BSTAT-2305-003 HW 1 questions well
answered to pass
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. - correct answer ✔✔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
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. - correct answer ✔✔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
An accounting professor wants to know the average GPA of the students enrolled in her class.
She looks up information on Blackboard about the students enrolled in her class and computes
the average GPA as 3.29. - correct answer ✔✔a. State whether the following statement is true
or false. The population is all students enrolled in the accounting class.
answered to pass
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. - correct answer ✔✔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
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. - correct answer ✔✔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
An accounting professor wants to know the average GPA of the students enrolled in her class.
She looks up information on Blackboard about the students enrolled in her class and computes
the average GPA as 3.29. - correct answer ✔✔a. State whether the following statement is true
or false. The population is all students enrolled in the accounting class.
