A set of data with a mean of 45 and a standard deviation of 8.3 is normally distributed. What value is one standard deviation above the mean?
What is 53.3
100
A normal distribution of scores has a standard deviation of 10. Find the z-score of an item 20 points above the mean
What is 2
100
The Boor Foundation conducted a poll asking people to name the most serious problem facing the nation. Of the 600 people polled, 48% of the randomly selected people answered education. Find the margin of error for this sampling.
What is .0407922
100
What decade in the 1800s saw the launch of Heinz's tomato ketchup?
What is 1870s
200
Order the population and then select from it at regular intervals
What is Systematic Sample
200
A set of data with a mean of 45 and a standard deviation of 8.3 is normally distributed. What value is one standard deviation below the mean?
What is 36.7
200
1A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to a value 35 points below the mean.
What is -3.5
200
In a random survey of 600 students in a school, 75% of the students said that they participated in extra-curricular activities. Find the margin of error for the sampling.
What is 0.0353553
200
What team did the Green Bay Packers defeat in Super Bowl II?
What is Oakland Raiders
300
The sample is divided into two groups. A “treatment” is imposed on one group, but not on the control group. The effect of the “treatment” on the treatment is then compared to the control group.
What is Controlled Experiement
300
A machine is used to put bolts into boxes. It does so such that the actual number of bolts in a box is normally distributed with a mean of 106 and a standard deviation of 2.
What percentage of boxes contain more than 104 bolts?
What is 84%
300
On a statistics test the class mean was 63 and the standard deviation was 7, on a biology test the class mean was 23 and has a standard deviation of 3.9. Find the z-score of a grade of 60 in statistics and 20 on the biology test.
What is -.43 and -.77
300
In a recent survey, 56% of the people agreed with choice A. With confidence of 95%, what is the minimum percentage of people in the population who agree with choice A, if the margin of error is 8 %?
What is 48%
300
If a student has earned a 90, 91 , and 88 on each of her first three tests what grade is needed for them to earn an 89?
What is 87
400
systematic error introduced by the sampling method.
What is Bias
400
A machine is used to put bolts into boxes. It does so such that the actual number of bolts in a box is normally distributed with a mean of 106 and a standard deviation of 2.
What percentage of boxes contain between 102 and 112 bolts?
What is 97.5%
400
On a statistics test the class mean was 63 and the standard deviation was 7, on a biology test the class mean was 23 and has a standard deviation of 3.9. Find the z-score of a grade of 60 in statistics and 20 on the biology test. Which grade was better relative to others?
What is Statistics
400
In a poll of 720 likely voters, 358 indicate they plan to vote for Candidate A. Find the confidence interval at 95%.
What is .4572<=p<=.5372
400
Find the z-score given:
µ=30, Sx= 5, and x =39.
What is 1.8
500
A type of survey that divides a population into groups and then picks people randomly from a particular group for the survey or experiment.
What is Stratified Sample
500
The mean of a normally distributed set of data is 52 and the standard deviation is 4. Approximately 95% of all the cases will lie between which measures?
What is 44-60
500
A pharmaceutical company wants to test a new cholesterol drug. The average cholesterol of the target population is 200 mg and they have a standard deviation of 25 mg. The company wished to test a sample of people who fall between 1.5 and 3 z-scores above the mean. Into what range must a candidate's cholesterol level be on in order for the candidate to be included in the study.
What is 237.5-275
500
In a simple random sample of 500 people, 342 reported using social networking. What is the confidence interval?