Class indicated a bimodal distribution
What does the following statement mean: The tests results for the class indicated a bimodal distribution with a very large standard deviation for the population. For most teachers such a distribution makes the matter of how to teach very tricky.
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In a given area, the probability that a person is exposed to an advertisement of Simco Paper Company is 0.30. Suppose that six people are randomly chose from among the population area.
If the test value for the difference between the means of two large samples is 2.57 when the critical value is 1.96, what decision should be made?
Suppose that the probability that the student knows the answer to the question is 0.80 and the probability that the student guesses is 0.20. If student guesses, probability of correct answer is 0.25.
If the person from the city is selected at random and it is learned that he/she did not vote, what is the probability that the person is liberal?
Use a 0.05 significance level to determine whether there is suffcient evidence to support the clain that the new balls have bounce heights with a mean different from 92.84 in. Does it appear that the new baseballs are different?
In a batch of 8,000 clock radios 9% are defective. A sample of 15 clock radios is randomly selected without replacement from the 8,000 and tested. The entire batch will be rejected if at least one of those tested is defective. What is the probabil
The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100. (a) Find the credit score that defines the upper 5 percent. (b) Seventy-five perc
A psychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 politic
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