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A sample of 10 observations taken from a normally distributed population produced the following data:
44 31 52 48 46 39 43 36 41 49
(a) Test the hypothesis that H0 : μ = 44 vs. Ha : μ /= 44 using α = 0.10. Draw a box plot and normal plot for this data, and comment.
(b) Find a 90% con?dence interval for the population mean μ.
(c) Discuss the meanings of (a) and (b). What can we conclude?
A standard deviation of $5000. What is the probability that a randomly selected employee will have a starting salary of at least $31ooo?
1. a research company stated that 20 of missed school days are due to asthma. if a group of 400 school children are
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A has one share in a lottery in which there is 1 prize and 2 blanks; B has three shares in a lottery in which there are 3 prizes and 6 blanks. Compare probability of A's success to that of what is B's success?
Find the line of best fit and graph it on the scatterplot. State the equation of the line - State the slope of the line of best fit. Carefully interpret the meaning of the slope in a sentence or two
Find the probability that a value randomly selected from this population will have a value between 90 and 130.
What is the significance level for the appropriate region of part (b)? How would you change the region to obtain a test with alpha=.001?
Consider a machine that fills soda bottles. The process has a mean of 15.9 ounces and a standard deviation of 0.06 ounces. The specification limits are set between 15.8 and 16.2 ounces. a) Compute and interpret the machine's Cp
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recently a company tested three different machine types to see if there was a difference in the mean thickness of
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
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