BSTAT-2305-003 HW 1 questions well
answered graded A+ passed
a. State whether the following statement is true or false. The population is all iPhone 4 users.
True
b. Does 2% denote the population parameter or the sample statistic?
Sample statistic - correct answer ✔✔It came as a big surprise when Apple's touch screen iPhone
4, considered by many to be the best smartphone ever, was found to have a problem (The New
York Times, June 24, 2010). Users complained of weak reception, and sometimes even dropped
calls, when they cradled the phone in their hands in a particular way. A quick survey at a local
store found that 2% of iPhone 4 users experienced this reception problem.
a. Choose the relevant population and the sample.
The population is all elderly people.
The sample consists of 949 elderly people.
b. Do the numbers 22% and 17% represent population parameters or sample statistics?
Sample statistics - correct answer ✔✔Research suggests that depression significantly increases
the risk of developing dementia later in life (BBC News, July 6, 2010). In a study involving 949
elderly persons, it was reported that 22% of those who had depression went on to develop
dementia, compared to only 17% of those who did not have depression.
a. State whether the following statement is true or false. The population is all students enrolled
in the accounting class.
True
answered graded A+ passed
a. State whether the following statement is true or false. The population is all iPhone 4 users.
True
b. Does 2% denote the population parameter or the sample statistic?
Sample statistic - correct answer ✔✔It came as a big surprise when Apple's touch screen iPhone
4, considered by many to be the best smartphone ever, was found to have a problem (The New
York Times, June 24, 2010). Users complained of weak reception, and sometimes even dropped
calls, when they cradled the phone in their hands in a particular way. A quick survey at a local
store found that 2% of iPhone 4 users experienced this reception problem.
a. Choose the relevant population and the sample.
The population is all elderly people.
The sample consists of 949 elderly people.
b. Do the numbers 22% and 17% represent population parameters or sample statistics?
Sample statistics - correct answer ✔✔Research suggests that depression significantly increases
the risk of developing dementia later in life (BBC News, July 6, 2010). In a study involving 949
elderly persons, it was reported that 22% of those who had depression went on to develop
dementia, compared to only 17% of those who did not have depression.
a. State whether the following statement is true or false. The population is all students enrolled
in the accounting class.
True
