Answer:
a) P=0.019
b) P=0.263
c) P=0.794
Step-by-step explanation:
We assume that the poll gives the population's proportion of respondents said that their jobs were sometimes or always stressful (p=0.8).
Then, a sample of size n=190 is taken.
The sample mean is:
The sample standard deviation is:
The probability that 140 or fewer workers find their jobs stressful is:
Note: a correction for continuity is applied.
The probability that more than 155 workers find their jobs stressful is
The probability that the number of workers who find their jobs stressful is between 145 and 158 inclusive is:
Answer:
16
Step-by-step explanation:
To solve this equation you need to do the opposite to factor everything out. Since the 6 is being multiplied you need to divide it by 6 and whatever you do to one side you do to the other:
48=1/2b(6)
6÷6=1
48÷6=8
8=1/2b
Multiplying by 1/2 is the same as dividing by 2. So what we want to do is multiply by 2:
8=1/2b
1/2×2=1
8×2=16
16=b meaning you base is 16
To check your answer you can put 16 in as b
48=1/2(16)6
48=1/2(96)
Remember multiplying by 1/2 is the same as dividing by 2:
48=48
-2(7-y)+4=-4
Distributive property for -2(7-y)
-14+2y+4=-4
Addition property
-14+14+2y+4=-4+14
2y+4=10
Subtraction property
2y+4-4=10-4
2y=6
Division property
2y/2=6/2
Y=3
#1 is 65 by 75, next is 3 by 9, and the last is 75 by 25
