Ch 1.1 & 1.2 Lesson

You Gov poll consisting of 1,091 US Adult Citizens asking various questions about True Crime. One of the questions, surveyors were able to select their opinion(Agree, Disagree, Not Sure) on true crime content. 63% of Americans say that true-crime entertainment makes people more vigilant and safety-conscious.

What is the population and sample

• •Population: consists of all American Adults

  •Sample: consists of the 1,091 American adults surveyed.

• •The population is the percentage of all American adults believe true crime makes people more vigilant and safety-conscious, is unknown.

• •Sample: consists of all American Adults

  •Population: consists of the 1,091 American adults surveyed.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated last year.

a)all students who attended the college last year

b) a group of students who graduated from the college last year, randomly selected

c) the average cumulative GPA of students who graduated from the college last year

d) all students who graduated from the college last year

e) the average cumulative GPA of students in the study who graduated from the college last year

What is the statistic?

• d

• b

• c

• e

Tags

CCSS.6.SP.B.5B

An insurance company would like to determine the proportion of all medical doctors who have been involved in one or more malpractice lawsuits. The company selects 500 doctors at random from a professional directory and determines the number in the sample who have been involved in a malpractice lawsuit.

What is the sample?

• is the 500 doctors selected at random from the professional directory.

• is the proportion of medical doctors who have been involved in one or more malpractice suits in the sample.

• is all medical doctors listed in the professional directory.

• is the proportion of medical doctors who have been involved in one or more malpractice suits in the population.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Categorical variables are also called:

• Qualitative

• Quantitative

What is an example of a nominal variable?

• levels in high school ( freshman, sophomore, junior, senior)

• marital status

• GPA

• temperature

True or False. Ordinal data is used to establish a ranking order.

• True

• False

Which of the following is a continuous variable?

• number of pets

• height

• customer complaints

• home runs

True or False: The variable ‘RBIs’ is a continuous numeric variable.

• True

• False