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There are 4000 mangoes in a shipment. It is found that it a mean weight of 15 ounces with a standard deviation of 2 ounces.
How many mangoes have weights between 14 ounces and 16 ounces?
What is the probability that a randomly selected mango weighs less than 14 ounces?
The probabilities of low, medium and high compliance are 0.3, 0.4, and 0.3, respectively
A rental agent claims that the mean monthly rent, mu, for apartments on the east side of town is less than $725. A random sample of 13 monthly rents for apartments on the east side has a mean of $724
Use the marginal probabilities of school quality, school cost or convenience, and other to comment on the most important reason for choosing a school.
Roberta scored in the 85th percentile on a standardized test of reading ability. What is Roberta's associated z score?
If the computed value for this problem is +2.33, and the level of significance is 0.05, can we conclude that the recall proportions for the two commercials are same?
She then selects a sample of 102 football players and finds that their average math SAT is 460. Use alpha =.01 to perform the appropriate hypothesis test.
At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
Calculate the standard error. With 95% confidence, find out the margin of error?
Company are interested in how a new spaghetti sauce made from green tomatoes (and green in color) will compare to their traditional red spaghetti sauce. They are worried that the green color will adversely affect the tastiness scores.
Using a separate 2 by 2 table, compute predictive value positive and predictive value negative for population of 1,000 drug users.
If a sample of 25 workers found that the average work week is 48 hours, conduct a hypothesis test to determine if there is significant evidence that the length of the average work week has increased? Use alpha=.05
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = . 05, does vehicle type vary by mall location?
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