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Test the claim that the population of kindergarden students has a mean grade point average of 2.25 versus a mean grade point average greater than 2.25. Sample statistics include n=71, x??=2.4, and s=0.6. Use a significance level of ?=0.01.
The test statistic is_______.
The critical value is______.
Seventy new jobs are opening up at an automobile manufacturing plant
the friendly neighbor grocery store has a single checkout stand with a full-time cashier. customers arrive randomly at
If researcher obtains sample mean of M = 88, which combination of factors is most likely to result in rejecting null hypothesis?
How large should the sample size be if she wishes to be accurate within $0.10. A previous study showed that the standard deviation of the price was $.12.
One environmental group did a study of recycling habits in a California community. It found that 73% of the aluminum cans sold in the area were recycled. (Round your answers to four decimal places.)
A sample of 3000 observations has a mean of 82 and a standard deviation of 16. Using the empirical rule, find what percentage of the observations fall in the intervals , and x+/- 1s, x+/- 2s x+/- 3s.
Mean of 950 and a standard deviation of 200. nancy bright's sat score was 1390. what percentage of students have scores more than nancy bright?
A manufacturer of car batteries claims that his batteries will last, on average, 3 years with a variance of 1 year. If 5 of these batteries have lifetimes of 1.9, 2.4, 3.0, 3.5, and 4.2 years
The top food snacks consumed by adults aged 18-54 are gum, chocolate candy, fresh fruit, potato chips, breath mints/candy, Ice cream, nuts, cookies, bars, yogurt, and crackers.
the mean price of a pound of ground beef in 75 cities in the midwest is 2.11 and the standard deviation is 0.56. a
In a raffle, 1,000 tickets are sold for $2 each. One ticket will be randomly selected and the winner will receive a laptop computer valued at $1200. What is the expected value if a person buys one ticket?
a metropolitan school system consists of three school districts-norths south central. the north district contains 25 of
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