A true score variance of O means a reliability of 1 00 0-1 the value cannot be determined with this information.

If no data values are given but the mean and standard deviation is given how do I find the variance with just this information?

what do the mean deviation, variance and standard deviation all have in common? How is this helpful with the calculations of these variabvariables.

the standard deviation however is not squared? don't we have to square those first because SD is variance squared?

Pyramid Lake is on the Palute Indian Reservation in Nevada. The lake is famous for cutthroat trout. Suppose a tells you that the average length of trout caught in Pyramid Lake Is mu = 19 Inches. Howevera survey reported that of a random sample of 46 fish caught, the mean length was overline x =18.6 lnch , with estimated standard s = 2.7 inches. these data Indicate that the average length of a trout caught in Pyramid Lake less than mu = 19 inches? Use a=0.05 Please answer ONLY parts D & E

For her test grades, Gena has a mean = 65 and standard deviation = 25. Patti has a mean = 65 and standard deviation = 5.   For which of the students can you more accurately predict the next test score, and why? Consider the variability of scores.   Who is more likely to do either extremely well or extremely poorly on the next exam, and why?   Explain the reason for adjusting the formula of the standard deviation/variance with n - 1 in the denominator?

Scores on a certain exam are normally distributed with a mean of 90 and a variance of 25. What is the z-value for a score of 80? -2.0 -0.4 1.0 2.0 0.4

suppose the mean is 8 and 1/3 and the population variance is 6 and 8/9 and a>9 x 5 9 a frequency 3 f 2 a=? f=?

A manufacturer of phone batteries determines that the average length of talk time for one of its batteries is 470 minutes.  Suppose that the standard deviation is known to be 32 minutes and that the data are approximately bell-shaped. Estimate the percentage of batteries whose talk time is between 406 minutes and 534 minutes. Estimate the percentage of batteries whose talk time is less than 438 minutes. Estimate the percentage of batteries whose talk time is more than 534 minutes. answer in excel

The F-statistic is a ratio score resulting in a measure of the estimated proportion of variance due to the independent variable. True or false