oylermorgan7687
24.11.2020 •
Mathematics
The mean number of hours that American women who worked outside of the home per week was 34.6 hours with a standard deviation of 13.6 hours. If 37 American women who worked outside of the home are randomly selected, what is the probability their mean hours worked per week is between 32 and 36 hours per week
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Ответ:
0.61196
Step-by-step explanation:
When we are given a random number of samples , we solve using the z score formula
z = (x-μ)/σ/√n
where x is the raw score
μ is the population mean = 34.6
σ is the population standard deviation = 13.6
n is the random number of samples = 37
For x = 32
z = 32 - 34.6/13.6/√37
z = -1.16288
Probability value from Z-Table:
P(x = 32) = 0.12244
For x = 36
z = 36 - 34.6/13.6/√37
z = 0.62617
Probability value from Z-Table:
P(x = 36) = 0.7344
The probability their mean hours worked per week is between 32 and 36 hours per week is calculated as:
P(x = 36) - P(x = 32)
= 0.7344 - 0.12244
= 0.61196
Ответ:
g= 2/5 divide 3/5
g= 2/5 X 5/3
g= 10/15
g= 2/3