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Can you please assist, preferably without using excel for explanations!
Americans shop for groceries week after week. A website builder from Texas has developed a new approach to increase sales by decreasing the time people spend visiting the grocery stores by creating an online grocery website. To minimize the risk of loosing customers online, the owner of the business requests a test of the new marketing strategy, for a small unimportant segment of her market. In one week test, 36 people spent an average of 15 minutes visiting her site with a standard deviation of 5 minutes.
1 per cent produced by Machine 2 were defective. If an item selected at random is found to be defective, what is the probability that it was produced by Machine 2.
What happens to the confidence interval and the power of the test at a particular point of interest
Determine the confidence interval for population mean and the Superintendent wants to determine the average amount of hours per week the student population studies at home.
Use Chebyshev's theorem to find what percent of the values will fall between 120 and 150 for a data set with mean of 135 and standard deviation of 7.5.
Two coins. In a drawer are two coins. They look the same, but one coin produces heads 90% of the time when spun while the other one produces heads only 30%.
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
Is it reasonable to compute that the mean of the population is actually $15,000.
Suppose that a sample of size 69 is drawn from a population with mean 95 and standard deviation 65 . Find the value of , the mean of the distribution of sample
Consider the ISTEP scores (see Exercise 3.86), which we can assume are approximately Normal, N(572, 51). Give the z-score for a student who received a score of
a study involving ten people wants to compare the effectiveness of two different brands of antihistamines with regard
Find the probability that the randomly chosen marble is: a. red P(red)=. b. white P(white), and c. blue OR redx P(red OR blue). SHOW WORK
Birds in the trees Researchers studied the behavior of birds that were searching for seeds and insects in an Oregon forest.
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