# Stat test | stat | umuc

Attached is a 20 question STAT test (pdf) and answer sheet (word doc). All problems must be answered and worked in the word document. Below is an example of some of the questions. This assignment must be completed by 12 noon EST on 10/13/19. Follow the instructions on the test PDF.

Do NOT change to format of the word doc, just answer the questions and show the work.

1. You wish to estimate the mean cholesterol levels of patients two days after they had a heart attack. To estimate the mean, you collect data from 28 heart patients. Justify for full credit.

(a) Which of the followings is the sample?

(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two days ago

(ii) Cholesterol level of the person recovering from heart attack suffered two days ago

(iii) Set of all patients recovering from a heart attack suffered two days ago

(iv) Set of 28 patients recovering from a heart attack suffered two days ago

(b) Which of the followings is the variable?

(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two days ago

(ii) Cholesterol level of the person recovering from heart attack suffered two days ago

(iii) Set of all patients recovering from a heart attack suffered two days ago

(iv) Set of 28 patients recovering from a heart attack suffered two days ago

2. Choose the best answer. Justify for full credit.

(a) The Knot.com surveyed nearly 13,000 couples, who married in 2017, and asked how much they spent on their wedding. The average amount of money spent on was \$33,391. The value \$33,391 is a:

(i) parameter

(ii) statistic

(iii) cannot be determined from information provided.

(b) A marketing agent asked people to rank the quality of a new soap on a scale from 1 (poor) to 5 (excellent). The level of this measurement is

(i) nominal

(ii) ordinal

(iii) interval

(iv) ratio

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