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The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standard deviation of 15 points. Answer the following based on this information:
What percentage of people received a grade between 89 and 95?
Find the probability that on a given shift: (1) Exactly 2 workers will be absent; (2) More than 4 workers will be absent. [Given that e to the power of -3 is equal to 0.04979]
a. Will the total revenue on a day be normally distributed? b. What are the mean and standard deviation of the total revenue on a particular day? c. What is the probability that the revenue will exceed $7,000 on a particular day?
the random sample shown below was selected from a normal distribution.41010741a. construct a 99 confidence interval for
Prepare a bank reconciliation using Bobby Barnacles' Restaurant Supply Inc's information for August 31.
The owner of a local casino. Recently, the operations department proposed to introduce one new gambling game. There are two options. The probability distributions of payout (i.e., the money player will win) for a player in the two options are ..
Compute 95% confidence intervals for the mean BAC before driving for each of the two conditions. (Note that the sample sizes are smaller than may.
a recent national survey found that high school students watched an average mean of 7.5 dvds per month with a
Voters. Suppose that in your city 37% of the voters are registered as Democrats, 29% as Republicans, and 11% as members of other parties.
Test at the 10% significance level whether the average number of boxes of cookies sold by all Girl Scouts in the three-county area is lower than the historical.
Someone suggests classifying a computer as damaged if it fails any of the tests. Discuss the advantages and disadvantages of this test plan.
What equal quarterly deposit should be made into this annuity in order to have $300,000 for college expenses in 15 years?
Is this survey valid or not valid for testing the hypothesis that the proportion of college football players at our university with at least one concussion is less than the national average?
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