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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.
Same population with a known mean of 1.8 grams. Do the bats appear to be from the same population? You may assume the sample data comes from a population that follows a normal distribution.
State a hypothesis.
probability based on addition rule.a sample of automobile dealerships found that 19 of automobiles sold are silver 22
A wholesaler assures retailer replacement times for TVs normally dist. with mean of 8.2 and s.d. of 1.1. The retailer finds that a random sample of 20 sets from the wholesaler have mean replacement time of 7.6 years.
Of those customers using extra unleaded or premium gas, 60% fill their tanks. What is the probability that the next customer fills the tank?
Create a histogram for the following data of the number of miles from residence to place of employment for 30 randomly selected residents of Middletown County.
The sample mean was found to be 194 pounds with a standard deviation of 11.2 pounds. What percentage of men have weights between 175 and 2235 pounds?
The various measures of central tendency: compare them (how they are similar) and contrast them (how they are different), including specific references to numbers, pictures, and tables derived from the data set.
At 5 % level of significance, does this sample prove violation of the guideline that average patient muts pay no more than $250 out-of-pocket? Is this a close decision?
You took a sample of your expenses for 20 weeks and found that the average is $285 and the standard deviation for the sample is $25. Set up your null and alternative hypothesis for testing whether your cists are different and do the analysis using..
A researcher has reason to believe that, for an experiment with 50 points, a 95% prediction interval would be of width 4. If the researcher wishes to run a more precise experiment that will result in a 95% prediction interval of width 2, then the ..
Calculate the test statistic for testing the null hypothesis. The slass mean will be not be signfically different from the population mean. What is your decision about the null hypothesis?"
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