random samples

A random sample of the number of students graduating from public institutions of higher learning is shown. At α = 0.05, find the F test value and test the claim that the mean number of students graduating are the same in all parts of the country. => 1.65, same or 2.96, sam..

A random sample of the ages of employees working in the various departments of an organization is shown. At α = 0.05, find the F test value. Is there a significant difference in the mean age of an employee? => 2.99, yes or 2.97, no or 2.97, yes or 2.99, no..

The table gives the random sample of temperatures at three different places during a month. At α = 0.05, find the F test value and can it be concluded that the mean temperatures differ significantly across places? => 5.34, yes or 5.34, no or 3.47, no or 3.47, yes..

A random sample of the number of beds in hospitals of three different states is given. At α = 0.05, find the F test value and test the claim that the average number of beds are the same. => 0.65, same or 0.65, different or 3.37, same or 3.37, different..

The average daily intake of salt by an American is estimated to be less than 12 grams. The average of a random sample of 50 Americans was found as 11.5 grams with a standard deviation of 2.5 grams. Select the proper alternative hypothesis. => H 1 : μ < 12 or H 1 : μ <..

A random sample of 100 similar iron bars manufactured at a factory had a mean diameter of 6.43 mm and a variance of 0.032 mm 2 . Find 95% confidence interval and 99% confidence interval. Which interval is smaller? => (6.40, 6.47) and (6.38, 6.48) and 95% or (6.395, 6.465) and (6..

A survey reported that 12.6% of all working women earned between $5.15 and $6.14 per hour in 1998. From a random sample of 140 working women, it was found that 20 are in such category. Test the survey report at α = 0.01. => z = 0.303, not enough evidence to reject the repo..

A standard notebook is supposed to have on an average, 200 pages, with a standard deviation of 2 pages. From a supply of 2500 notebooks, a random sample of 40 notebooks was taken and found that the mean number of pages in the notebook was 197. State the null hypothesis(H o ) and..

A bag has red, blue, and green balls. A ball is picked and a coin is tossed at random simultaneously. Find the sample space from the tree diagram. => (RH, HT, BH, BT, GH, GT) or (RH, RT, BH, BT, GH, GT) or (RH, RT, BG, BT, GH, GT) or (RH, RB, BH, BT, GH, GT)..

From a random sample of 36 restaurents in a particular city, the average cost per dinner was reported as $26.50. What is the test value if the population mean is $25 with standard deviation of $4.40 and α = 0.01? Can we say that the sample comes from this populat..