Which statement about the values 0.034 and 3.40 are true
1 answer:
Answer:
See Explanation
Step-by-step explanation:
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<em>Since none is provided, I will give a general solution.</em>
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We have: 0.034 and 3.40
Required
The relationship between them
3.40 can be expressed as:
This means that 3.40 is 100 of 0.034
Similarly, 0.034 can be expressed as:
This means that 0.034 is 1/100 of 3.40
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Answer:
Critical value: z = 1.28
The 80% confidence interval for the mean repair cost for the washers is between $46.487 and $82.033.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of
So it is z with a pvalue of 1-0.1 = 0.9, so z = 1.28
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
So
The lower end of the interval is the mean subtracted by M. So 64.26 - 17.773 = $46.487.
The upper end of the interval is M added to the mean. So 64.26 + 17.773 = $82.033.
The 80% confidence interval for the mean repair cost for the washers is between $46.487 and $82.033.