12 terms

Statistics Practice Exam 1

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A division I men's basketball coach is tracking player eligibility. He records each player's credits
earned, the number of class absences each player has, and each player's GPA
Credits earned, quantitative, credits; number of class absences, quantitative, days; GPA,
quantitative, scale from 0 to 4
A person's height in feet
Quantitative
The color of your house
Categorical
A magazine publisher mails a survey to every subscriber asking about the timeliness of its subscription service. The publisher finds that only 5% of the subscribers responded. This 5%
represents what?
The sample
A computer network manager wants to test the reliability of some new and expensive fiber-optic
Ethernet cables that the computer department just received. The computer department received 9
boxes containing 30 cables each. The manager does not have the time to test every cable in each
box. The manager will choose one box at random and test 6 cables chosen randomly within that
box. What is the sampling frame?
The one box that was chosen at random from the 9 boxes
At the local college a survey was being done on whether or not the students liked the cafeteria food.
The survey was located in the college newspaper and was to be filled out and sent to the editing
office. Identify the type of sampling used in this example
Voluntary response sampling
A newspaper reporter randomly sampled households by telephone during various times of the
day. The people sampled are within the area of the newspaper's distribution. The newspaper
reporter asked, "Are you patriotic in a time of war or armed conflict?" What, if any, will be the
most noticeable bias for this survey?
Response bias
780 patients suffering from high blood pressure were randomly assigned to one of three groups.
Over a four-month period, the first group received an experimental drug, the second group
received a placebo, and the third group received no treatment. The diastolic blood pressure of each
participant was measured at the beginning and at the end of the period and the change in blood
pressure was recorded. The biggest decrease in blood pressure was for those who received the
drug
Experiment
In a group of 500 women, those who smoked moderately did worse on tests of reaction time than
those who did not smoke. Identify the subjects studied.
Women who smoke moderately and women who do not smoke
An education researcher was interested in examining the effect of the teaching method and the
teacher on the reading level of students with learning disabilities. 257 students with learning
disabilities participated in an experiment. There are four different teachers (Juliana, Felix, Sonia,
and Helen) and three different teaching methods (A, B, and C). Students are randomly assigned to a
teaching method and a teacher. Those who studied with Sonia using method B achieved the highest
scores on a reading test. Identify the subjects studied
Students with learning disabilities
An education researcher was interested in examining the effect of the teaching method and the
teacher on students' reading levels. 257 students participated in an experiment. There were two
different teachers (Juliana and Felix) and three different teaching methods (A, B, and C). Students
were randomly assigned to a teaching method and teacher. At the end of the semester the students
took a reading test on which they received a score out of 20. Students who studied wth Felix using
method B achieved the highest scores. Identify the factor(s) in the experiment and the number of
levels for each.
B) Teaching method (3 levels) and teacher (2 levels)
An education researcher was interested in examining the effect of the teaching method and the
teacher on students' reading levels. 257 students participated in an experiment. There were two
different teachers (Juliana and Felix) and three different teaching methods (A, B, and C). Students
were randomly assigned to a teaching method and teacher. At the end of the semester the students
took a reading test on which they received a score out of 20. Students who studied wth Felix using
method B achieved the highest scores. The person evaluating the results does not know which
teacher or teaching method the students were assigned to.
Single blind