9514 1404 393
Answer:
43/120 ≈ 0.3583
Step-by-step explanation:
Adding up the folks who use two facilities counts the folks who use all three 3 times. So, the number who use two or more facilities is ...
21 +16 +24 -2(9) = 43 . . . . people who use 2 or more facilities
The probability that a person chosen randomly from the 120 at the sports center uses at least 2 facilities is ...
43/120 ≈ 0.3583
_____
The given numbers add up as follows:
Gym only: 42
Pool only: 18
Track only: 14
Gym and Pool only: 12
Gym and Track only: 15
Pool and Track only: 7
Gym and Pool and Track: 9
No facilities: 3
Y = mx + b
m is the slope, therefore the slope of y=-3x+2 would be -3
Hope this helps you, and good luck on the rest of the problems!
Answer:
The average life of the mice that are placed on this diet is less than 40 months.
Step-by-step explanation:
Consider the provided information.
When 40% of the calories in their diet are replaced by vitamins and protein. Is there any reason to believe that μ < 40.
The null and alternative hypothesis are:
64 mice that are placed on this diet have an average life is 38 months with a standard deviation of 5.8 months.
Therefore,
Use the formula:
Substitute the respective values in the above formula.
Now using the table
The p value is smaller than 0.05 so reject the null hypothesis.
Therefore, the average life of the mice that are placed on this diet is less than 40 months.
250(3)=x, answer would be 750
x=750
1 divided by 138 is roughly .7%. Run it through a calculator, then convert the decimal