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The dataset Length.jmp contains a simple random sample of 50 stainless steel sheet metal screw from Crown Bolt, Inc., and the length of each is measured using a vernier caliper. Assume that the standard deviation of all such lengths is 0.12 in. Use a .05 significance level to test the claim that the screws have a mean length different from ¾ in, as indicated on the package labels. Do the lengths appear to be consistent with the package label? How can you tell? Write a brief paragraph to summarize your findings
What is the value range for the sum of 400 draws (the possible lowest value and the largest value of the sum of 400 draws)? What is the expected value and standard error of the sum of 400 draws?
Test the claim about population mean, u, at given level of significance using given sample statistics. Find out critical value(s).
A simple regression model has been developed using a sample of 11 pairs of observations. The sum of squares of error is 237.64. The standard error of the estimate is:
Perform hypothesis testing on one variable's data.
Let p represent the population proportion of all numbers in the corporate file that have a first nonzero digit of 1. Test the claim that p is less than 0.301 by using What is the value of the test statistic?
What is your decision about H0 and H1 at = 0:05? Give the orderings of the population means according to the tukey procedure. Is H0 : 2 = 4 a contrast?
The response time for Denver police to respond to emergency calls is 8.4 minutes with a standard deviation 1.7 find the probability that the response time for a call between 5 and 10 minutes.
Solve using the quadratic formula: Radicands must be enclosed within
Sugar in Cereal. Different cereals are randomly selected, and the sugar content (grams of sugar per gram of cereal) is obtained for each cereal
The samples do indicate that university A's students are younger than university B's; but is the difference significant at the 1% level?
If the test is positive, what is the probability that this person actually has heart disease?
State the null and alternative hypothesis. population standard deviation is $2500 and level of test is 0.05 what is the critical value?
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