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Recent medical research demonstrated there is a strong (r=.60) correlation between the excessive weight and incidences of breast cancer. How can we interpret this statement? Can we say that excessive weight is the leading cause of breast cancer? How confident can we be about the strength of the relation between these two variables? Can we conclude that the correlation observed on the sample is also the population correlation coefficient?
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion.
What is the probability that two of absent students were girls.What is the probability that two of absent students were boys.
If you use a 0.10 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean is 500 if you use the Z test?
When we carry out a chi-square test of independence, the expected frequencies are based upon the Null hypothesis - true or false.
Finding the probability value for the given data using normal approximation
What is the rejection point at α = .01 and indicate if you would accept or reject H o ?
The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.
Determine the Midrange. Determine the Standard Variance. Determine the Standard Deviation
Where S, A, and R are measured in dollars per week. Vanguard's marketing director is comfortable using parameter estimates that are statistically significant at the 10% level or better.
Illustrate for what value does probability XYZ will offer a competing product will ABC be indifferent among the alternatives.
Compute the proper measure of association of smoking and lung cancer.
Here are fifty observations on the weight of tea bags. Create mean, mode and median.
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