Question

in a company the number of hours part time workers work in a week is mean = 20 and standard deviation = 6.9.
1) calculate the proportion of workers who work more than 25 hours.
2)given that only 3% of workers worked for less than T hours, find D.
need help immediately. i have an exam tomorrow! thanks

Answer 1

*find T

Answer 2

hello

Answer 3

, 1 ) we can use the standard normal curve

Answer 4

P(X>= 25) , you can change that to a z score and use a table. some calculators you dont have to change to z score