A pharmaceutical firm is interested in the efficacy of a new drug and of a standard drug. The research division of the firm randomly selects two groups of volunteers .. | Homework Help
- A pharmaceutical firm is interested in the efficacy of a new drug and of a standard drug. The research division of the firm randomly selects two groups of volunteers. One group is given the new drug and the other group is given the standard drug. Data are recorded on the effects of each drug. Is the research division using dependent or independent samples? Why?
- A production manager wishes to determine if there is a difference in the number of production runs produced by the night shift and the day shift. A random sample of night and day shifts is selected, and the number of production units for each shift is recorded. The following are the results of the same:
nDon't use plagiarized sources. Get Your Custom Essay onA pharmaceutical firm is interested in the efficacy of a new drug and of a standard drug. The research division of the firm randomly selects two groups of volunteers .. | Homework HelpFor $10/Page 0nly
- Find a 90% confidence interval on the difference in the mean number of production units for the two shifts.
- Calculate a 99% confidence interval for part a)
- Compare the length of the intervals of the two confidence intervals obtained in a) and b).
3) Independent random samples were collected from two populations and the following statistics calculated:
Sample 1: n1 = 12, = 10, s1 = 2.04; Sample 2: n2 = 15, = 12, s2 = 1.4
- Find a 90% confidence interval for µ1 µ2 using the pooled estimate of the variance for the populations.
4) A restaurant owner is interested in determining whether there is any difference in the weekly sales of his restaurants at two locations. The weekly sales are normally distributed. The sales, in dollars, for seven randomly selected weeks are:
|Week||Restaurant 1||Restaurant 2|
Using a significance level of .01, is there evidence to support the conclusion that there is a significant difference in the weekly sales of the two restaurants?
We've got everything to become your favourite writing service
Money back guarantee
Your money is safe. Even if we fail to satisfy your expectations, you can always request a refund and get your money back.
We don’t share your private information with anyone. What happens on our website stays on our website.
Our service is legit
We provide you with a sample paper on the topic you need, and this kind of academic assistance is perfectly legitimate.
Get a plagiarism-free paper
We check every paper with our plagiarism-detection software, so you get a unique paper written for your particular purposes.
We can help with urgent tasks
Need a paper tomorrow? We can write it even while you’re sleeping. Place an order now and get your paper in 8 hours.
Pay a fair price
Our prices depend on urgency. If you want a cheap essay, place your order in advance. Our prices start from $11 per page.