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The average or median quantity of groceries that every client buys in Churchill Grocery Store is $23.50. The population has a positive slant and the standard deviation is not known. Answer the following questions for a sample of 50 clients.
a) If the standard deviation of the sample is $5.00, which is the probability that the average or median of the samples is at least $25.00?
b) Once again, suppose that the standard deviation of the average or median is $5.00. Which is the probability that the average or median of the sample is greater than $22.50 but less than $25.00?
Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
Karefree State University has an enrollment of 18,000. Researchers took a sample of 900 and found 477 students wanted a Field Hockey team. Construct the 95% and 99% Interval estimates for the population proportion.
In how many different ways can 5 songs be arranged if a particular song must be the first on the EP?
Findout the probability value for normal distribution. Illustrate the weight of football players is normally distributed with a mean of 200 pounds also a standard deviation of 25 pounds.
(a) Use the steps of hypothesis testing, (b) figure the effect size for the study; and (c) explain your answers to (a) and (b) to someone who has never had a course in statistics.
If one person is selected at random, what is the probability that person is Female?
How do we decide if the homogeneity of variance assumption is significantly violated?
Determine the distribution of X? Determine its parameters?
Write down the advantages and disadvantages of using computer software for decision making.
What the information do z-scores give that actual heights do no?
Given same values n=20, p=0.6, and x=17, calculate probability of x successes in n independent trails of experiment.
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