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lukranit [14]
3 years ago
13

A researcher reports survey results by stating that the standard error of the mean is 20. The population standard deviation is 5

00.
a. How large was the sample used in this survey?
b. What is the probability that the point estimate was within ±25 of the population mean?
Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
5 0

multiply 20 by 500. it should help you with the problem.

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What is the answer? {y=2x−6 y=5x−21
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Ab=45 mm,bc=10cm 4mm ,cd = 5 cm 6 mm ,de= 35 mm,ea=x cm, and the perimeter of irregular pentagon is 280 mm. Find the length of t
DaniilM [7]

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Step-by-step explanation:

we know that

The perimeter of a polygon is equal to the sum of its length sides

Remember that

1 cm=10 mm

In this problem we have

AB=45 mm ------> convert to cm -----> AB=45/10=4.5 cm

BC=10 cm 4 mm -----> convert to cm -----> BC=10+4/10=10.4 cm

CD=5 cm 6 mm  -----> convert to cm -----> CD=5+6/10=5.6 cm

DE=35 mm ------> convert to cm -----> DE=35/10=3.5 cm

EA=x cm

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3 0
3 years ago
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