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A sample of 33 observations is selected from a normal population. The sample mean is 30, and the population standard deviation is 4. Conduct the following test of hypothesis using the 0.05 significance level.
H0 : μ ≤ 29
H1 : μ > 29
A. What is the decision rule? Round to 3 decimal places.
Reject H0, when z > ____________
B. What is the value of the test statistic? Round answer to 2 decimal places.
C. What is the p-value? Round to 4 decimal places.
If the doctor wants to use height to predict head circumference run a linear regression on the data. Find the r-value and comment about it.
Four have a 4/10,000 chance for failure. One component has a 1/100 chance for failure. What is the overall reliability of the product?
Following are measurements of tensile strength in ksi (x) and Brinell hardness (y) for 10 specimens of cold drawn copper. Assume that tensile strength and Brinell hardness follow a bivariate normal distribution.
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
one of two urns is chosen at radom. then a ball is chosen from that urn. urn 1 contains 1 white balls and 3 red balls.
I want it to be analysed with descriptive statistics, means/medians of variables and chi-square analysis. Interpretations of the results, their links or interesting points among the results must be explain clearly.
specifications for an aircraft bolt require that the ultimate tensile strength be at least 18 kn. it is known that 10
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Formulate a linear programming model that can be used to develop a daily production schedule for the Buffalo and Dayton plants that will maximize daily production of ignition systems at Cleveland.
a. Select the variable Sales. Develop a frequency distribution and histogram for Sales. b. Compute the mean, median, and standard deviation for the Sales variable. c. Determine the interquartile range for the Sales variable.
You are asked to match three songs with the performers who made those songs famous. if you guess, the probability distribution for the number of correct matches is:
Formulate the hypotheses that can be used to determine whether the sample data support the hypothesis that the mean fuel efficiency rating for midsize cars is greater than the mean fuel efficiency rating for large cars.
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