Which of the following components in an ANOVA table are not

Which of the following components in an ANOVA table are not additive (the sum of sub-components is equal to the overall component)? Degrees of freedom Mean squares Sum of squares It is not possible to tell. As an aid to the establishment of personnel requirements, the director of a hospital wishes to estimate the mean number of people who are admitted to the emergency room during a 24-hour period. The director randomly selects 25 different 24-hour periods and determines the number of admissions for each. For this sample, x = 396 and S = 100. Which of the following assumptions is necessary in order for a confidence interval to be valid? The population sampled from follows an approximate t distribution. None of these assumptions are necessary. The mean of the sample equals the mean of the population. The population sampled from follows an approximate normal distribution. A major Blu-ray rental chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is evidence that more than 30% households in the area are equipped with Blu-ray players. It conducts a telephone po11 of 300 randomly selected households in the area and finds that 96 have Blu-ray players. The p-value associated with the test statistic in this problem is approximately equal to 0.005 0.0100. 0.2248. 0.0026. Which of the following would be an appropriate alternative hypothesis? The mean of a population is less than 55 The mean of a sample is greater than 55. The mean of a sample is equal to 55. The mean of a population is equal to 55.

Solution

1.   Mean squares.

2.   The population sampled from follows an approximate normal distribution/

3.   0.2248

4.   The mean of a population is less than 55.