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Problem: Nickels falling over. You may feel that it is obvious that the probability of a head in tossing a coin is about 1/2 because the coin has two faces. Such opinions are not always correct. Stand a nickel on edge on a hard, flat surface. Pound the surface with your hand so that the nickel falls over.
Required:
1. What is the probability that it falls with heads upward? Make at least 50 trials to estimate the probability of a head.
a computer retail store has 15 personal computers in stock. a buyer wants to purchase 4 of them. unknown to either the
a doctor studies the side effects of a drug on a male and female. following data was obtained for a random sample of
For a sample of 100 employees, a personnel direc- tor has collected data on x 5 the number of years an employee has been with the firm and y 5 the number of shares of company stock the employee owns. The data are in file XR02044. a. Generate a scatt..
Determine a 95% confidence interval for proportion of all voters in favour of candidate.
Perform a 2-sample t-test to see if the population male and female average salaries could be equal to each other - Since the one and two sample t-test results provided different outcomes, which is the proper/correct apporach to comparing ..
Evaluate how the following situations will affect the demand curve for iPods.(a) Income statistics show that income of 18-25-year-olds have increased by 10 percent over the last year.
the use of a tremendously large sample does not solve the question of quality for an estimator. what problems do you
Same survey showed that average length of time each store was in business in 6 years, with standard deviation of 2.5 years. Which is more variable, number of magazines or number of years?
q1.a study has shown that the interpupillary distance for all adult males is normally distributed with a mean of 65 mm
Standard deviation of $47.11. Use the normal distribution to estimate the percent of homes selling for more than $280.00.
Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim.
Find the 95% confidence interval for the true population mean. Identify the point estimate for mean and margin of error.
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