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A ski company in Vail owns two ski shops, one on the west side and one on the east side of Vail. Ski hat sales data (in dollars) for a random sample of 5 Saturdays during the 2004 season showed the following results. Is there a significant difference in sales dollars of hats between the west side and east side stores at the 5 percent level of significance? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic and state your conclusion.
A scientist examined the effect of temperature and catalyst on the yield of a reaction. He ran the experiment at both 150° and 200°C with two types of catalyst.
A health and safety committee is to be selected from all the people who work at a local factory. The committee is to consist of four members selected randomly from a list of ten names.
Ryan is planning to finance her college education by selling programs at the football games for her team. there is a fixed cost of $400 for printing these programs, and the variable cost is $3.
Explain the results plot the original data and the fitted regression equations.
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
The prices (in dollars) for a sample of roundtrip flights from Chicago, Illinois to Cancun, Mexico are listed. Find the mean, median, mode, range, Q1, Q2, variance, and standard deviation of the flight prices.
In the accompanying table, the random variable x represents the number of televisions in a household in a certain country. Determine whether or not the table is probability distribution. If it is a probability distribution, find its mean and stand..
The Aloha Banking Co. is studying ATM use in suburban Honolulu. A sample of 30 ATM's showed they were used the following number of times yesterday.
Critically discuss understanding the normal distribution and the factors that affect its shape important in solving business and marketing-related questions?
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
Explain why random samples are preferred to nonrandom samples.
Consider the following two binomial experiments. In a binomial experiment consisting of six trials, how many outcomes have exactly one success and what are these outcomes?
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