SHORT ANSWER QUESTIONS 11. In which of the following situations would you use de
ID: 3318207 • Letter: S
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SHORT ANSWER QUESTIONS 11. In which of the following situations would you use descrigtive statistics, a confidence interval, a test of hypothesis or a regression analysis Your decision should be based only on the information provided. State ONE statistical technique perpar You will use each choice ONCE and only once. No justification or support is needed when answering these questions a Decide if the average weekly sales have increased significantly this year b Predict the average starting salary for a new employee based on the employee's GPA Predict the number of open positions avalable at the f irmigovernment agency c d Provide a report on parking space demands by students faculity and staff 12 a What is sampling error? Give a definition NOT examples and NOT synonyms b WHY should any statistical prediction or decision take into account sampling error? 1 do not want the defin of sampling error, as that was the question in a Your answer must reference the why NOT the 'howExplanation / Answer
11) (a) This is a Hypothesis test.
(b) This is an example of regression analysis.
(c) In this we use a confidence interval.
(d) In this we use descriptive statistics.
11) (a) Most of the times in statistics we look at the sample that we take rather than looking at the values from the entire population. The sampling error is therefore the difference between the sample statistic and the actual population parameter that we use to estimate the population parameter (which is mostly unknown eg. mean and standard deviaion).
(b) Any statistical prediction or decision should take into account the sampling error to prevent sampling bias that arises from sampling the part of the population. To ensure accuracy of the test statistic we use sampling error.
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