Exam 10: Only the Lonely

If you have designed a 99% confidence interval to estimate the population average (?) with a known standard deviation for the populationstandard deviation for the populationstandard deviation for the population (?), what is supposed to be the correct critical values range for z?

Excel can apply the Z tests to data arranged in rows or in columns, but the statistical packages present the results typically by.

When analyzing data types what type of chance should each individual have for being selected?

A test is conducted for H?: ? = 34, with ? = 5. A sample size of 100 is selected. Calculate the standard error of the sampling distribution.

Given the symmetry of the normal distribution, if AVERAGE(array)µ₀ , then the ZTEST will return a value greater than?

The primary purpose of a Z TEST is?

If n > 30, what should the distribution be?

Given that it is impossible to compute all the possible means, what is the best estimate that can be used?

A test is conducted for H?: ? = 20, with ? = 4. A sample of size 36 has $\bar { X }$ = 21.4. Calculate the Z Test.

If z represents the test statistic used which results in z=2.05, p<.05 what does this result indicate?