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The mean score of the first calculus exam was 81%. The standard deviation was 12%. Find the smallest interval about the mean that contains at least 71% of the scores.
Could you please explain all the steps?
We are intersted in the number of students who prefer brand C cola. identify the distribution of the random variable and the mean,standard deviation.
question a company is interested in estimating the mean number of days of sick leave taken by its employees. the firms
the iqs of 600 applicants of a certain college are approximately normally distributed with a mean of 115 and a standard
when solving for the sample size required to estimate p to within a particular margin of error under what circumstances
Construct a scatter plot of P-RFM and P-HELM. If drawing the plot by hand, use graph paper to ensure accuracy.
The simple coefficient of determination is the proportion of total variation explained by the regression line.
if a gambler rolls a dice twice to get a sum of 10, he wins $10. and if he gets a sum of three, he wins $20. The cost to play the game is $5. What is the expectation of the game?
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
What assumption tests should be used? A fifth grade science teacher want to know if there is a relationship between final exam scores and overall course points after adjusting for a quiz score.
Show the graph of the probability density function for flight time.
A poll of U.S. health professionals revealed 82% would choose the same career. In a hypothesis test conducted at a level of significance of 5%, a P-value of 0.023 was obtained.
Determine the range, variance, and standard deviation for the sample data.
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