Mathematics, 08.04.2020 05:02, nculberson6
You need to compute a 99% confidence interval for the population mean. How large a sample should you draw to ensure that the sample mean does not deviate from the population mean by more than 3.2? (Use 12.8 as an estimate of the population standard deviation from prior studies.) Use Table 1. (Round intermediate calculations to 4 decimal places and "z" value to 2 decimal places. Round up your answer to the nearest whole number.)
Sample size ___
Let the following sample of 8 observations be drawn from a normal population with unknown mean and standard deviation: 22, 23, 14, 24, 18, 16, 15, 12. Use Table 2.
a.
Calculate the sample mean and the sample standard deviation. (Round intermediate calculations to 4 decimal places, "sample mean" to 3 decimal places and "sample standard deviation" to 2 decimal places.)
Sample mean__
Sample standard deviation__
b.
Construct the 90% confidence interval for the population mean. (Round "t" value to 3 decimal places, and final answers to 2 decimal places.)
Confidence interval __ to __
c.
Construct the 99% confidence interval for the population mean. (Round "t" value to 3 decimal places, and final answers to 2 decimal places.)
Confidence interval __ to __
d.
What happens to the margin of error as the confidence level increases from 90% to 99%?
1.As the confidence level increases, the interval becomes narrower.
2.As the confidence level increases, the interval becomes wider.
Answers: 1
Mathematics, 21.06.2019 17:00, valeriekbueno
100 points, hi, iām not sure how to get the equation from the graph and table.
Answers: 2
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Apolygon is shown on the graph: a polygon is shown on the coordinate plane. vertices are located at 3 comma 5, 1 comma 3, 1 comma 1, 2 comma 0, 4 comma 0, 5 comma 1, and 5 comma 3. what effect will a translation 3 units down and 2 units left have on the polygon? be sure to address how it could impact the angles, side lengths, and congruency between the original pre-image and the image. xd i need
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Mathematics, 22.06.2019 00:30, amandapill
What is the area of the parallelogram? 48 sqrt(3)cm2 48 cm2 24 sqrt (3) cm2 24 cm2
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You need to compute a 99% confidence interval for the population mean. How large a sample should you...
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