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A sample survey interviews an SRS of 265 college women. Suppose (as is roughly true) that 71% of all college women have been on a diet within the past 12 months. Using Normal approximation, what is the probability (±0.001) that 76% or more of the women in the sample have been on a diet?
Any person who is familiar with these trees understand the height of a California redwood tree which is related to another characteristics of the tree.
What is the probability the average of the sample is more than $38000 and What is the standard deviation of the sample mean
The times for 300 college students of introductory statistics to complete a one-hour times exam.
Find out coefficient of correlation between variables. Interpret the value.
Assuming a linear cost relationship, what are the regression coefficients, b0 and b1?
Describe a hypothesis upon which the manufacturer might wish to conduct a test concerning the relative effectiveness of the new fertilizer.
Use a 0.05 significance level to test the claim that unfiltered king-size cigarettes have a mean tar content greater than that of filtered 100 mm cigarettes.
Five test vehicles of each kind were crashed, with results given below. Research question: Are mean crash damages the same for these 3 vehicles?
Determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
In a regression analysis, if a new independent variable is added and R-squared increases and adjusted R-squared decreases precipitously, what can be concluded?
Find the standard error of the difference in sample means,
The final grades for a random sample of MKT 380 students are as follows: What is the standard deviation for these data?
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