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Dr. H wants to conduct a statistical test that will show her new medication to be effective in decreasing violence in criminals.
a. What is the null hypothesis?
b. What is the alternate hypothesis?
She statistically shows that her medication decreases violence in criminals, but in actuality, it has no effect.
c. What type of error is this?
d. How could she statistically control for this type of error so that she is less likely to make that error in the future?>
e. Provide an example of the other type of error.
Also, the sample data appear to have a bell-shaped distribution. Construct the 95% confidence interval for the mean time spent on paperwork by all managers.
The hypotheses are as follows: Null Hypothesis: μD ≤ 0, Alternative Hypothesis: μD > 0. From her data, the resesarcher calculates a p-value of 0.0162. What is the appropriate conclusion? The difference was calucated as (after - before).
A promotion campaign is being planned to encourage people to reduce heat in their houses at night. In order to measure the campaign's impact, we want to determine the proportion of people who reduce their heat at night.
How many individuals will it need to sample to achieve this level of accuracy and confidence?
What proportion of observed variation in hardness can be explained by the simple linear regression model relationship between hardness and elapsed time? (Give the answer to three decimal places.)
Use the normal distribution to approximate the following probability: According to the most recent Davenport student profile, 47% of students have children under 17 living at home with them.
Calculate the suitable mean response time from both proposed locations and find out which proposed site must be selected for the new emergency facility.
Twelve cases of leukemia are reported in people living in a particular census tract over a 5-year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer-incidence rates?
For patients over age 80, probability is 0.05 that coronary bypass patient will die soon after surgery, if hospital performs eight such operations, determine the probability of two or more fatalities?
What is a discrete and continuous random variable? What is a probability distribution for a discrete random variable? Please provide examples to illustrate your answer? Please no textbook or internet examples, original examples only.
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
Use the fact that the confidence interval for the mean is in the for x- E to x+ E to compute the sample mean and the mazimal margin of error E.
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