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1. Which statement is incorrect?
a) The null hypothesis contains the equality sign b) When a false null hypothesis is not rejected, a Type II error has occurred c) If the null hypothesis is rejected, it is concluded that the alternative hypothesis is true d) If we fail to reject the null hypothesis, then it is proven that null hypothesis is true 2. If a null hypothesis is rejected at a significance level of .01, it will ______ be rejected at a significance level of .05
a) Always b) Sometimes c) Never
Let ≥ represent the true average area (in square feet) of these apartments. What are the appropriate null and alternative hypotheses?
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
Concept of statistical signi cance
Find the area under the normal distribution curve between z = 1.52 and z = 2.43.
What percentage of population scored between the mean and Jorge?
Make a decision regarding the null hypothesis based on the sample information. Interpret the results of the test and state your conclusion.
Has the average community level of suspended particles for the month of August exceeded 30u/m3?
Assume that you choose a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
The p-value of the test is closest to:
Explain in words general pattern of correlation is statistically important.
What is the probability that Sara will die in her 60 th year? Using this probability and the $50,000 death benefit, what is the expected loss to Big Rock Insurance?
If random sample of size n = 16 are selected, can we say anything about the xbar distribution of sample means?
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