<h2><u>
Answer with explanation</u>
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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:
The steps:
- Establishing your current financial state
- Collecting the desired goals
- Analysis of any alternatives
- Develop the alternatives
- Implement the action plan
- Review the plan
Step-by-step explanation:
The steps involved in financial planing are;
- Knowing your current financial state
- Coming up with financial goals
- Determining alternative courses of action
- Evaluating the alternatives
- Creating and implementing the action plan
- Reevaluating and revising the plan
Answer: A. 1.2
Step-by-step explanation:
Given : Sample size : n= 64
Standard deviation: 
The formula to find the standard error of mean is given by :-
Therefore, the standard error of the mean= 1.2
Hence, A is the right option.
Answer:
111
Step-by-step explanation:
Please mark brainliest
Answer:
heart
Step-by-step explanation:
