Questions from Statistics Principles

Q: According to a study done by the Pew Research Center, 39

According to a study done by the Pew Research Center, 39% of adult Americans believe that marriage is now obsolete. (a) Suppose a random sample of 500 adult Americans is asked whether marriage is obso...

Q: According to creditcard.com, 29% of adults do not

According to creditcard.com, 29% of adults do not own a credit card. (a) Suppose a random sample of 500 adults is asked, “Do you own a credit card?” Describe the sampling distribution of /, the propor...

Q: According to a study conducted by the Gallup organization, the proportion

According to a study conducted by the Gallup organization, the proportion of Americans who are afraid to fly is 0.10. A random sample of 1100 Americans results in 121 indicating that they are afraid t...

Q: The Pew Research Center recently reported that 18% of women 40

The Pew Research Center recently reported that 18% of women 40–44 years of age have never given birth. Suppose a random sample of 250 adult women 40–44 years of age results in 52 indicating they have...

Q: Exit polling is a popular technique used to determine the outcome of

Exit polling is a popular technique used to determine the outcome of an election prior to results being tallied. Suppose a referendum to increase funding for education is on the ballot in a large town...

Q: A shipment of 50,000 transistors arrives at a manufacturing plant

A shipment of 50,000 transistors arrives at a manufacturing plant. The quality control engineer at the plant obtains a random sample of 500 resistors and will reject the entire shipment if 10 or more...

Q: A researcher studying public opinion of proposed Social Security changes obtains a

A researcher studying public opinion of proposed Social Security changes obtains a simple random sample of 50 adult Americans and asks them whether or not they support the proposed changes. To say tha...

Q: The human resource department at a certain company wants to conduct a

The human resource department at a certain company wants to conduct a survey regarding worker morale. The department has an alphabetical list of all 4502 employees at the company and wants to conduct...

Q: A researcher studying ADHD among teenagers obtains a simple random sample of

A researcher studying ADHD among teenagers obtains a simple random sample of 100 teenagers aged 13–17 and asks them whether or not they have ever been prescribed medication for ADHD. To say that the d...

Q: Suppose 21% of all American teens (age 13–17

Suppose 21% of all American teens (age 13–17 years) believe in reincarnation. (a) Bob and Alicia both obtain a random sample of 100 American teens and ask each participant to disclose whether they bel...