Samples of size 60 are drawn from a large population known to have a mean of 78 and a standard deviation of 12. What proportion of these samples would we expect to have a mean greater than 80? a
0.566
b
0.098
c
Almost none
d
0.434
e
0.901

0.098

Step-by-step explanation: First you’ll need to find the sample distribution mean and standard deviation (which is 78 and 1.55). Then you plug it into calculator using normal approximation cause n is large: normalcdf(80,100,78,1.55)

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

the first one

step-by-step explanation:

just id the test.