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The average price of homes sold in the medium size city in Canada in the past year was $220,000. A random sample of 81 homes sold this year showed an average price of $210,000 with a sample standard deviation of $36,000. We wish to determine if there has been a significant decrease in the average price of homes.
find the z-scores for which 12 of the distributions area lies between -z and zuse a comma to separate answers as
The life expectancy of a lung cancer patient treated with a new drug is normally distributed with a mean of 4 years and a standard deviation of 10 months.
Does the normal distribution yield a good approximation of the actual results?
A person has a chance to invest $50,000 in a business venture. If the venture works, the investor will reap $200,000. If the venture fails, the investor will lose his money. It appears that there is about a .50 probability of the venture working. ..
a company is criticized because only 17 of 48 executives at a local branch are women. the company explains that
The city of Laguna Beach operates two public parking lots. The one on Ocean drive can accommodate upto 125 cars and the one on Rio Rancho can accommodate upto 130 cars.
What is the minimum possible time required for completing the project and what is the latest possible time that Activity D may be started without delaying the completion of the project?
Compute the Relative risk (RR) of ADR with Drug A compared to Drug B. Show all calculation. Interpret the RR value. Do you arrive at the same conclusion based on the OR estimate and RR?
If the P-value of a hypothesis test comparing two means was 0.25, what can you conclude? (Select all that apply):
The regression of Y on X predicts? When predicting Y, adding a second predictor variable to the first predictor variable X.
Plot the sample ranges on the R-chart. Analyze the pattern of the R-chart. Based on R-chart findings, is the process under statistical control? Explain and justify your answer
What is the probability that Sara will die in her 60 th year? Using this probability and the $50,000 death benefit, what is the expected loss to Big Rock Insurance?
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