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Suppose that an eBay power seller has had an average customer approval score of 83.4 out of a total of 100 points for the past 6 or 7 years. This year, the seller decided to offer free shipping in order to boost the approval score.
The seller offered free shipping to 25 customers for randomly selected products and then collected and reviewed the customers' approval scores. What type of statistical analysis is most appropriate to determine whether the offering of free shipping resulted in a significant increase in approval score?
State the appropriate null and alternative hypotheses. State the critical value rule using the 5 percent level of significance. Calculate your test statistic. Show your calculation. What is your decision regarding the null statement
A person rolls a pair of six-sided dice, which are equally likely to come up any number from 1 to 6. If the person rolls a seven he gets $0.
robert stands three times on a pair of scales in a period of 5 minutes. the first time he weighs 92kg the second time
Population of consumers where 30% of them favored a new product and 70% of them disliked it. If 20 persons are sampled, what are the probabilities of finding: Binomial
Describe the assumptions of normality and homogeneity of variance. When these assumptions are violated, what are your options?
your restaurant serves an average of 23 customers per half hour. what is the probability that during the next half hour
a company that bakes chocolate chip cookies averages 5.2 chocolate chips per cookie. assume that the number of
There are 3 radar stations and the probability of a single radar station detecting an enemy plane is 0.65. What is the probability of 2 stations detecting an enemy plane? Round your answer to nearest hundredth.
1.a sociologist is studying the effect of having children within the first three years of marriage on the divorce rate.
The International Coffee Association has reported the mean daily coffee consumption for U.S. residents as 1.65 cups. Assume that a sample of 38 people from a North Carolina city consumed a mean of 1.84 cups of coffee per day
description of the datasetwe will be using a dataset on neighborhood effects for this assignment.these data are drawn
expected value and consumer choicesconsumers choices are prey to subtle discrepancies that arise in cognitive
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