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A certain lecture group consists of 225 students. You may assume that this class group forms a simple random sample from the students in the university. Find the probability that the average number of study hours for this group is between 21 and 23 hours.
For the statement: The mean amount of Pepsi in cans is at least 12 oz. Express the null hypothesis and the alternative hypothesis in symbolic form.
As a condition of employment, Fashion Industries applicants must pass a drug test. Of the last 220 applicants 14 failed the test. Develop a 99 percent confidence interval for the proportion of applicants that fail the test.
Give three logically possible directions of casualty, indicating for each direction whether it is a reasonable explanation for the correlation in light of the variables involved (and why).
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
Suppose that January sales for the fourth year turn out to be $295,000. What was your forecast error? If this is a large error, Karen might be puzzled about the difference between your forecast and actual sales value.
Kolzak Appliance has just received a shipment of 10 TV sets. Shortly after they were received, the manufacturer called to report that he had inadvertently shipped 3 defective sets.
Determine the mean, median and mode of those data. Make sure you show your hand computeed work. Is there any indication from this group of data that the new policy holder may lean toward younger ages?
Find out the variance for percentage of tickets? Determine the probability that your sample will have the average between 70 and 75?
Find the test statistic P-value, and critical value, and state the final conclusion.
With your start time being random and uniformly distributed in this interval. What is the PDF of the time that you have to wait for the first train to arrive?
A raffle offers a first prize of $1000 2 second prizes of $300 and 20 third prizes of $10 each. If 15000 tickets are sold at 75 cents each, find the expected winnings (IN CENTS) for a person buying one ticket?
Find the mean, median, mode, variance, standard deviation, frequency table, cumulative frequency table, coefficient of variation, and mean deviation of the population.
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