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A cola dispensing machine is set to depense 9 ounces per cup with a standard deviation of .5 oz .THe manufacturer would like to set the control limits so that for samples of 16, 5% of the sample means will be greater than the upper limit and 5% of the sample means less than the lower limit.
a at what values should the control limits be set
b what is the probability a shift int he mean to 8.8 ounces will be detected
c. what is the probability a shift in the mean to 9.1 ounces will nto be detected?
Sketch a scatter plot that could represent data from each of following. Label the axes to indicate the independent and dependent variable.
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
Test the teachers hypothesis that there is a significant difference between the pre and post tests.
University officials at a major university would like to use three -term moving averages to examine enrollment. Enrollment data (in thousands of students) for the 12 most recent terms are shown in middle column of the table below.
You're considering an investment in the common stock of Crisp Cookware. The stock is expected to pay a dividend of $2 a share at the end of the year (D1 = $2.00). the stock has a beta equal to 0.9.
Is there a relationship between sales and newspaper?
At the 1% significance level, can it be concluded that the current distribution of responses differs from that of a year ago ?? Formulate and test the appropriate hypotheses. Use the critical value approach.
Suppose that 10% of all adults jog. An opinion poll asks an SRS of 400 adults if they jog. a) What is the sampling distribution of the proportion p^ in the sample who jog?
Assume 1.5% of antennas on new Nokia cell phones are imperfect. For random sample of 200 antennas, determine the probability that: None of the antennas is defective.
No, there is not enough information to refuse hypothesis that proportion of male students who live on campus and proportion of female students who live on campus are same as the test value -1.65 is inside acceptance region (-1.96,1.96).
Assume that the mean useful life of a particular lightbulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Determine the percentage of lightbulbs that will last 2,300 hours or longer.
According to a recent survey, 275 of 400 middle-aged Americans said they used the Internet regularly. 140 of 400 senior citizens said they used the Internet regularly.
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