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Verdich [7]
3 years ago
7

In order to estimate the average time spent per student on the computer terminals at a local university, data were collected for

a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours.
The standard error of the mean is:

a) 7.50 b) 0.39 c) 2.00 d) 0.20
Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
4 0

Answer: option D

Step-by-step explanation:

The formulae for standard error = standard deviation/√n

But population standard deviation = 1.8 and sample size = n = 81

Standard error = 1.8/√81 = 1.8/9 = 0.2

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Answer:

x = 16.5

Step-by-step explanation:

0.5x + 1.75 = 10

Subtract 1.75 from both sides:

0.5x = 8.25

Divide both sides by 0.5

x = 16.5

Check your work!

0.5(16.5) + 1.75 = 10

8.25 + 1.75 = 10

10 = 10

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car purchased for 18,500 after each year the resale value decreases by 30%. what will the resale value be after 4 years
vesna_86 [32]
Equation is 18500x.70 to the power of x

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2 years ago
Jay's net earnings are $4000 per month. Jay's monthly expenses are $3000 per month, with $2000 of that being rent. According to
Solnce55 [7]

In Five month Jay should have $15,000  in his account has emergency fund

<h3>Given Data</h3>

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Since we have a monthly expenses of $3000 a five month emergency fund will be

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Learn more about emergency fund calculation here:

brainly.com/question/13420184

7 0
2 years ago
A glass fish tank in the shape of a rectangular prism has a base that measures 22 inches by 12 inches. If the tank can hold a ma
Umnica [9.8K]

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Step-by-step explanation:

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h = 3960 /(22 x 12)

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7 0
3 years ago
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Answer:

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Step-by-step explanation:

3 0
2 years ago
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