For employees at a large company, the mean number of overtime hours worked each week is 9.2 hours with a population standard deviation of 1.6 hours. A random sample of 49 employees was taken and the probability that the mean number of overtime hours will exceed 9.3 hours was determined. Was the probability a Left-tail, Right -tail or Interval Probability

And we can use the normal table and the complement rule we got:

Step-by-step explanation:

For this case we have the following parameters given:

We select a ample size of n=49. And we want to find this probability:

And for this case is a right tail probability and we can use the z score formula given by:

And replacing we got:

And we can use the normal table and the complement rule we got:

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.