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Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear correlation coefficient is 0.913 and the equation of the regression line is ybar = -15.61 + 1.16x, where x represents the IQ score of the older child. Also, the 20 x values have a mean of 97.05 and the 20 y values have a mean of 97.4. What is the best predicted IQ of the younger child, given that the older child has an IQ of 98? Use a significance level of 0.05.
The best predicted IQ of the younger child is __.
What events occurred in these months that may have caused such an extreme performance in the stock's return and describe and analyze the monthly returns using Stata's statistical and graphics capabilities.
Standard deviation of 19.5. Use a 0.05 significance level to test the claim that the sample comes from a population with a standard deviation less than 23.4.
a brewerys filling machine is adjusted to fill bottles with a mean of 31.2 oz. of ale and a variance of 0.003.
a survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature. construct the
A meat processing plant has processed an average of 100 tons per day for the last several years. Newer processing machines have been installed recently.
Some students see a steady price, while others see regular sales that temporarily cut the price. Students are asked the price they would expect to pay. This is an example of?
Make a worksheet in Excel for your calculations. (b) Make a histogram of the data. Would you be justified in using a parametric t test that assumes normality? Explain.
Find out the range (R), variance (V) and standard deviation (s) for the given set of values:
with three discrete variables 50 states urban and rural and two continuous variables average time 5 types of
the seats were subjected to a safety stress test in which scores were assigned on a continuous scale of 0 to 10.
The number of traffic accidents that occurs on particular stretch roas during a month follows a Poisson distribution with mean of 8.5. Find the probability of observing exactly three accidents of this stretch of road next month.
True or False? Bivariate correlation coefficient always has same sign as b 1 in Y = b 0 + b 1 X.
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