In a study, it was estimated that the average annual expenditure on take-out was Php 75000 for Filipinos age 25 an bove. Suppose this estimate is based on a sample of 65 respondents and that the sample standard deviation is Php 0,000. At 95% confidence, what is the standard error and margin of error? - What is the 95% confidence interval for the population mean amount spent on take-aways? Based on answer in (a) if our set Margin of Error is 5000, do we need a larger sample size?

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show the complete solution and capture your image well.
Note/Hint: within 1 unit from is also same as saying 1 unit of – this means 1 unit above and 1 unit below.
For the z-values – use the set of z-values for the 90%, 95% and 99% confidence level, all else use that
For Hypothesis testing, always show the 5 steps.
Excel's
Transcribed Image Text:Note/Hint: within 1 unit from is also same as saying 1 unit of – this means 1 unit above and 1 unit below. For the z-values – use the set of z-values for the 90%, 95% and 99% confidence level, all else use that For Hypothesis testing, always show the 5 steps. Excel's
) In a study, it was estimated that the average annual expenditure on take-out was Php 75000 for Filipinos age 25 and
above. Suppose this estimate is based on a sample of 65 respondents and that the sample standard deviation is Php
20,000.
a. At 95% confidence, what is the standard error and margin of error?
b. What is the 95% confidence interval for the population mean amount spent on take-aways?
c. Based on answer in (a) if our set Margin of Error is 5000, do we need a larger sample size?
d. If the amount spent on restaurants is skewed to the right, would you expect the median amount spent to be greater
or less than Php 75000?
Transcribed Image Text:) In a study, it was estimated that the average annual expenditure on take-out was Php 75000 for Filipinos age 25 and above. Suppose this estimate is based on a sample of 65 respondents and that the sample standard deviation is Php 20,000. a. At 95% confidence, what is the standard error and margin of error? b. What is the 95% confidence interval for the population mean amount spent on take-aways? c. Based on answer in (a) if our set Margin of Error is 5000, do we need a larger sample size? d. If the amount spent on restaurants is skewed to the right, would you expect the median amount spent to be greater or less than Php 75000?
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