Answer:
H0: μ = 5 versus Ha: μ < 5.
Step-by-step explanation:
Given:
μ = true average radioactivity level(picocuries per liter)
5 pCi/L = dividing line between safe and unsafe water
The recommended test here is to test the null hypothesis, H0: μ = 5 against the alternative hypothesis Ha: μ < 5.
A type I error, is an error where the null hypothesis, H0 is rejected when it is true.
We know type I error can be controlled, so safer option which is to test H0: μ = 5 vs Ha: μ < 5 is recommended.
Here, a type I error involves declaring the water is safe when it is not safe. A test which ensures that this error is highly unlikely is desirable because this is a very serious error. We prefer that the most serious error be a type I error because it can be explicitly controlled.
Answer:
multiply 72 times 9
Step-by-step explanation: 648
They are going 279 miles at a rate of 62 mph.
time = distance / speed
time = 279/62
time = 4.5 hrs...or (4 hrs 30 minutes)
plus they plan on a 45 minute lunch...
4 hrs and 30 minutes + 45 minutes = 4 hrs and 75 minutes =
5 hrs 15 minutes. So they need 5 hrs and 15 minutes to get there...and they want to be there by 3.
So they will have to leave at : 9:45 <==
Answer:
yes
Step-by-step explanation:
Answer:
C) Rolling an even number is female and an odd number is male.
Step-by-step explanation:
because it would be an even chance for each sex (Male and female)
Hope this helps
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