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A polling company reported that 27% of 2286 surveyed adults said that they play football.
a. What is the exact value that is 27% of 2286
b. Could the results from part a. be the actual number of adults who played football?
c. What could be the actual number of adults who play football could be ?
d. Among the 2286 repondents, 1479 said they only play hockey. What percentage of respondents said they only play hockey?
You are testing the null hypothesis that there is no linear relationship between two variables, X and Y. From your sample of 20, you determine that SSR = 60 and SSE = 40. Compute the correlation coefficient by first computing r squared and assuming..
prove that the regression r2 is identical to the square of the correlation coefficient between two variables y and x.
In a bag there are 20 marbles. The colors of the marbles are as follows: red - 5; blue - 8; green - 3; yellow - 4.
the unemployment rates for various countries ranges from 4.9 to 10.4 with q1 5.3 median 6.6 q3 7.6 a mean of 6.4 and
a food scientist wishes to study the effect of the type of pan and amount of sodium bicarbonate used in preparing
Construct a 90% confidence interval for the population proportion, p, in order to test the claim from a confidence interval point of view. What is the best point estimate for p?
Does lovastatin reduce the risk of heart attack? Researchers gave lovastatin to 2,325 people and an placebo to 2,081 people. the average age of both groups in 58 years.
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate µ and σ in the formula for the normal approximation to the binomial, and show the final formula you would use without g..
If writing scores for population have standard deviation of σ = 20, does sample give adequate evidence to conclude that new composition course has significant effect?
the fda tests the tobaccos in two different types of cigars for nicotine content in mg and obtained following results.
While dealing with 16 students, suppose that the alternative hypothesis has been one-sided and that it was set as Ha :
The distribution of IQ scores is normal, what proportion of the population would score higher than Bob? Lower than Bob?
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