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The cost of one serving of peanut butter ( in cents) for a random sample of 19 jars of peanut butter was found to be:
22
27
32
26
19
16
14
21
20
17
12
9
a) Give the five-number summary( low, q1, median, Q3, high).
b) Calculate the IQR
Explain the results plot the original data and the fitted regression equations.
A random sample of 36 days yielded the average daily output of 890.2 tons, with standard deviation of 19.8 tons. Use this information to make a 95% confidence interval for mean.
Describe what you find then produce an ANOVA for the problem.
Records also point to that interviewing committee of bank officers approves 85% of individuals they interview. Determine probability that Ann's loan request is approved.
A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
Should Katie conduct a between-subject ANOVA or a within-subject ANOVA? Describe your answer.
When the level of confidence and sample standard deviation remain the same, a confidence interval for a population mean based on a sample of n = 100
Key Refining decided to send a special financing plan to charge account customers having the highest 10 percent of the money charges. What is the dividing point between customers who receive the special plan and those who do not.
If is the proportion of the next 100 shoppers that buy a packet of the crackers after tasting a free sample, then the probability that fewer than 30% buy a packet after tasting a free sample is approximately.
If a group is chosen from a population on the basis of sharing the same percentages of trait features as known to exist in the population, then the group so chosen would constitute:
The study does not give sufficient evidence to support the claim that less than 75% of college students spend less than $250 per semester on textbooks.
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