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There are strengths and weaknesses associated with statistical testing. Why is statistical testing important in research?
Assume that the weather is not independent of each other. The probability of tomorrow's wind and rain is 10%. What is your probability of going out tomorrow?
Repeat the analysis of Fisher's twin-conviction data set using a different cell as the reference cell. Do this both using the hyper geometric
A study was done by randomly assigning 200 volunteers with sore throats to either drink a cup of herbal tea or use a throat lozenge to ease their pain.
The probability of dancing at least once that year was 0.077. Why is it not correct to conclude that the probability of flying a kite or dancing was 0.100?
Create a histogram for these ages.- Create a stem-and-leaf plot for these ages. - Create a dotplot for these ages.
Scores on the ACT test have a mean of 21.1 and a standard deviation of 4.8. which is relatively better: a score of 1840 on he SAT or a score of 26.0 on the ACT test? why?
A marketing agency is interested in the buying habits of those who shop online versus those who shop in person. In your discussion post, address each of the following and explain your reasoning as to why you picked the specific scale:
How does your sample compare to this theoretical distribution of sample means and what are the mean, variance, and standard deviation of the observations in your sample?
A random variable X that has pmf given by p(x) = 1/ (n+1) over the range Rx = {0,1,2,...,n} is said to have a discrete uniform distribution. Find the mean and variance of this distribution.
The amount of food consumed by each rat with humidity set at 20% and again with humidity set at 60%. For this study, identify (a)the population and (b) the sample.
Determine whether a marketing campaign to increase spending at a direct marketing retailer has resulted in incremental spend. For this campaign, I have two groups: Test and Control. I mail 75,000 customers (Test group) offering them rewards if they s..
Your CEO notes that the recently published (HCUP) statistics show that the mean length of stay (LOS) for total knee replacement surgery (DRG 468) is 2.7 days for private insurance. Can you reject the null hypothesis with a single sample t-test (two..
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