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The mean grocery bill at a large supermarket is $65, with a standard deviation of $20. If X1, . . . , X45 is a random sample of 45 grocery bills, find an approximate value for P(X <¯ 60).
To estimate the average length of time spent in Barbados by long stay tourists, 150 immigration records were reviewed. The sample produced a mean stay of 8.8 days, with a standard deviation of 6 days.
Two different simple random samples are drawn from two different populations. The first sample consists of 20 people, with 10 having a common attribute.
An election poll reported that a candidate has an approval rating of 54% with a margin of error of 4%. Construct a confidence interval for proportion of adults who approve of the candidate.
The sample variance was s^2=16.0. does the sample show sufficient reason to conclude that the population standard deviation is not equal to 3 at the 0.05 level of significance? use the p-value method.
Develop side by side Box Plots for the grouped data (Main and Branch) for each of the factors, i.e. you should have six side-by-side box plots.
Golf scores. Here are the golf scores of 6 members of a women's golf team in the first two rounds of the National Collegiate Athletic Association tournament.
The standard deviation was $21,330. At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
there are 2 groups of education majors. they are all assigned to study a diverse neighborhood where their internship
Determine the range and the standard deviation of the checking account balances. What do the first and third quartiles show?
the data shown in table are chemical process yield readings on successive days read down then across. construct a
PUBH-6033/8033 - Description of the steps you took to conduct your statistical analyses - explain your results in this section; only report your findings
a) What is the probability of accepting a piece of lumber? b) What is the probability of getting a #2 Grade piece?
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