I'm pretty sure you just answered your own question, (no hate), but I'm going to take a guess and say 2 hours??
Answer:
Where is the figure
Step-by-step explanation:
Where is the figure
Answer:
0.75
Step-by-step explanation:
300 out of 400 is the same as 3/4.
3/4 converted to a decimal is 0.75.
Answer:
0.1507 or 15.07%.
Step-by-step explanation:
We have been given that the manufacturing of a ball bearing is normally distributed with a mean diameter of 22 millimeters and a standard deviation of .016 millimeters. To be acceptable the diameter needs to be between 21.97 and 22.03 millimeters.
First of all, we will find z-scores for data points using z-score formula.
, where,
z = z-score,
x = Sample score,
= Mean,
= Standard deviation.



Let us find z-score of data point 22.03.



Using probability formula
, we will get:

Therefore, the probability that a randomly selected ball bearing will be acceptable is 0.1507 or 15.07%.