Answer:
d. Twenty-five cars are randomly selected with the new transmission and 25 with the old transmission.
Step-by-step explanation:
A hypothesis test on the difference between the means must satisfy the following conditions
1) the samples must be randomly selected
2) each sample must have a known standard deviation
3) the samples must be independent
4) the samples must be from normal distribution
Hence only part d gives the right answer.
Answer:
(
390
Step-by-step explanation:
Answer:
4567_567189263
Step-by-step explanation:
936578916
The answer is 18.
Show your work: You first need to find 25% of 80. To do that you need to remember that percent means per one hundred. Knowing this you need to do 25 divided by one hundred. This equals 0.25. Now to find the answer you will need to multiply both 0.25 and 80 to find 25% of 80. This will equal 20.
Now you will need to do the same with 10% of 20. 10 divided by 100 = 0.1 and times that by 20 = 2.
That will be how many boys are wearing ear plugs. To get the girls, all you will need is to subtract 2 from 20 = 18.
That’s why there is 18 girls wearing ear plugs.
Answer:
350km
Step-by-step explanation:
If a map has a scale of 1: 500000, then 1 cm on the map is 500000 cm
So 7 cm on the map is 35000000 cm = 350 km