of Mahler's 9th Symphony, which are:

80 82 78 80 89 87 79 90 84 88 81 81 81 86 85 77 84 77 82 85 81 91 82 86 86 89 70 81

h. If µ = 85 and σ = 5, find the probabilities that the:

i. Mean Recording Time of 64 Recordings exceeds 84'30".

ii. Total Recording Time of 100 Recordings exceeds 6 days

I. Using σ = 5, how large a Sample would we need in order to estimate Mean Recording Times for Mahler's 9th Symphony to a:

i. 95% Error Margin of 2 minutes?

ii. 99.5% Error Margin of 48 seconds?

iii. Compare your answers and explain their difference.

y + 11 = (1/4)(x + 16)

step-by-step explanation:

486in is correct

step-by-step explanation:

$320 to $405

step by step explanation:

in one day he earns between $64 and $81

therefore if he works for 5 days, he will earn between 64 x 5 to 81 x 5

= $320 to $405

third choice down

step-by-step explanation:

the first inequality is based on the number of adults and campers, and the second inequality is based on the cost of feeding both the adult and the camper.

we know that there is room for 525 people max.   it's ok to have less than 525, but it's not ok to have more than 525, so the inequality is less than or equal to.   the number combination of adults (x) and campers (y) cannot exceed this 525 max.   therefore:

x + y ≤ 525

now we talk about cost.   it costs $9 to feed one adult, so depending upon the number of adults you have (x) depends upon how much it will cost to feed that number of adults.   same with the campers, who cost $5 to feed.   the adults can be represented by 9x and the campers can be represented by 5y.   since the budget cannot exceed 1,200, the second inequality is:

9x + 5y ≤ 1200