Answer:
less
Step-by-step explanation:
Negatives are less than positives. Have a great day! <3
<h2><u>
Answer with explanation</u>
:</h2>
Let
be the average life of light bulbs.
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.
Formula for Test statistic : 
where, n= sample size
= sample mean
= Population mean
=population standard deviation
For
, we have

Using z-value table , Critical one-tailed test value for 0.06 significance level :

Decision : Since critical z value (1.5548) < test statistic (1.6180), so we reject the null hypothesis .
[We reject the null hypothesis when critical value is less than the test statistic value .]
Conclusion : We have enough evidence at 0.06 significance level to support the claim that the new filament yields a longer bulb life
Answer:
Yes
Step-by-step explanation:
They are similiar because the big triangle is a dialated version of the first one
820
Explanation: it is .82x (1,000/15,000)
It’s 27 because u multiple the first 2 number and it’s a negative then add the rest to it