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Q. An owner of a chain of stores would like to predict weekly sales based on the number of customers who made a purchase. A random sample of 10 stores were selected. The weekly sales are in thousands of dollars. What is the slope, y-intercept and the conclusion based from the data. Customers Weekly Sales --------- ------------ 907 11.20 926 11.05 506 6.84 741 9.21 789 9.42 889 10.08 874 9.45 510 6.73 529 7.24 420 6.12
What is the maximum water producing capacity that the station should keep on line for this hour so that the demand will have a probability of only 0.01 of exceeding this production capacity?
She has a history of being successful at getting a donor on 55 percent of her calls. If June has a quota to get at least four donors each day.
If one person is selected at random, what is the probability that person is Female?
The mean return for the random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Test the null hypothesis: H0: mu = 15% at α = 0.05.
The mathematics SAT scores of the seven students in a mathematics seminar are 533, 553, 578, 586, 619, 626, and 633. Suppose that the student with the score of 533 drops the seminar and is replaced by a student with a score of 765.
A City Survey states that 70 percent of all business owners favor increasing the parking fees. The city has commissioned a random sample of n = 100 business owners.
Convert these four officers' scores to standardized z-values.Do you believe there was adequate reason to question these four exam scores? What suppositions are you making?
A PC manufacturer claims that no more than 2% of their machines are defective. In a random sample of 100 machines, it is found that 5% are defective. The manufacturer claims this is a fluke of the sample.
Given that Z is a standard normal random variable. What is the value of Z if the area to the left of Z is 0.9382?
Obtain the Normal Equivalent Deviates corresponding to the observed values of X and use these to produce a Q-Q plot. Does your plot indicate that these data are consistent with coming from a Normal distribution?
Calculate the Pearson correlation for these data also determine whether there is a significant correlation among attitudes for husbands also wives.
Use of linear regression is a critical tool for a managers decision-making ability - Using a level of significance of .01, is there evidence that the out of state students may be receiving lower grades? Fully explain your answer.
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