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A 20-point midterm test results in grades which are normally distributed with a mean of 13 and standard deviation of 3. The professor would like 15% of the class to get A's, 30% to bet B's, 30% to get C's, 15% to get D's and 10% F's. What would be the minimum and maximum scores required for each of these grades?
In order to compare the mean charges for the three groups, the data will be subjected to an analysis of variance. Write the null hypothesis tested by the ANOVA.
Jones Nissan in Sumter, South Carolina, sold 10 Nissans yesterday. What is the probability that exactly 1 vehicles require warranty service?
Use these statistics to construct a 94% confidence interval for the mean monthly consumption for the population of all Ontario households.
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
A suburban hotel derives its gross income from its hotel and restaurant operations. The owners are interested in the relationship between the number of rooms occupied on a nightly basis and the revenue per day in the restaurant.
At the time she was hired as a server at the Grumney Family restaurant, Beth Brigden was told, "You can average at least $20 a day in tips." Over the first 35 days she was employed at the restaurant
Also, assume that X = number among 20 randomly selected coffee purchasers who select a national brand, and that the random variable X follows the binomial distribution.
Find the value of q-hat from proportion and degrees of freedom used to find the t-score.
Your director has banned the use of all artificial fingernails, claiming their use contributes to patient infections in the unit. After multiple discussions the director has allowed you to do a research study to determine if the use of artificial ..
Suppose that a study based on a sample from a targeted population shows that people at a pizza restaurant are hungrier than people at a coffee shop. Make an interference based on the results of the study.
As you know, the percentile for a value is a measure of where that value stands with respect to the rest of the data. As a criterion for college admissions, why would many schools use a percentile value for a standardized test, rather than a raw s..
In a survey about soft drinks it was found that 5% of the respondents like diet soft drinks. 12% of them liked the brand Coke. Of all the Diet soda drinkers 40% liked Coke.
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