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Recall that very satisfied customers give the XYZ- Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ- Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the claim that the mean composite satisfaction rating for the XYZ- Box exceeds 42. a Letting m represent the mean composite satisfaction rating for the XYZ- Box, set up the null hypothesis H0 and the alternative hypothesis H a needed if we wish to attempt to provide evidence supporting the claim that m exceeds 42. b The random sample of 65 satisfaction ratings yields a sample mean of . Assuming that s equals 2.64, use critical values to test H0 versus H a at each of a .10, .05, .01, and .001. c Using the information in part b, calculate the p- value and use it to test H0 versus H a at each of a .10, .05, .01, and .001. d How much evidence is there that the mean composite satisfaction rating exceeds 42?
Find the probability taht exactly 6 are satisifed with the airlines. Find the probability that fewer than 4 are satisfied with the airlines. Find the probability that 5 or more are satisfied with the airlines. Find the probability that between 3 a..
At a local supermarket receiving dock, the number of truck arrivals per day is recorded for 100 days. Estimate the mean from the sample.
Car Emissions: Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents.
Using this test 80% of Down's syndrome cases can be identified at birth, while 5% of normals are detected as positive. a. What is the sensitivity and specificity of the test?
For the most recent year available the mean annual cost to attend a private university in the US was $26,889. Assume the distribution of annual costs follows a normal probability distribution and the standard deviation is $4,500. 95% of all studen..
A campus organization will select one day of the week for an end of year picnic. Assume that the weekdays, Monday through Friday, are equally likely and that each weekend day
Given a sample size of 9,245, a sample mean of 38, a standard deviation of 8.15, and a confidence level of 97%, calculate the lower bound of the confidence interval.
The information is reported below. Is it reasonable to conclude the percent is less now than five years ago?
The general social survey is an annual survey given to about 1,500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe the respondents' views of employment.
If you draw one ball from the urn what is the probability that it is blue or white?
What is the probability that Sara will die in her 60 th year? Using this probability and the $50,000 death benefit, what is the expected loss to Big Rock Insurance?
Suppose 10 balls, numbered 1-10, are to be distributed randomly into 10 boxes. a) What is the probability all 10 balls are placed into one box? b) What is the probability that no boxes are empty?
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