Statistics: Questions
MAT 308 Name:___________________________
Chp 1-2 Test
100 points
In order to receive full credit, please show all work for every problem. You are welcome to use your calculator, book and notes, but please take this test on your own.
1. In your own words, explain what parameters and statistics are and what the difference is between them. Give an example to clarify. (10 points)
2. According to Consumer Reports, a random sample of 35 new cars gave an average of 21.1 mpg.
What is the variable being studied?
What is the implied population?
What is the sample?
Is the variable qualitative or quantitative?
Is the variable discrete, continuous or neither?
(10 points)
3. A national survey asked 1261 US adult fast-food customers which meal (breakfast, lunch, dinner or snack) they ordered.
What is the variable being studied?
What is the implied population?
What is the sample?
Is the variable qualitative or quantitative?
Is the variable discrete, continuous or neither?
(10 points)
4. Consider a completely randomize experiment in which a control group is given a placebo for congestions relief and a treatment group is given a new drug for congestion relief.
What does it mean that the control group was given a placebo? (4 points)
How could this experiment be made into a double-blind experiment? (4 points)
5. Which technique for gathering data (observational study or experiment) should be used for each of the following studies? (4 points each)
The Colorado Division of Wildlife netted and released 774 fish at Quincy Reservoir. There were 219 perch, 315 blue gill, 83 pike and 157 rainbow trout.
The Colorado Division of Wildlife caught 41 bighorn sheep on Mt. Evans and gave each one an injection to prevent heartworm. One year later, 38 of these sheep did not have heartworm, while the other three did.
An ecology class used binoculars to watch 23 turtles at Lowell
Chp 1-2 Test
100 points
In order to receive full credit, please show all work for every problem. You are welcome to use your calculator, book and notes, but please take this test on your own.
1. In your own words, explain what parameters and statistics are and what the difference is between them. Give an example to clarify. (10 points)
2. According to Consumer Reports, a random sample of 35 new cars gave an average of 21.1 mpg.
What is the variable being studied?
What is the implied population?
What is the sample?
Is the variable qualitative or quantitative?
Is the variable discrete, continuous or neither?
(10 points)
3. A national survey asked 1261 US adult fast-food customers which meal (breakfast, lunch, dinner or snack) they ordered.
What is the variable being studied?
What is the implied population?
What is the sample?
Is the variable qualitative or quantitative?
Is the variable discrete, continuous or neither?
(10 points)
4. Consider a completely randomize experiment in which a control group is given a placebo for congestions relief and a treatment group is given a new drug for congestion relief.
What does it mean that the control group was given a placebo? (4 points)
How could this experiment be made into a double-blind experiment? (4 points)
5. Which technique for gathering data (observational study or experiment) should be used for each of the following studies? (4 points each)
The Colorado Division of Wildlife netted and released 774 fish at Quincy Reservoir. There were 219 perch, 315 blue gill, 83 pike and 157 rainbow trout.
The Colorado Division of Wildlife caught 41 bighorn sheep on Mt. Evans and gave each one an injection to prevent heartworm. One year later, 38 of these sheep did not have heartworm, while the other three did.
An ecology class used binoculars to watch 23 turtles at Lowell