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A rental agent claims that the mean monthly rent, , for apartments on the east side of town is less than $675 . A random sample of 18 monthly rents for apartments on the east side has a mean of $661, with a standard deviation of $24. If we assume that the monthly rents for apartments on the east side are normally distributed, is there enough evidence to conclude, at the .05 level of significance, that is less than $675 ?
Perform a one-tailed test.
Null Hypothesis =alternative hypothesis =test statisitc and degree of freedomvalue of test statisticp value
Suppose that each passenger may get out of the elevator at either of the 2nd or the 3rd floor. Note that 8 passengers are different. How many ways may the 8 passengers get out of the elevator?
Determine the chance between 39% and 41% of registered voters in sample are Democrats.
30% of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. find the probability that the number that say they would feel secu..
After a series of training sessions the restaurant determined the average waiting time was 86 min (s- 12 min) assume the population is normal. what % of patrons waited less than 90 min?
In a certain town, 60% of adults have a college degree. The accompanying table describes the probability distribution for the number of adults
Determine the coefficient of determination (Use Megastat or Excel, Tools, Data Analysis, Regression function). Interpret the result.
What are the 3 measures of dispersion/variation in a dataset? How do you calculate each of these 3 measures?
Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for bandage BX-5 was 60 (and was normally distributed).
Packets filled consecutively by the machine. Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.
Construct a 95% confidence interval for the difference in the proportions of women and men who have regular exercise programs.
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha. b) What does your result say about attitude consistency across cities?
A health researcher is interested in determining whether or not the speed at which people walk is related to their cholesterol levels. He picks 100 adult volunteers at random, checks their cholesterol levels, and then times each one while they wal..
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