Please help me because I am an incompetent small brain :0
1 answer:
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Answer: c. z = 1.35; Reject the null hypothesis
Step-by-step explanation:
Let be the average life expectancy of its batteries.
As per given , we have
Null hypothesis :
Alternative hypothesis :
Since is right-tailed and population standard deviation is also known, so we perform right-tailed z-test.
Test statistic :
where, n= sample size
= sample mean
= Population mean
=population standard deviation
For , we have
Critical one-tailed test value for 0.10 significance level :
Decision : Since critical z value (1.28) < test statistic (1.35), so we reject the null hypothesis .
[When critical value is less than the test statistic value , we reject the null hypothesis .]
Good morning,
Answer:
(4 , 0)
Step-by-step explanation:
THe vertex of y = (x - 4)² is (4,0).
Look at the photo below for the graph.
:)
Answer:
2x(3x−2)
Step-by-step explanation:
Factor − 4x
− 4x
=2x(3x−2)
Hope this helps!