Q: If 100 out of 352 people like Pepsi, what percentage of people like Pepsi?

$$\frac{100}{352} \times 100 = 28.4\%$$

Q: Convert the fraction $$\frac{1}{6} to a $$percent.

$$\frac{1}{6} = 0.166... \times 100 = 17\%$$

Question 1

Which of the following best describes a population in statistics?

Accepted Answer

The complete collection of ALL measurements or data being considered.

Question 2

A researcher wants to know the average weight of all students at a university. She collects data from every student. What type of data collection is this?

Accepted Answer

Census

Question 3

Which of the following is a major pitfall when analyzing data?

Accepted Answer

Reporting sample data instead of measuring it

Question 4

A survey finds that 40% of 2,500 people prefer online shopping. How many people is this?

Accepted Answer

$$0.40 	imes 2,500 = 1,000$$

Question 5

Which of the following best illustrates statistical significance?

Accepted Answer

A coin is flipped 100 times and lands on heads 95 times.

Question 6

A study shows that a new exercise program leads to a 25-pound weight loss in a year. Which type of significance does this result most likely have?

Accepted Answer

Both statistical and practical significance

Question 7

Which of the following is an example of a voluntary response sample?

Accepted Answer

Allowing people to choose whether to respond to an internet poll.

Question 8

Convert the decimal $$0.007 to a $$percent.

Accepted Answer

$$0.007 	imes 100 = 0.7\%$$

Question 9

A survey asks, 'Netflix is America’s most watched streaming service. What streaming service do you watch the most?' What is the main issue with this question?

Accepted Answer

It is a loaded question.

Question 10

If 100 out of 352 people like Pepsi, what percentage of people like Pepsi?

Accepted Answer

$$\frac{100}{352} 	imes 100 = 28.4\%$$

Question 11

Which of the following statements is true regarding correlation and causation?

Accepted Answer

Correlation does not necessarily imply causation.

Question 12

Convert the fraction $$\frac{1}{6} to a $$percent.

Accepted Answer

$$\frac{1}{6} = 0.166... 	imes 100 = 17\%$$

Question 13

A survey finds that 0.4% of people prefer a new product. What is this as a decimal?

Accepted Answer

$$0.4 \div 100 = 0.004$$

Question 14

Which of the following is most likely to result in biased data?

Accepted Answer

Using a voluntary response sample.

Question 15

A survey finds that 36% of respondents like a new app. What is this as a decimal?

Accepted Answer

$$36 \div 100 = 0.36$$

Question 16

Which of the following is an example of practical significance without statistical significance?

Accepted Answer

A new medication reduces symptoms by 30% in a small sample, but the result is not statistically significant.

Question 17

Which of the following is a potential issue when using small samples?

Accepted Answer

Results may not be representative of the population.

Question 18

A survey finds that 275% of people like a new product. What is the decimal equivalent?

Accepted Answer

$$275 \div 100 = 2.75$$

Question 19

Which of the following best describes nonresponse in a survey?

Accepted Answer

People who refuse to respond and may have different views than those who do respond.

Question 20

A survey finds that 30% of 3,000 people like math. What percentage of people like math?

Accepted Answer

$$30\%$$

Section 1.1: Statistical and Critical Thinking – Introductory Statistics Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard