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Please identify a research question that can be addressed with a hypothesis test. An example might be to identify the presence of bacteria in a batch of milk.
Define your research question as a statement.
What is your measurement parameter?
What is the critical value?
Now express your research question as a null and an alternate hypothesis.
Define the meaning of a Type I error and a Type II error, the meaning in terms of the correctness of your response to the situation. My example might mean we sell milk that contains bacterial contamination and our customers get sick or we incur the huge cost of a recall.
Consider the risk posed by your research question. What level of significance should your choose? Justify your choice in terms of the probability of making a Type I error and the probability of making a Type II error.
The weight for a group of 18 month-0ld girls are normally distributed with a mean of 24.4 pounds and a standard deviation of 2.6 pounds. Use the table to find the percentage of 18 month-old girls who weigh more than 27.8 pounds.
The current advertising campaign for a major automobile brand would be changed if fewer than 70 percent of the consumers like it.
The random variable x, which is the number of occurrences of an event over an interval of ten minutes. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length. It is known that the mean number..
Determine a 95% confidence interval for proportion of all voters in favour of candidate.
In a sample of 1,000 representing a survey from the entire population, 650 people were from Laketown, and the rest of the people were from River City.
I am not understanding how to do this question as I am still trying to grasp an understanding of the material. I came across this question at the end of the chapter:
Scores by women on the SAT-I test are normally distributed with a mean score of 998 and a standard deviation of 202. scores by women on the ACT test are normally distributed with a mean of 20.9 and a standard deviation of 4.6 assume the two tests ..
Which of the following is true about the expected value of perfect information. It is the amount you would pay for any sample study.
A biased coin with probability of head being .6 is tossed 12 times. What is the probability that number of head would more than 4 but less than or equal to 10.
Compute the z score corresponding to each of the following values of x. Compute the z score corresponding to each of the following values of x
Determine the 95% confidence interval for the population mean, based on the sample mean.
The null hypothesis is that the distribution of mother's educational level is the same for both treatment groups. The value of the chi-square statistic is 7.422. Evaluate the P-value
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