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Let X~N(2,6) and Y~N(-3,2) and Z~N(0,1). All three random variables are independent of each other. Do the following.
a. What is the distribution of W=X+Y+Z? What are E(W) and Var(W)?
b. What is the distribution of Q=2Y?
c. What is the distribution of P=-2X+4?
d. Find a and b so that M=a+bX is distributed as a standard Normal Distribution?.
835 elderly people are sampled and .086 are diabetic. With a 90% confidence interval find the proportion of elderly people..0575-.1145
1.) The mean number of English courses taken in a two-year time period by male and female college students is believed to be about the same. An experiment is conducted and data are collected from 29 males and 16 females. The males took an average of ..
What type of variables you have. Qualitative or Quantitative and indicate what type of measurement scale is being used.
Last year, at Northern Manufacturing Company, 200 people had colds during the year. One hundred fifty-five people who did no exercising had colds, and the remainder of the people with colds were involved in a weekly exercise program. Half of th..
What kind of experiment
A researcher wishes to estimate, with 95%confidence, the population proportion of adults who think the president of their country can control the price of gasoline. Her estimate must be accurate within 55%of the true proportion. a) No preliminary est..
ANOVA and Factorial Designs
Refer to "The Use of Electro-Acupuncture in Conjunction with Exercise for the Treatment of Chronic Low-Back Pain" by Yeung, Leung, and Chow. Examine the question the researchers were trying to answer and write an essay (500-750 words) that explains w..
question 1 a normal population has a mean of 78 and a standard deviation of 6. you select a sample of 50. evaluate the
Expansion Plan Demand Growth
Discuss the level of measurement, assumptions that can be made, statistics that can be calculated from these data, and the general quality of the data
3. hypothesis testing 15 marks should the cbc hire celebrities for their movies? to answer this question run a
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