You select a sample of 50.
Compute the probability the sample mean is :(Round z values to 2 decimal places and final answer to 4 decimal places )
a) Less than 77
b) Between 77 and 79
c)Between 79 and 80
d) Greater than 80
a. Find the z value of this, round to two decimal places.
b. Add areas of z values provided by a and d.
Same with c
d. Standard deviation = 78/sqrt of 50
(80-78)/(78/sqrt of 50)=z value,
Then use the table to find the corresponding value.
Sorry I have an emergency right now. You can ask me any questions you like about this, I have to submit this now or else I will be in bad situation, I hope you understand, thanks.
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