Suppose we are testing the null hypothesis H 0 mu=20 and the alternative H iu =20 , normal population with sigma=6 A random sample of nine observations are drawn from the population, and we find the sample mean of these observations x = 17 The value of the test statistic z is approximatel

The value of the test statistic is

Step-by-step explanation:

The formula for the test statistic is:

In which X is the statistic, is the mean, is the standard deviation and n is the number of observations.

In this problem, we have that:

So

The value of the test statistic is

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!