Answer:
Correct option: (D) <em>H₀</em>: <em>μ</em> = 55 vs. <em>Hₐ</em>: <em>μ</em> < 55.
Step-by-step explanation:
In this case we need to test whether the new high-performance wax price is justifiable or not.
It is provided that the wax needs to be very fast specifically the mean time to finish their standard test course should be less than 55 seconds for a former Olympic champion, for the price to justifiable.
So, to test this a sample of <em>n</em> = 8 champion's times are recorded.
A one-sample <em>t</em>-test will be used to perform the test.
The hypothesis to test this is defined as follows:
<em>H₀</em>: The mean time to finish their standard test course is 55 seconds, i.e. <em>μ</em> = 55.
<em>Hₐ</em>: The mean time to finish their standard test course is less than 55 seconds, i.e. <em>μ</em> < 55.
Thus, the correct option is (D).
To multiply fractions you just multiply straight across for number 5 you would do 4 times 5 which equals 20 that wild be the top number of the fraction. Then 15 times 8 is 120 so that would be the the denominator in the fraction. So it would be 20/120. If you need to simplify the fraction it would be 1/6.
Answer:
-52/7 or 7 3/7
Step-by-step explanation:
-5 is also -35/7
2 3/7 is also 17/7
-35/7-17/7 = -52/7
-52/7 = 7 3/7
0.583 (the 3 is repeating)
Answer:
x=1+2i/2
Step-by-step explanation:
Using the method of completing the square
(2x)²-2(2x)1 +(1)²+4=0
(2x-1)²=-4
taking square root on both sides
2x-1=2i
2x=1+2i
x=1+2i/2
