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Suppose a batch of metal shafts produced in a manufacturing company have a standard deviation of 1.3 and a mean diameter of 202 inches. If 70 shafts are sampled at random from the batch, what is the probability that the mean diameter of the sample shafts would be less than201.9inches? Round your answer to four decimal places.
shown below is a portion of a computer output for a regression analysis relating y dependent variable and x independent
An article about women in business claims that 28% of all small businesses in the United States are owned by women. Find the critical value (or values), and clearly show the rejection and nonrejection regions. Compute the test statistic. Decide wheth..
Construct a 90% two-sided confidence interval onthe difference between the proportion nonconforming in processes 1 and 2. Based on this confidence interval, can you conclude at a significance level of 10% that the difference is not equal to 10%? W..
Create a scatterlpot of P_RFM and P_HELM. If drawing plot by hand, use graph paper to make sure accuracy. Be sure you label axes. After you have created the scatterplot, consider its form and direction. Recognize outliers, if any.
a popular web site among college students is studentinfo.com. it lists information about jobs both in the united states
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighted on a very accurate scale. The results in grams were:
the average number of mosquitos in a stagnant pool per square meter with a standard deviation of 8. if a sample of 25
Three different instructional techniques are being considered for training mechanics to perform a difficult emissions-reduction adjustment on fuel-injection engines.
Determine the expected market return on $ 20,000 if the expected return on asset is 20%, its beta is 1.5, and the risk free rate is 5 percent?
question 1 the average teachers salary in arizona is 42300 with standard deviation 5000. assuming a normal distribution
What can you say about the results of the hypothesis test: H0: mean = 5 vs. H1: mean not equal to 5 tested using the same sample at the same level of significance? reject H0 in the second test and do not reject H0 in the second test
A real estate agent in the coastal area of Georgia wants to compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean.
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