(d) Compute and interpret the z-score for each of the six entertainment expenses. (Round z-score calculations to 2 decimal places Negative amounts should be indicated by a minus sign.) 2315 2374 2359 2311 2376 2371
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
![(c) If a member of the sales force submits an entertainment expense (dinner cost for four) of $390, should this expense be considered
unusually high (and possibly worthy of investigation by the company)? Explain your answer.
O No
O Yes
(d) Compute and interpret the z-score for each of the six entertainment expenses. (Round z-score calculations to 2 decimal places.
Negative amounts should be indicated by a minus sign.)
z315
z374
z359
2311
2376
z371](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4e180d85-0481-4f0a-9bba-3c40f35eaeec%2F3df2af77-d5f5-424b-86a0-bf74fd564501%2Fiwsagnk_processed.jpeg&w=3840&q=75)
![In order to control costs, a company wishes to study the amount of money its sales force spends entertaining clients. The following is a
random sample of six entertainment expenses (dinner costs for four people) from expense reports submitted by members of the sales
force.
$ 315
$ 374
$ 359
$ 311
$ 376
$ 371
(a) Calculate X,s, and s for the expense data. (Round "Mean" and "Variances" to 2 decimal places and "Standard Deviation" to 3
decimal places.)
x-bar
351.00
s^2
902.80
30.047
(b) Assuming that the distribution of entertainment expenses is approximately normally distributed,fcalculate estimates of tolerance
intervals containing 68.26 percent, 95.44 percent, and 99.73 percent of all entertainment expenses by the sales force. (Round
intermediate calculations and final answers to 2 decimals.)
x-bar t s]
x-bar ± 2s]
[x-bar + 3s]
一
320.95
381.05
290.91
411.09
260.86
441.14](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4e180d85-0481-4f0a-9bba-3c40f35eaeec%2F3df2af77-d5f5-424b-86a0-bf74fd564501%2F85m5jvh_processed.jpeg&w=3840&q=75)
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