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A random sample of 26 standard metropolitan statistical areas (SMSAs) was selected and ratio (per 1000) of registered voters to the total number of persons 18 years and over was recorded in each area. The data is given below. At 0.05 significance level, test the research hypothesis that μ, the average ratio, is greater than 675. Test the hypothesis using two approaches: the rejection region approach, and the p-value approach.
730 681 807 747 728 561 696 710 641 848 672 740 818 725 694
894 674 683 695 803 802 497 653 600 729 812
(Hint: since sample size is <30, what do you need to check for testing? Use Minitab to do so)
What is the purpose for post tests? To determine how much difference exists between the treatments.
Suppose that the life expectancy X of each member of a certain group of people is an r.v. having the Negative Exponential distribution with parameter l = 1/50 (years). For an individual from the group in question, compute the probability that
If X is a normally distributed random variable with mean 120 and standard deviation 44, find a value x such that the probability that X will be less than x is 0.56.
an educator wants to determine whether early exposure to school will affect iq. he enlists the aid of the parents of 12
A student has seven books that she would like to place in her backpack. However, there is room for only four books. Regardless of the arrangement, how many ways are there of placing four books into the backpack?
LSAT scores are normally distributed, with a mean of 150 and s = 10.
Explain a few of the following on whatever topic you choose: decision tree, decision stragety, probability, forecasting, linear programming as it relates to work, life or interset.
The probability that merchandise stolen from a store will be recovered is 15%. Suppose a random sample of 8 stores, from which merchandise has been stolen, is chosen. Find the mean μ of this probability distribution.
1. Let X., X2 , • • • , X11 be a random sample from a Poisson distribution with mean 0. Find the unbiased minimum variance estimator of 02.
What null hypothesis would you test to determine that the nature of the impact of contract cost on web development time does not depend on the type of industry?
Determine the z value used to build a 90% confidence interval estimate of the population proportion. Give the positive value answer exactly as found from tables (three decimal places).
suppose a bar buys 10 of these sony tvs what is the probability that the average life time of the bar's tv is less than 19,650 hours.
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