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A simple random sample of 25 recent graduates from a particular college gives a sample mean starting salary of $24,000 with a sample standard deviation of $3,000. Build a 95% confidence interval for the mean starting salary of all graduates from this college. Interpret your result in words.
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
Using the 0.01 significance level, can we conclude that there is a positive correlation between the variables?
Sixty percent of the families in a certain community own their own car, thirty percent own their own homes, and twenty percent own both their own home and own car. If a family in the community is randomly chosen, what is the probability that they ..
Find the expected value if the cost of entering this sweepstakes is the cost of a postage stamp. Is it worth entering the contest?
Confidence interval for the population mean - Prepare a 99% confidence interval for the population mean.
A certain type of tomato seed germinate 90% of the times. if a farmer plants 25 seed, What is the probability that: -exactly 20 germinates more than 19 germinates.
question ameesha drove car at 80 kmph and missed the flight by 5 min. if she drove at 100 kmph she would have reached
Describe the sampling distribution of the sample proportion
A random sample of 16 federal inmates is selected. What is the probability that exactly 12 are serving time for drug dealing?
question a grocery store is hiring 5 new stock-persons for the summer. 19 equally qualified students apply for the job.
A national Retail Foundation survey found housholds intended to spend an average of $932 during the December holiday season. Assume that the survey included 850 households and that the standard deviation of the sample is $215.
The Minneapolis Star Tribune newspaper has decided to write an article about gasoline prices in the Twin Cities area (Minneapolis and St. Paul).
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