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Overall, the students' class attendance days (per year academic) is normally distributed around 180 days with a standard deviation of 15 days.
What's the probability that the mean number of attendance days will be between 190 and 200?Students that are in the top 5% will receive a 20% off coupon at the "Crazy" cafeteria. What is the minimum number of attendance days that you should have in order to receive such discount?The students at or below the 20%ile of number of attendance days must attend a counseling session with one of the advisers. At least how many attendance days you should have in order to not have to attend such session?How likely (what is the probability) is it to have the number of days attended above 175?How likely (what is the probability) is it that Cri (name not previously mentioned) will have her attendance days between 165 and 205 days?What percentile does an attendance of 220 attendance days rank at?What percentile does an attendance of 180 attendance days rank at?If 9 students (9 = size of the sample) selected randomly attended the school, what's the likelihood that their mean number of attended days will be within 10 days of the population mean? (mean +/- 10).
Suppose that population standard deviation is known to be 10mmHg and samples are from Normal population, test a= 0.01 if blood pressure reading is different from 135mmHg
Construct a 95% confidence interval for the population mean, μ. assume the population has a normal distribution. In a random sample of 26 computers.
There is one Grand Prize of $500, one First Prize of $100, and 8 Second Prizes of $50. Find the expected winnings per ticket sold.
There were 20 students in the class. Develop an ANOVA table for the regression analysis of hours studied as a predictor of the grade earned on the first statistics exam.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcox on rank-sum test, evaluate the significance of the results, assuming there are no ties.
Tourism is one consideration for CoffeeTime's future, A survey of 1,233 visitors to mumbai last year revealed that 110 visited a small cafe during their visit.
A box in a certain supply room contains four 40 w light bulbs, five 60-W bulbs, and six 75-W bulbs. If two are randomly selected from the box and at least one of them is found to be rated 75-W.what is the probability that both of them are 40- W bu..
Assuming the distribution of the salaries is normal, what is the probability that the average for this sample is between $36,000 and $42,000?
Sales manager wishes to award sales representatives who earn the largest commissions a bonus of= $1,000 .He can award bonus to 20% of representatives. Determine cutoff point between those who earn bonus and those who don't?
At a .10 level of significance, use Stat Tools (or Excel) to test the sponsors' hypothesis. State the null and the alternative hypotheses and the decision rule. Finally, discuss your findings.
What is the difference between strong negative and strong positive correlation? What does zero correlation tell you? Can you share a relationship between two variables that is typically negative?
An estimated population variance of 200. a.) What is the standard deviation of the distribution of differences between means? b.) What is the mean? c.) What will be its shape?
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