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Health professionals are often concerned about our lifestyles and how they affect our well being. A group of medical researchers knew from previous studies that in the past, about 39% of all men between the ages of 45 and 59 were regularly active. Because regular activity is good for our health, researchers were concerned that this percentage had declined over time. For this reason, they selected a random sample, without replacement of 1977 men in this age group and interviewed them. Out of this sample, 680 said that they were regularly active (Elwooxl et al. 2013).
QUESTION: Carry out a hypothesis test that will test whether the proportion of regularly active men in this age group has declined. Use a significance level of 5%.
On a questionnaire designed to measure empathy, the mean score for the general population is 30.6, random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard deviation of 6.6. What would the most..
What is the probability that the student answers at most nine questions correctly? Use combination and/or permutation formula: nCr/nPr.
74 cashews, and 45 pecans. At the 0.05 level of significance, conduct a nonparametric test that the machine is mixing nuts in the ratio 5:2:2:1.
Programmers have monthly incomes of less than $2,834, what is the value of the standard deviation of the monthly earnings of the computer programmers?
1.several years ago some colleagues and i did an experiment to see if avons skin-so-soft was as good as off in
Pick an integer from 0 through 10 inclusive, then three letters from the English alphabet. M is the event that the number chosen is even.
Use a standard normal distribution table to find a? z-score such that 10?% of the area under the standard normal curve is below that score.
This correlation was judged to be statistically significant. In your own words, what can you say about the nature of the relationship?
Compute the probability that the sample mean is: (Round your z values to 2 decimal places and final answers to 4 decimal places):
If one person is picked at random from all the people represented in the table, what is the probability of the following events?
Find the probability of the following event, expressing it as a fraction in lowest terms. She does not have all the red ones.
What score does an applicant need? Include a well-labeled Normal curve as part of your answer. See page 317 for guidance.
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