a file is 284 megabytes is being downloaded. If the download is 15.3% complete how many megabytes have been downloaded
1 answer:
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Answer:
The margin of error is 370.8.
The 90% confidence interval for the population mean is between $167.2 and $908.8
The correct interpretation is that we are 90% sure that the true mean price for all cellphones in within the interval end-points, so option B.
Step-by-step explanation:
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 6 - 1 = 5
90% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 5 degrees of freedom(y-axis) and a confidence level of . So we have T = 2.0150
The margin of error is:
M = T*s = 2.0150*184 = 370.8.
In which s is the standard deviation of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 538 - 370.8 = $167.2
The upper end of the interval is the sample mean added to M. So it is 538 + 370.8 = $908.8
The 90% confidence interval for the population mean is between $167.2 and $908.8
The correct interpretation is that we are 90% sure that the true mean price for all cellphones in within the interval end-points, so option B.
The first step for solving this expression is to write the division as a fraction.
× m³
Factor out 2 from the numerator (top) of the fraction.
× m³
Reduce the fraction with 2.
(-2
+ 
- 7
)m³
Lastly,, distribute m³ through the parenthesis to get your final answer.
-2
+ 
- 7
Let me know if you have any further questions.
:)
Factor out 2 from the numerator (top) of the fraction.
Reduce the fraction with 2.
(-2
Lastly,, distribute m³ through the parenthesis to get your final answer.
-2
Let me know if you have any further questions.
:)