MATH107 Stats Review

question

A lawyer has 38 clients, 20% of whom are business. Find the number of business clients. A) 36 clients B) 8 clients C) 10 clients D) 30 clients
answer

B
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Alex and Juana went on a 120-mile canoe trip with their class. On the first day they traveled 24 miles. What percent of the total distance did they canoe? A) 20% B) 0.2% C) 500% D) 5%
answer

A
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A sample of 120 employees of a company is selected, and the average age is found to be 37 years. A) Statistic B) Parameter
answer

A
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After inspecting all of 55,000 kg of meat stored at the Wurst Sausage Company, it was found that 45,000 kg of the meet was spoiled. A) Statistic B) Parameter
answer

B
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The number of freshman entering college in a certain year is 621. A) continuous B) discrete
answer

B
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The temperature of a cup of coffee is 67.3 degrees Fahrenheit. A) continuous B) discrete
answer

A
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The weight of Bill’s pack as he sets off on a backpacking trip is 48.3 lbs. A) continuous B) discrete
answer

A
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The temperature of eight different plastic spheres. A) nominal B) interval C) ordinal D) ratio
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B
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The sample of spheres categorized from softest to hardest. A) interval B) ordinal C) ratio D) nominal
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B
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Salaries of college professors. A) interval B) nominal C) ratio D) ordinal
answer

C
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Nationalities of survey respondents. A) nominal B) ordinal C) ratio D) interval
answer

A
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Ages of survey respondents. A) ordinal B) nominal C) ratio D) interval
answer

C
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A marketing firm does a survey to find out how many people use a product. Of the one hundred people contacted, fifteen said they use the product. A) experiment B) observational study
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B
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A clinic gives a drug to a group of ten patients and a placebo to another group of ten patients to find out if the drug has an effect on the patients’ illness. A) experiment B) observational study
answer

A
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49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively. A) systematic B) stratified C) cluster D) random E) convenience
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B
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To avoid working late, a quality control analyst simply inspects the first 100 items produced in a day. A) random B) convenience C) cluster D) stratified E) systematic
answer

B
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An education researcher randomly selects 48 middle schools and interviews all the teachers at each selected school. A) convenience B) random C) cluster D) systematic E) stratified
answer

C

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