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Confidence Intervals

Use these data and hypothesis-testing techniques along with a 5% level of significance to determine whether the mean hourly wage of a manufacturing worker has changed.

Subject:

Statistics

Topic:

All Topics

Posting ID:

4168

OTA ID:

101733

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Normal Distribution. Suppose that the height of a man is normally distributed with a mean of 5'9" (69") and a standard deviation of 2". Find the minimum height of the ceiling of an airplane, such that at most 2% of the men walking down the aisle will have to duck their heads?

Suppose that the height of a man is normally distributed with a mean of 5'9" (69") and a standard deviation of 2". Find the minimum height of the ceiling of an airplane, such that at most 2% of the men walking down the aisle will have to duck their heads? A. Define the random variable? B. List the parameters for the distribution and their values? C. Write the probability statement for this problem? D. Solve the problem.

Subject:

Statistics

Topic:

All Topics

Posting ID:

4178

OTA ID:

103060

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Calculating the binomial probability question using a normal standard distribution table.

Acme Plumbing Supply has just received a shipment of 5,000 valves for chemical plants, where regular steel valves would corrode. However, it is known that in the shipment 50 of the valves are regular steel which were inadvertently included. Unfortunately there was no was to distinguish between the two types of valves. They have an order to ship 5 valves to a customer. If acme fills the order, what is the probability that one or more will be a regular valve? a. what distribution will be used? b. what are the parameters of this distribution? c. calculate the parameters. d. represent the question as a probability statement. e. calculate the probability?

Subject:

Statistics

Topic:

All Topics

Posting ID:

4184

OTA ID:

103058

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test hypotheses

PERSISTANT LOW HEMOCRIT IN ALL THE ELDERLY PATIENTS IN A NURSING HOME F .31, WITH A NORMAL OF .41. AN INTERVENTION PROGRAM OF AN IRON SUPPLEMENT WAS INITIATED TO SEE IF THE HEMOCRIT WOULD INCREASE. A RANDOM SAMPLE OF 100 PATIENTS SHOWED THAT 60 PATIENTS NOW HAD ELEVATED LEVELS OF HEMOCRIT OF .41. CAN WE CONCLUDE AT ALPHA= 0.05 THAT THE INTERVENTION WAS A SUCCESS? a. what is the error value. b. state the null and alternative hypotheses c. define the test statistic d. develope the decision rule. e.compute the test statistic f. state the conclusion.

Subject:

Statistics

Topic:

All Topics

Posting ID:

4203

OTA ID:

102454

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graph, stem and leaf, range and mode

AS A RESULT OF A PROLONGED ECONOMIC BOOM, TORONTO IS UNDERGOING SEVERAL CHANGES THAT ARE STARTING TO CAUSE SOCIAL AND ECONOMIC PROBLEMS. ONE SERIOUS PROBLEM IS THE LACK OF AFFORDABLE HOUSING FOR YOUNG PEOPLE. THE HOUSING PRICES OVER A 12-MONTH PERIOD ARE SHOWN BELOW. JAN $195,000 JUL $205,000 FEB 196,000 AUG 199,400 MAR 205,000 SEP 201,000 APR 210,000 OCT 197,000 MAY 212,000 NOV 192,000 JUN 210,000 DEC 190,000 A. GRAPH THE DATA IN A CHART. DESCRIBE THE TREND YOU SEE. B. CALCULATE THE MEAN AND STANDARD DEVIATION. C. CONSTRUCT A STEM AND LEAF DISP... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

4204

OTA ID:

102922

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