Question:

Use this excel file as it has the numbers in it:

https://secure.parsa.com/index.php/s/xHPtjo4GjeMm3tN

(Make sure you keep at least 4 deCImaI places throughout your calculations.) The Screw Right Company claims that their 3/4 inch screws have the mean diameter of 0.753 inches. The data are stored in ScrewsRC.xlsx file. Calculate the sample mean and the sample standard deviation. Based on the sample data, the probability of getting a random sample of 50 screws where the sample mean is the observed number or less is _________ . O a) 0.0014 0 b) 0.0079 O c) 0.0004 0 d) 0.0022 0 e) 0.0098