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Are there any thoughts on a question involving probability
ABC Inc. carries inventory of 2000 items. The population standard deviation for the cost of the inventory is 225. A consultant recommends that the company takes a sample of 180 items from its inventory to estimate the average cost per item.
What is the probability that the sample mean will be within ±28 of the population mean µ?
Smartphone adoption among American teens has increased substantially, and mobile access to the Internet is pervasive.
in a test of weight loss programs 198 subjects were divided such that 33 subjects followed each of 6 diets. each was
(a) State the hypothesis for a right-tailed test. (b) Obtain a test statistic and p-value assuming equal variances. Interpret these results. (c) Is the difference in mean scores large enough to be important?
heart failure is due to either natural occurrences 87 or outside factors 13. outside factors are related to induced
Explain whether x¯ or µ is the correct statistical notation for each mean described. The mean hours of study per week was 15 hours for a sample of n = -30.
If a 911 call is taken at 10:07 p.m., what is the probability that the next call will occur before 10:30 p.m.?- If a 911 call is taken at 11:30 p.m., what is the probability that the next call will occur after 11:45 p.m.?
indicate whether each statement refers to a uniformly distributed variable normally distributed variable andor an
you and a friend decided to get your cars inspected. you are informed that 72 of cars pass inspection. if the event of
Does this sample provide enough evidence to conclude that self-esteem scores for these adolescents are significantly different from those of the general population? Use a two-tailed test with x =.01.
Plot the means versus the platform type. Does there appear to be a difference in pricing?- Is it reasonable to assume that the variances are equal? Explain.
Microcomputer components. A staff analyst for a manufacturer of microcomputer components has compiled monthly data for the past 16 months on the value of industry production of processing units that use these components (X, in million dollars) an..
How many would you expect to say that CFCs are not the main cause of the greenhouse effect, assuming the percentage remained the same?
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