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How many cars must be randomly selected and tested in order to estimate the mean braking distance of registered cars in the US to give a 99% confidence that the sample mean is within 2 ft of the population means. The population standard deviation is known to be 7 ft. Among 724 patients treated with a new medication for ADHD, 72 experienced nausea as an adverse reaction. Use a 0.05 significance level to test the claim that the rate of nausea is greater than the 6% rate experienced by patients treated with a placebo. Does nausea appear to be a concern for those given the new medication? Be sure to include hypotheses, test statistic z, and decision. The population has a mean of 678 and the population standard deviation is known to be 58.3. Use a 0.05 level of significance to test the claim that the sample scores listed below came from the population. Identify hypotheses, test statistic, P-value or critical value, conclusion about the null, and final conclusion that addresses the original claim. 714 751 664 789 818 779 698 836 753 834 693 802 Consider the hypothesis test given by H_0: µ = 530 H_1: µ ≠ 530 In a random sample of 81 participants, the sample mean is found to be x ¯ = 524 and the population standard deviation is σ = 27. Determine the P-value for this test. Is there sufficient evidence to justify the rejection of the null hypothesis at α = 0.01 level?
Explain the rationale for the use of the Code of Measuring Practice when carrying our valuations for rental and insurance purposes and explain the principles involved in calculating the floor area of a retail shop unit for rent review purposes.
You are given an annual time series with 40 consecutive values and asked to fit a fifth-order autoregressive model.
What is the probability that a red ball will be chosen? If we randomly select 5 balls with replacement, what is the probability distributon of x-the neumber of red balls in the sample?
Categorize the events as dependent or independent. Events A and B where P (A) = 0.7, P (B) = 0.8, and P (A and B) = 0.56.
A survey on household income in Northeast NJ area gave the following numbers in thousands of dollars:
Your company sells exercise clothing and equipment on the internet. To design the clothing, you collect data on the physical characteristics of your different types of customers.
Suppose that the probability is 1 in 3,900,000 that a single auto trip in the U.S. would result in the death of the driver. Over a lifetime, an average U.S. driver takes 50,000 trips.
Suppose we wish to conduct a survey of adult US voters about whether or not they intend to vote for an incumbent in congress in the next election. Suppose that we survey 1000 people and 230 say they will.
To select a _________ sample, an intact group of subjects that represent the population is selected.
Suppose we have a population of scores with a mean (μ) of 200 and a standard deviation (σ) of 10. Assume that the distribution is normal. What score would cut off the top 5 percent of scores?
In a survey of 8000 woman, 5431 say they change their nail polish once a week. Construct a 99% confidence interval for the population proportion of woman who change their nail polish once a week. A 99% confidence interval for the population is??
Assume sps professors have the average life normally distributed of 82 years, with population standard deviation of 5 years. Determine percent of sps professors will not live more than 80 years?
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