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Q1) On standardized test of mathematical ability, Jorge scored 45 and Lisa scored a 39. Distribution of test scores for population is normal, with mean of 30 and a standard deviation of 5.
a) What percentage of population score higher than Jorge?
b) What percentage of population scored lower than Lisa?
c) What percentage of population scored between the mean and Jorge?
d) What percentage of population scored between the mean and Lisa?
Test the overall significance of the regression model at α = .05 level. Please use the six-step hypothesis-testing framework we employed in class, and write out the last three steps in this table:
the population mean of monthly wages of all college graduates under age of 30. Interpret your answer in the context of the problem.
A coin is flipped e times and heads (h) or tails (t) are recorded:
Suppose that the number of babies born during an hour at a hospital's maternity wing follows a Poisson distribution with a mean of 4 per hour.
According to Advertising Age, average base salary for women working as copywriters in advertising firms is higher than average base salary for men. The average base salary for women is $67,000 and the average base salary for men is $65,500 (Workin..
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
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Assume that preparation D was a placebo. Use the Scheffe's procedure to compare the average response of A, B, C, and E to the response for D.
36 values given here are based on summary statistics from research by cumming. Do you think that these data are normally distributed?
Given that the student you choose is a senior, find out the probability of selecting a non-senior?
Compute the score based on their appropriate class means and standard deviations:
Determine a 95 percent confidence interval for the population mean.
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