In finding the areas under the normal curve, if we wish to determine the area above...

In finding the areas under the normal curve, if we wish to determine the area above A, and A is greater than the mean, we?

A) we find the area below A on the positive Z table and subtract it from .5000

. B) we find the area below A on the positive Z table and subtract it from 1.000.

C) the positive Z table gives us the area above A

D) we find the area below A on the negative Z table

In finding the areas under the normal curve, if we wish to determine the area below A, and A is greater than the mean, we ?

A) we find the area below A on the positive Z table and subtract it from .5000.

B) we find the area below A on the positive Z table and subtract it from 1.000.

C) the positive Z table gives us the area belowA

D) we find the area below A on the negative Z table

In constructing a confidence interval estimate of the population mean you decide to select 49 random observations to get your point estimate of the mean (sample mean). Your friend is also constructing a similar confidence interval estimate but decides to use a sample size of 36 random observations. Which of the following is true?

	A.	Your friend’s confidence interval estimate has a greater degree of confidence.
	B.	Your confidence interval estimate has a greater degree of confidence.
	C.	Your confidence interval estimate is narrower.
	D.	Your confidence interval estimate is wider. The width of a confidence interval estimate for a proportion will be: a. Narrower for 99% confidence level than for a 95% confidence level b. Wider for a sample size of 100 than for a sample size of 75 c. Narrower for 90% confidence level than for a 95% confidence level d. Narrower when the sample proportion is .50 than when the sample proportion is .20

Expert Solution

In finding the areas under the normal curve, if we wish to determine the area above A, and A is greater than the mean, we?-

B) we find the area below A on the positive Z table and subtract it from 1.000.

In finding the areas under the normal curve, if we wish to determine the area below A, and A is greater than the mean, we ?-

C) the positive Z table gives us the area below A

In constructing a confidence interval estimate of the population mean you decide to select 49 random observations to get your point estimate of the mean (sample mean). Your friend is also constructing a similar confidence interval estimate but decides to use a sample size of 36 random observations. --

C) Your confidence interval estimate is narrower.... - Confidence Interval is inversely proportional to the sample size.

The width of a confidence interval estimate for a proportion will be:---

C) Narrower for 90% confidence level than for a 95% confidence level

PLEASE LET ME KNOW IF YOU HAVE ANY DOUBTS. THANKS!!

orchestra answered 1 year ago

2. Area under the normal curve a. Area between 2 sd above and the mean (z...

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Determine the area under the standard normal curve that lies to the left of (a) Upper...

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Determine the area under the standard normal curve that lies to the left of (a) Upper...

Determine the area under the standard normal curve that lies to the left of (a) Upper Z equals 0.08 commaZ=0.08, (b) Upper Z equals 0.51Z=0.51, (c) Upper Z equals negative 1.15Z=−1.15, and (d) Upper Z equals 0.56Z=0.56. (a) The area to the left of Zequals=0.080.08 is nothing. (Round to four decimal places as needed

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Determine the area under the standard normal curve that lies to the left of a) Z= -0.08 b) Z= 1.39 c) Z= -0.77 d) Z= 0.91

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5, Determine the area under the standard normal curve that lies to the right of (a)...

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Question

In finding the areas under the normal curve, if we wish to determine the area above...

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Expert Solution

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