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White raven [17]
3 years ago
10

The 2015 American Time Use survey contains data on how many minutes of sleep per night each of 10,900 survey participants estima

ted they get. The times follow the Normal distribution with mean 529.9 minutes and standard deviation 135.6 minutes. An SRS of 100 of the participants has a mean time of x¯=514.4 minutes. A second SRS of size 100 has mean x¯=539.3 minutes. After many SRSs, the values of the sample mean x¯ follow the Normal distribution with mean 529.9 minutes and standard deviation 13.56 minutes.
What is the population?

A. The population is 135.6 million respondents to the American Time Use Survey.
B. The population is the 100 participants in the SRS.
C. The population is the 10,900 respondents to the American Time Use Survey.
D. The population is all Americans who sleep through the night.
Business
1 answer:
steposvetlana [31]3 years ago
7 0

The population is the 10,900 respondents to the American Time Use Survey.

Explanation & Solution:

Statistics indicate that a large number of findings with similar features are related to in the population.

A sample is a subset from which it has been extracted.

"The American Time Usage survey for 2015 provides details about how many minutes of sleep every evening are assigned to each of 10,900 survey respondents.

An SRS of 100 participants (a plain random sample) has x = 514.4 minutes on average.

The size of the U.S. Time Utilization Survey is 10,900.

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6 0
3 years ago
The operations vice president is adjusting the production quantities for the upcoming month of March for the coal company. Last
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Answer:

The correct answer is letter "B": Increase output and hire more workers.

Explanation:

According to the supply law, if the price increases so will the quantity supplied and if the price decreases the same will happen with the quantity supplied. We could say that the relationship between price and quantity supplied is directly proportional.

In the example, <em>as the price of coal increased so will the quantity supplied</em>. <em>If there is to be more supply the output should be higher which is likely to be interpreted in a need for more employees</em>.

6 0
3 years ago
A bank loaned out ​$19 comma 00019,000​, part of it at the rate of 7 %7% per year and the rest at 15 %15% per year. If the inter
Alla [95]

Answer:

Explanation:

Let x be the amount loaned at 7% and ($19,000 - x) be the amount loaned at 15%

Given:

Interest incurred at 7%, I1 + Interest incurred at 15%, I2 = $2000

Interest, I = amount × rate

I1 = 7/100 × x

I2 = 15/100 × ($19,000 - x)

From the above expressions,

(0.07)x + (0.15) × ($19,000 - x) = $2,000

Solving for x,

0.07x + 2850 - 0.15x = 2000

Collecting like terms,

0.08x = 850

x = $10625

The amount loaned at 7% interest is

$10625

The amount loaned at 15% interest is ($19000 - $10625)

= $8375

6 0
2 years ago
Farrick and Kenley want to form a business in which they invest money in exchange for stock ownership in their organization. Wha
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Answer:

Limited liability company

Explanation:

In simple words, A limited liability corporation (LLC) is a type of private company structure. It's among the most frequent legal structures for forming a company. In a comprehensive partnerships all members are accountable for the firm and have unlimited accountability for its obligations.

Thus the limited liability structure is most suitable for the two.

8 0
2 years ago
An investment project has annual cash inflows of $4,300, $4,000, $5,200, and $4,400, for the next four years, respectively. The
xeze [42]

Answer:

1.64 years

2.27 years

3.13 years

Explanation:

Discounted payback calculates the amount of time it takes to recover the amount invested in a project from it cumulative discounted cash flows

Present value of cash flow in year 1 = 4300 / 1.13 = 3805.31

Amount recovered in year 1  = -5800 + 3805.31 = -1994.69

Present value of cash flow in year 2 = 4000 / (1.13^2) = 3132.59

Amount recovered in year 2 =-1994.69 + 3132.59 = 1137.90

Payback period = 1 + 1994.69/3132.59 = 1.64 years

B

Present value of cash flow in year 1 = 4300 / 1.13 = 3805.31

Amount recovered in year 1  = -7900 + 3805.31 = -4094.69

Present value of cash flow in year 2 = 4000 / (1.13^2) = 3132.59

Amount recovered in year 2  = -4094.69 + 3132.59 = -962.10

Present value of cash flow in year 3 = 5200 / (1.13^3) = 3603.86

Amount recovered in year 3  = -962.10 + 3603.86 = 2641.76

Payback period = 2 years + -962.10 / 3603.86 = 2.27 years

C

Present value of cash flow in year 1 = 4300 / 1.13 = 3805.31

Amount recovered in year 1  = -10900 + 3805.31 = -7094.69

Present value of cash flow in year 2 = 4000 / (1.13^2) = 3132.59

Amount recovered in year 2  = -7094.69 + 3132.59 = -3962.10

Present value of cash flow in year 3 = 5200 / (1.13^3) = 3603.86

Amount recovered in year 3  = -3962.10 + 3603.86 = -358.24

Present value in year 4 =  4400 / (1.13^4) = 2698.60

Amount recovered in year 4  = -358.24 + 2698.60 = 2340.36

Payback period = 3 years + 358.24 + 2698.60 = 3.13 years

7 0
2 years ago
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