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Suppose that the checkout time at a grocery store has a mean of 5 minutes and standard deviation of 2 minutes. Estimate the probability that a checker will serve at least 49 customers during her 4-hourr shift.
Think about a real life situation that follows a linear equation, with the independent variable being years. What would the slope tell you about future years?
Find the probability that the first marble drawn was blue given that the second marble drawn was red and what is the range space RY of this new random variable Y and give the probability distribution of Y in tabular form
Suppose that $532,000 is to be allocated for advertising, research, and investment in the ratio 8:7:4. How much money will be allocated for each?
Why is statistical significance not necessarily of practical important difference to a business decision? Give an example and explain.
The cutoff (or cutoffs), and the score of the sample on this distribution. Then explain your answer to someone who has never had a course in statistics (but who is familiar with mean, standard deviation, and Z scores).
A machine for making nuts is known to create nuts with a standard deviation in size of 0.20mm. A tradesman is required to adjust the machine to make 49mm nuts.
we wish to estimate the mean using a sample size of n = 49. Find the probability that we could be correct within 1kg/m 2 .
When groups are more alike than different, ANOVA assesses the significance of the difference between two groups. When groups are unalike, will findings be more significant?
Develop a 95% confidence interval to estimate the difference in SAT math scores from students in Delaware and New jersey.
1 an engineer is going to redesign an ejection seat for an airplane. the seat was designed by pilots weighing between
describe the assumptions of normality and homogeneity of variance. when these assumptions are violated what are your
A college class believes that the average grade average of psychology students and the average grade averages of biology students are different.
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