Vocab/ Mult. Ch.
Vocab/ Mult. Ch.
Free Response
Page 4
Page 5
100
A sample that consists of the entire population
What is a Census?
100
What electrical changes occur in muscles as they get tired? Student subjects hold their arms above their shoulders as long as they can. Meanwhile, the electrical activity in their arm muscles is measured. This is.. A) Observational Study B) Uncontrolled Exp. C) Randomized comparative ex. D) Matched pairs
What is B
100
This phrase is used to describe an observed effect so large that it would rarely occur by chance.
What is statistically significant?
100
This type of random variable requires a fixed number of trials.
What is a binomial random variable?
100
The type of significance test used for the mean of a single population when the standard deviation of the population is unknown.
What is a T test (or T procedure)?
200
To test the effect of music on productivity, workers are observed. For 1 month background music is played, for another month no music is played.
What is a paired sample?
200
The Community Intervention Trial for Smoking Cessation (COMMIT) asked whether a community-wide advertising campaign would reduce smoking. The researchers located 11 pairs of communities that were similar in location, size, eco status... One community in each pair participated in the ad campaign and 1 didn't. This is...
What is Matched Pairs
200
randInt(1,9,3)
What is the calculator command for generating 3 random numbers from 1 to 9?
200
The type of variable where the probability distribution assigns probability as the area under the density curve above a specific interval.
What is a continuous random variable?
200
The formula to calculate the one-sample z statistic.
What is z = (x bar minus mu sub o) divided by (sigma divided by the square root of n) ?
300
The method used for improving the accuracy of a sample.
What is large sample sizes?
300
A nutritionist wants to study the effect of storage time (6, 8, 12 months) on the amy of Vit. C present in freeze dried fruit when stored for these lengths of time. Vit C is measures in mg/100mg of fruit. Six fruit packs were randomly assigned to each of the three storage times. What are TREATMENT, EXPERIMENTAL UNIT, AND RESPONSE respectively?
Specific storage time, fruit pack and amt of Vit C.
300
This experimental design involves the random assignment of units to treatments which are carried out separately within each group of units known to be similar in some way that is expected to affect the responses.
What is block design?
300
Events that have no outcomes in common and can never occur simultaneously, for which the addition rule is used.
What are disjoint events (or mutually exclusive events)?
300
The conditions to use this test include all expected counts be greater than or equal to 1 and no more than 20% of all the expected counts be less than 5.
What is the goodness of fit (or chi-square) test?
400
The design is biased if...
What is when certain outcomes are systematically favored?
400
An experiment to measure the effect of giving growth hormones to girls affected by Turner's Syndrome was carried out recently in Vancouver. All 34 girls in the study were given the growth hormone and their heights were measured at the time the hormone was given and again one year later. No measurements were made on their final adult heights. Which of the following is not problem with the experiment? A) No blinding B) No control group C) Nonresponse Bias D) Insufficient attention to the placebo group?
What is C
400
The 3 basic principles of experimental design.
What are control, randomize, and replicate?
400
The condition involving the population size that must be satisfied to use sigma divided by the square root of n as the standard deviation of a sampling distribution.
What is 'the population is at least 10 times the sample size'?
400
Two of the conditions to be verified for inference about a proportion.
What are the population size be greater than or equal to 10n and n times p hat & n times (1 - p hat) be greater than or equal to 10? (SRS could also be one of the two)
500
Control groups are used in experiments in order to...
What is to control effects of outside variables on the outcome?
500
Refers to the reversal of the direction of a comparison or an association when data from several groups are combined to form a single group.
What is Simpson's Paradox?
500
The five steps of a simulation.
What are state/describe the problem, state assumptions, assign digits, simulate repetition, and state the conclusion?
500
The formula to determine the variance for a discrete random variable with three possible values.
What is sigma sub x squared = (the square of the difference between x sub 1 and mu multiplied by p sub 1) + (the square of the difference between x sub 2 and mu multiplied by p sub 2) + (the square of the difference between x sub 3 and mu multiplied by p sub 3) ?
500
b +/- t*SE sub b
What is the confidence interval for slope beta of a true regression line?
M
e
n
u