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A drug company wants to analyze if its new marketing strategy adopted last year is successful is increasing sales. It randomly chooses 49 drugs from its list of products. For each drug, it computes the sales (in million USD) for 2012 and 2013. The summary for the dataset is given below:
Year
Sample mean
Sample variance
Correlation coefficient
2012
20.8
16.8
0.50
2013
32.8
18.2
The company will consider its marketing strategy successful only if the average sales of all drugs that it manufactures increases from 2012 to 2013. Conduct an appropriate test of hypotheses to test the claim that the marketing strategy is successful. Choose the level at 5%.
Construct and interpret a 99% confidence interval for the proportion of all quebec adults who would allow doctor assisted suicide.
To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
Good morning- I had a tutor from TransTutors assist me with this statistics assignment last week and the answer they provided for me was not correct, therefore giving me a grade of 2.7/30. The professor is allowing me to resubmit and has given me ..
indicate whether the data are a time series or a cross section.number of cars sold in a dealership each day in
Compute the p-value and interpret its meaning - Construct a 95% confidence interval estimate of the population mean life of the light bulbs.
The IRS claims that the mean wait time for callers during tax season is at most 7 minutes. A random sample of 11 callers has a mean wait time of 8.7 minutes and a standard deviation of 2.7 minutes. Is there enough evidence to reject the claim at a..
The probability distribution for the possible results of an experiment is given, Determine the mean of the distribution.
Consider a system of three spin-1/2 particles, each havingz-component of magnetic moment equal to±µ. If there is no external magnetic field (B= 0), all spin states are of the same energy and are equally accessible.
The trail was repeated 54 times with 22 correct identifications and 32 wrong identification.
q1. samples of size n 5 are collected from a process every half hour. after 50 samples have been collected we
The Water Authority informs Margaret that for a special fee of $6,000 this year, her farm will qualify for an additional allotment of 600 acre-feet of water. How should she respond?
Our decisions depend on how the options are presented to us. Here's an experiment that illustrates this phenomenon. Tell 20 subjects that they have been given $50 but can't keep it all.
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