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Question: A property manager thinks that the average rent for one-bed room flat his city has gone up to AED 6000 per month. He took a sample of 60 flats and found out that the sample mean was AED 6015 and sample standard deviation was 40.
a. Test the claim that the mean rent is 6000 or less (H0 μ ≤ 6000, H1 μ > 6000, α = 0.05, assume
b. Interpret your test results in the context of the problem.
Due to financial hardship, the Nyke shoe company feels they only need to make one size of shoes, regardless of gender or height. They have collected data on gender, shoe size.
What sample size is needed to estimate the proportion of Americans who favor tougher gun control with 95% confidence and maximum error of 3%. Assume past studies indicted that the proportion is around 40%.
Suppose that the following data were obtained for a collection of archaeological sites in New Mexico: Calculate the sample correlation coefficient r.
a search engine site claims that on average one out of five visitors clicks on an ad.a if 8 users visit the site what
The top motivation is for using a credit card. Can you conclude that there has been a chagne in the claimed or expected distribution? Use a =0.025.
Probability of selecting a row with that number of seeds germinating. Determine the standard deviation of the number of seeds per row that germinated.
We wish to compare the average sales in two shops, to see if the population mean of the first one is higher than the second one. One shop had 100 sales averaging $94, with a standard deviation of $40.
Compute a Pearson's correlation coefficient for these data and determine whether the correlation is significant.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
A business operates with 9 locations. Each year, each location is allotted an overtime budget based on the previous years' activity. The total overtime budget for all 9 locations is $10 million.
Does the data prove a significant difference in mean GPAs? GPA1 GPA for Randomly Selected Students in Four Business Majors.
Determine whether the survey figure for urban people is also true for rural people on the basis of the sample data.
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