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You learn the average GRE score of private college graduates pursuing their MPH is 1500 with a standard deviation of 100. You want to determine whether CSU students are equally prepared. You randomly select 100 GRE scores of CSU graduates and find that the mean is 1545 with a standard deviation of 50. Do a hypothesis test to see if this difference is of any real significance at 0.05 . Apply and show all six steps.
The populations must all be normally distributed, what is meant by normally distributed?
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level.
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.
a soft-drink machine is regulated so that it discharges an average of 200 milliliters per cup. if the amount of drink
One state lottery has 300 prizes of $1, 65 prizes of $10, 18 prizes of $75, 6 prizes of $325, 2 prizes of $1000, and 1 prize of $2000. Assume that 32,000 lottery tickets are issued and sold for $1.
The standard deviation was $21,330. At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
A company has established a goal of processing 95 percent of its orders on the same date of receipt. However, only 485 out of 500 orders were actually processed on the same day
What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
Particular cookie will have fewer than 5. What type of probability distribution will most likely be used to analyze the number of chocolate chips per cookie?
At least half the patients are under 15 years old? First, describe how this can be modelled as a binomial distribution with 8 trials, where success is visitor age is under 15 years old and the probability of success is 20 percent.
One sample has a variance of s2=6 and a second sample has a variance of s2=8. If the two samples are the same size (n1=n2), then what is the pooled variance for the two samples?
Alternative C would have fixed costs of $100,000 and variable costs of $15 per unit. Revenue is expected to be $50 per unit. Which alternative has the lowest break-even quantity?
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