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1. A true-false question is to be posed to a husband and wife team on a quiz show. Both the husband and the wife will, independently, give the correct answer with probability p. which of the following is a better strategy for the couple?
(a) Choose one of them and let that person answer the question; or
(b) have them both consider the question and then either give the common answer if they agree or, if they disagree, flip a coin to determine which answer to give?
Sample from a normal population having a standard deviation of 0.04, what is the probability that the mean of a random sample of size 25 will be "off" by at most 0.02.
1 examine the given statements then express the null hypothesis and alternative hypothesis in symbolic form. be sure to
the average score for 49 teenage boys playing a certain computer game was 75000 points per player. if the standard
In an effort to counteract student cheating, the professor of a large class created four versions of a midterm exam, distributing the four versions among the students in the class.
Explore the descriptive statistics and draw some scatter plots. Does this meet the basic assumptions of regression?
For each of the following three scenarios, state which hypothesis test you would use from among the four introduced so far: the z test, the single-sample t test, the paired-samples t test, and the independent-samples t test.
If a survey of 109 randomly selected united states residents is to be taken, what is the approximate probability that at least 60 will be under 31 years of age?
what can a researcher do to influence the size of the standard error?what can a researcher do to influence the
Null Hypothesis (Ho): There is no significant difference between the population average scores of mathematics among these three groups with different teaching method.
the cardboard bales produced at a local recycling depot have an average weight of 400kg with a standard deviation of
a manufacturer wants to increase the absorption capacity of a sponge. based on past data the average sponge could
Standard deviation of 50. what is the probability that next year the number of burgalaries will be less than 250? less than 300 and more than 350?
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