data values

A teacher claims that the variance of the final examination scores in her class is larger for male students than for the female students. The data from the final exam for the last semester reveals that the standard deviation of the scores for 30 males is 6.8 and that of 20 females is 4.6...

If the mean of the data 10, 15, x , 18, 12, 20 is 16, then the value of x is : => 31 or 16 or 14 or 21..

30 people were randomly assigned to one of six experimental conditions. At the end of the lecture, a measure of comprehension was obtained. The data is shown here. At α = 0.05, find the test value F A × B and check the interaction of the variables using a two-way ANO..

In an experiment, three drugs were tested to see how much pain relief each provides. Pain relief was rated on a ten-point scale. Five subjects were tested in each group and their data are as shown in the table. At α = 0.05, find the F test value. Can it be concluded that t..

The data corresponding to the number of children of two schools having computers at home is given. Find out the p -value and verify if the mean number of children having computers at home of both the schools differ significantly at α = 0.05. => 0.7188, do not differ or 0.3..

The box-and-whisker plot shows the number of books sold by a shopkeeper in the months of March and April. Which of the following is true for the data? => Middle quartile for the month of April is greater than the middle quartile for the month of March or Upper quartile for the month of Ma..

The data corresponding to the number of leaves taken per year by married and unmarried employees of a company is shown. Find the test value and check whether both the means differ at 99% confidence. Married 50 52 60 46 Unmarried 56 48 62 40 => - 0.243, the means do not differ or..

The frequency distribution represents the data obtained from a sample of computer repairs. The values are the mean time (in hours) between repairs on 80 machines. Mean time between repairs Number of machines 25.5 - 28.5 5 28.5 - 31.5 9 31.5 - 34.5 32 34.5 - 37.5 20 37.5 - 40.5 1..

Find from the given data whether the annual percent salary increase of the CEO of a company is greater than the annual percent increase of the revenue of the company or not at 95% confidence. Give the test value. Revenue 25 14 16 18 10 CEO's salary 11 15 10 9 12 => yes, - 0.254 ..

In a survey the crime investigation department found that in the past 6 years more children were missing compared to adults in the entire state. The data is shown. Can you support the claim at 95% confidence? Give the test value. Children 589 553 525 519 545 585 Adults 365 356 3..