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The American Restaurant Association collected information on the number of meals eaten outside the home per week by young married couples. A survey of 100 couples showed the sample mean number of meals eaten outside the home was 3.45 meals per week, with a standard deviation of .75 meals per week.
a) Construct a 99% confidence interval for the population mean.
b) How would the interval change if you lowered the confidence level from 99% to 95%?
If a random student is chosen what is the probability that he or she scores less than 59? What score indicates that the student has to retake the exam?
Select the level of significance, and determine critical, ZCR value.
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? Compute the value of the test statistic.
Find out the p-value associated with test of hypothesis you conducted?
A Pew research poll was conducted to investigate opinions about global warming. The respondents who answered yes when asked if there is solid evidence that the earth is getting warmer were then asked to select a cause of global warming.
Thirty-two samples of 8 items each were collected from a process. The average sample mean is 12 and the average range is 0.10.
A company has random drug test employee numbers range from 1 to6296. Find probability of selecting number less than 1000 and selecting a number divisible by 1000.
Use a calculator or appropriate computer software to verify that, for the preceding data, xbar = 5.1.
A coin with the probability of heads being 0.8 is tossed 4 tim
blaymount amateur dramatic society is staging a play and wants to know how much to spend on advertising. its objective
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
suppose you know there are four letters in a certain password. Also you know three of the four letters but are not certain of the correct order. What is the number of possible passwords you must consider?
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