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Are podcasts a drain on students' time, or does the information they contain help students do better in school? You collect data on the number of pod - casts each student downloads per month and each student's GPA.
When we calculate regression equations (just as when we calculate cor relation coefficients), it's important to construct a scatterplot first. Let's say that really poor students don't download podcasts very often, maybe because they don't use their computers much at all, and really good students don't download podcasts very often, maybe because they're too busy studying to have time to listen.
Explain how this might present a problem if we calculate a simple linear regression equation to predict GPA from number of podcasts downloaded, and explain how a scatterplot might help us identify the problem.
An HMO is considering a marketing plan targeting patients with chronic diseases to increase the number getting a flu shot. Some preliminary analyses are conducted before implementing such a plan.
the file danish coffee contains a random sample of 144 danish coffee drinkers and measures the annual coffee
a club has 200 members 45 of whom are lawyers 38 of the memebres are liars while 132 are neither lawyers nor liars.
What statistical test would you use to test if the two treatments were equally effective? What statistical program would you use to obtain the results?
Compute the median and store it in the R variable val. Repeat this process 5000 times. You can use the R command for(i in 1:5000) val[i]=median(rbinom(20,6, 0.9)).
This problem related to Basic Statistics and it discuss about computing the mean number of job in line and the mode of the number of jobs in line. The calculations have been given in the solution
Formulate a hypothesis statement and perform the five-step hypothesis testing procedure on the data identified.
Using your experience from previous or current employment, provide a business example where you could use a t-test to assist in a business decision. State the null and alternative hypothesis.
A manager wishes to determine the relationship between the number of miles (in hundreds of miles) the manager's sales representatives travel per month and the amount of sales (in thousands of dollars) per month. Find the equation of the regression..
The number of smokers among 120 randomly selected students will vary from group to group. Explain why that number can be described wit a normal model.
Devise a method for estimating and plotting Bayesian credible regions for the paramters, using your MCMC sample and compute LS estimators of a and b,
a fair coin is repetitively tossed 2n times n is very large. what is the probability for the number of heads to be in
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