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Consider an experiment to determine the effects of alcohol and marijuana on driving ability with Alpha= .05. Fifteen participants were randomly assigned to have alcohol, marijuana, or neither, and were then tested in a driving simulator. The results of the test (scored from 0 to 10) are as follows:
8
a. List the null and alternate hypothesis
b. Calculate the appropriate statistic.
c. Do you reject or fail to rejet the null? Why?
d. Write an APA style conclusion,
e. Calculate the effect size for this relation.
problemthe lake placid town council has decided to build a new community center to be used for conventions concerts and
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There are 6 children in a family. The number of children defines a population. The number of simple random samples of size 2 that are possible equals:
Calculated test statistic at the 5% level of significance and An airline claims that 65% of its flights depart on time.
a national magazine claims that the average college student watches less tv than the general public. the national
Assuming that a difference (Δ) of 2 lbs. in the mean was important to detect, a maximum Type I Error (α) level of 5%, and the desire to run a two-tailed test, then:
Find a 98% confidence interval for the percentage of all eighth graders who have used alcohol. Round the upper and lower bounds to three decimal places.
Find a mean of 24.8 with a standard deviation of 3.1 years. What is the probability that you will find another sample with a mean greater than 24.8 years.
A recent election return indicated that 55% voted for a proposal, 40% voted against it, and 5% abstained. What is the probability that a voter either abstained or voted against the proposal?
Assuming that the dogs did better than what would be expected with random guessing, did they do well enough to be used for actual medical diagnoses? Why or why not?
What is the conditional probability that the down time is longer than 236 days given that it is already longer than 227 days?
An instructor has a test bank consisting of 300 easy true-false questions, 200 difficult true-false questions, 500 easy multiple choice questions and 400 difficult multiple choice questions.
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