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A real estate investor is investigating whether the proportion of properties sold at auctions has declined from last year, when the proportion was 40%. Let p be the proportion of properties sold at auctions this year? a sample of 400 property auctions found that 150 had sold. What is the value of the test statistic to test the hypotheses? Give your answer to 2 decimal places.
In a study about postage tariffs and revenue, the European Economic Community wanted to look at the relationship between the number of postal employees in a country and the amount of domestic mail that was processed. They collected data for six di..
A sample of 350 lenses and found 5 lenses with surface defects. Formulate an appropriate test for the qualification of the polishing machine using an α = 0.05."
Upon reviewing the accounting records from the restaurant, you discover that it grosses roughly $3000 per day on 6 out of 10 days. Determine the estimated probability that the restaurant will gross over $3000:
determined from the test in Part (b) and test the homogeneity of the six response curves. State the conclusion of the test and give the model you have adopted at this stage.
A dietitian investigated whether apples washed in hot water or in cold water turned brown at different rates when exposed to air. She took 13 random apples and cut each in half.
What is the value of the population mean? What is the best estimate of this value?
Carry out a hypothesis test to see if this claim may be refuted. State the null hypothesis and the alternative hypothesis that we would use for this test.
1. acme corporation manufactures light bulbs. the ceo claims that an average acme light bulb lasts 300 days. a
Predict the final average of a student who made an 83 on the first test. Give the value of r and r squared for this model. Interpret the value of r squared in the context of this problem.
A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal?
What is the value of the test statistic and decision? Show step by step on how you obtained your final answer.
Compute the mean, median and mode measures of central tendency for the number of years of work experience. Which measure does the best job of describing central tendency for this variable?
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