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Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear correlation coefficient is 0.936 and the equation of the regression line is Y^=-22.06+1.23x, where x represents the IQ score of the younger child. Also, the 20 x values have a mean of 93.66 and the the 20 y values have a mean 93.4. what is the best predicted IQ score of the older child given that the younger child has an IQ of 91. use significance level 0.05
Norm Dickins the town pharmacist is interested in obtaining a loan to expand his business. He will get a better interest rate if he can reasonably demonstrate that his near-term monthly revenues will be between $10,000 and $15,000.
suppose 80 of the college football fans root for the home team. if 400 fans who attended a college football game last
Committee were chosen from among the workers without regard to gender: Does this represent a binomial random distribution? Why?
1. mention the characteristics of statistics. explain any two applications of statistics.2. distinguish between primary
I have the t-score of 1.660 an a standard error of .036. I hope they are correct, but also need the test effect and test statistic, p-value.
How large a sample is needed to find the population mean within $250 at 99 percent confidence?
Gallup Polls When Gallup and other polling organizations conduct polls, they typically contact subjects by telephone. In recent years, many subjects refuse to cooperate with the poll.
An international marketer has said, "When political instability increases, the price of quality increases." Think about the potential issues with measurements and data collection. Is this a testable hypothesis?
find the diamter of a pipe where p1-p2 is 55 psi and the height rise along the pipe is 60 ft or h2-h1 60 ft the exit
The advertising agency promoting the new Keem dishwashing soap wants to get the best exposure possible for the product within the $100,000 advertising budget ceiling placed upon it.
Sum of shaded area is equal to one. Smoothed histogram or density curve. How we view the "distribution" of a dataset can depend on how much data we have and how it is binned.
Assume that you want to use a 0.05 significance level to test the claim that paired sample data come from a population for which the mean difference is Ud = 0. Find (a) d-, (b) Sd, (c) the t test statistic, and the critical values.
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