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You want to rent an unfurnished one-bedroom apartment in Boston next year. The mean monthly rent for a random sample of 11 apartments advertised in the local newspaper is $1200. Assume that the standard deviation is $230. How large a sample of one-bedroom apartments would be needed to estimate the mean? within ±$60with 95% confidence? (Round your answer up to the next whole number.)
How large should the sample be if I want to maintain a 95 percent level of confidence and suffer a maximum error of $2.00 in my estimate of the highest price consumers are willing to pay?
Clark Heter is an industrial engineer at Lyons Products. He would like to conclude whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced w..
A particular bulb is turned on once each evening for an average of 10 hr. If it is desired to have a reliability of 90 percent, what is its design life in days?
mac inc. which was created in 1962 has yielded the following percentage returns on its stock for the last 5 years 13.2
a sample of 36 patients in a doctors office showed that they had to wait an average of 45 minutes with a standard
What is the probability that a customer chosen at random from the company's data base has bought the product and what is the probability that this customer was called and bought the product
Assume that two samples are independent simple random samples selected from normally distributed populations. Use a 0.05 significance level to test the claim that male and female biology students speak the same mean number of words in a day.
a sample of 80 women is obtained and their heights in inches and pulse rates in beats per minute are measured. the
The null hypothesis is that the distribution of mother's educational level is the same for both treatment groups. The value of the chi-square statistic is 7.422. Evaluate the P-value
Show your work (either your hand calculations or your statistical program output). You can either scan your work and submit it as a low-resolution graphic, type your answers directly into the document, or cut and paste your work into a Word file.
Point out your final decision concerning hypothesis test and compute p-value for test.
Using the population standard deviation of 1.4 ounces, find the sample size required if we want our margin of error to be less than 0.25 ounces with 95% confidence.
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