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A random sample of n1 = 157 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 8 were found to be high school dropouts. Another random sample of n2 = 138 people ages 16 to 19 were taken from Sweetwater County, Wyoming, and 11 were found to be high school dropouts. Do these data indicate that the population proportion of high school dropouts on Oahu is different (either way) from that of Sweetwater County? Use a 1% level of significance.
a) What is the level of significance?
b) What is the value of the sample test statistic? (Test the difference p1 - p2. Do not use rounded values. Round your final answer to two decimal places.)
c) Find (or estimate) the P-value. (Round your answer to four decimal places.)
A random sample of 50 households revealed a mean of $112,000 and a standard deviation of $40,000. What is the standard error of the mean?
A game involving a pair of dice pays out $4 with probability 16/36, costs you $2 with probability 14/36, and costs you $6 with probability 6/36.
An SRS of 100 of a certain popular model car in 1993 found that 20 had a certain minor defect in the brakes. An SRS of 400 of this model car in 1994 found that 50 had the minor defect in the brakes. Let p1 and p2 be the proportion of all cars of t..
A. Determine the regression equation. B. Determine the estimated sales if 40 contacts are made.
Find the probability that 4 of the 5 committee members belong to a union.Find the probability using hypergeometric distribution.
Mean=63.6 Standard deviation=2.5 If 36 data points are arbitrarily chosen, determine the probability that mean is less than 64.
What is your conclusion regarding null hypothesis?
Finding the probability selecting a defective item from a collection of items using tree diagram
Findout the margin of error for this survey if we want a 99 percent confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
At the .01 significance level, can we conclude that there is more variation?
Analysis of data sets assignment
Determine the mean number of times the machine was used per day.
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