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The mean television viewing for americans is 15 hour per week (Monday, November 2003). Suppose a sample of 80 Americans is taken to further investigate viewing habbits. Assume the population standard deviation for weekly viewing time is StdDev=5hrs.
A.)What is the probability the sample mean will be within 1 hour of the population mean (to four decimals)?
B.)What is the probability the sample mean will be within 45 minutes of the population mean (to four decimals)?
a trick coin has been weighted so that the probability of heads is 0.8 and the probability of tails is 0.2.a. if you
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
The New York City Housing and Vacancy Survey showed a total of 59,324 rent-controlled housing units and 236,263 rent-stabilized units built in 194 or later.
Describe expected value (EV) of an investment if there is a 20% chance of realizing a return of $20,000 or a 55% chance of realizing a return of $25,000, or there could be a loss of $15,000?
Use any method to decide whether to rejects or fail to reject the null hypothesis. Then interpret the decision in the context of the original claim.
three cards are drawn in succession from a decak without replacement. find the probability distribution for the number
Using hypergeometric distribution, determine the probability that the sample of 6 will comprise 2 nonconforming watches?
1. a box contains 5 green 6 red 2 yellow and 8 blue marbles. four marbles are drawn from the box at the same time.a
Calculate the measures of central tendency, dispersion, skew for your data. Display your descriptive statistical data using graphic and tabular techniques. Frequency distribution, Histogram.
Baseball games are uniformly distributed between 160 minutes and 240 minutes. What is the probability that a 9-inning game will last between 180 and 220 minutes?
the lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. random
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance, is the true mean greater than 10? (b) Use Excel to find the..
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