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Repeat the experiment many times. Here is a probability distribution for a random variable X:
Value of X
-1
2
Probability
0.3
0.7
A single experiment generates a random value from this distribution. If the experiment is repeated many times, what will be the approximate proportion of times that the value is -1? Give a reason for your answer.
in a sample of 1000 fourth grade students the average iq score was 122. the prevailing view is that iq is distributed
1. What is the rejection region for a two-tailed test when α = 0.05?
suppose that two evenly matched teams say team a and team b each with probability.5 of winning any given game make it
Each candy in a paper cup and then obtaining the weight without accounting for the weight of the cup. How can this as a random error and systematic error?
In a certain country, the distribution of the number of cases of tetanus reported during a single month is Poisson with parameter lambda=6.5. If we are going to draw a sample of size 60 from this population and calculate the sample mean, what is t..
1. describe the data that are collected for an independent-measures t test and the hypotheses the test evaluates.2.
What is the population under consideration
for a random sample of 50 measurements on the breaking strength of cotton threads the mean breaking strength was found
Identifying Sampling TechniquesIn Exercises 23-30, identify the sampling technique used, and discuss potential sources of bias (if any). Explain.
You have 4 groups that you are trying to find if there is a difference in any of the population means. In each group there are 7 observations. The given level of significance is an alpha of .005. Your MSA is 6,200 and your MSW is 1,000. Will you r..
The lifetime of a particular brand of computer is exponentially distributed with an average lifetime of 3.2 years. (a) Find the probability that a randomly selected computer of this brand will have failed within 3 years.
Debate if "failing to reject the null" is the same as "accepting the null." Support your position with examples of acceptance or rejection of the null. Next, give your opinion on whether or not a failed t test "proves" the null hypothesis.
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