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Romance USA Today reported that 11% of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day, what is the probability that,
A. fewer than 40 are romances?
B. at least 25 is romances?
C. between 25 and 40 are romances?
d. In the solution to this problem, what is n? p? q? Does it appear that both np and nq are larger than 5? Why is this an important consideration?
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
Find the value of the standard normal random variable z, called z 0 such that:
Create a scatter plot for those data. Based on scatter plot, how would you explain relationship between the two variable.
The null hypothesis is to be tested at the 10% level of significance. The critical value from the table is:
At the .05 significance level, can we conclude that the guideline is still reasonable?
Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works.
At a large department store, the amount a shopper spent and the shopper's gender (male or female) were recorded. To determine if gender is useful in explaining the amount of money a shopper spends at the store we could
At.01 significance level, is there difference in mean number of times men and women order take-out dinners in month? Determine the p -value?
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
Their resting heart rates were measured. A partial ANOVA table is given.
If the standard deviation is $89.46, find the probability that a randomly selected customer spends between $550.67 and $836.94.
For each problem, compute a Welch F-statistic and determine whether or not significant differences exist among the treatment conditions.
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