Question

In: Statistics and Probability

a recent study focused on the activity of elderly persons. For the age group 60-64, 1052...

a recent study focused on the activity of elderly persons. For the age group 60-64, 1052 men and 1442 women were surveyed. Of these, 436 men and 719 some stated that they excursive zero times a week.

\a) is there evidence yo show a difference in the proportion of activity for the 60-64 age group by gender?

b) construct a 95% confidence interval for the difference in proportion of men and women that excursive at least once a week.

c) part a can be answered with either a confidence interval or a hypothesis test. discuss why. d) was practical significance, statistical significance or both observed? explain your answer.

Solutions

Expert Solution

a)

b)

c) yes both answers are same. because confidence interval contains also negative values. it means confidence interval supports alternative hypothesis.

d) both statically and practical significance.

please like ??

orchestra answered 1 year ago
Next > < Previous

Related Solutions

A recent study found that 70% of all people over 60 years of age wear glasses....
A recent study found that 70% of all people over 60 years of age wear glasses. If a random sample of 8 people over 60 years of age was selected, find these probabilities: a) Exactly 4 people will wear glasses. b) At most 2 people will wear glasses. c) At least 2 people will wear glasses. Show work and use binomial probability table.
A health study tracked a group of persons for five years. At the beginning of the...
A health study tracked a group of persons for five years. At the beginning of the study, 25% were classified as heavy smokers, 35% as light smokers, and 40% as nonsmokers. Results of the study showed that light smokers were twice as likely as nonsmokers to die during the five-year study, but only half as likely as heavy smokers. A randomly selected participant from the study died over the five-year period. Compute the probability that the participant was a nonsmoker.
A A recent study focused on the number of times men and women send a Twitter...
A A recent study focused on the number of times men and women send a Twitter message in a day. The information is summarized below. Sample Size Sample Mean Population Standard Deviation   Men 23          18          5                  Women 38          38          21                At the .01 significance level, is there a difference in the mean number of times men and women send a Twitter message in a day? What is the p-value for this hypothesis...
A recent study focused on the number of times men and women send a Twitter message...
A recent study focused on the number of times men and women send a Twitter message in a day. The information is summarized below. Sample Size Sample Mean Population Standard Deviation   Men 29          24          9                  Women 37          37          19                At the .01 significance level, is there a difference in the mean number of times men and women send a Twitter message in a day? What is the p-value for this hypothesis test?...
A recent study focused on the amount of money single men and women save monthly. The...
A recent study focused on the amount of money single men and women save monthly. The information is summarized here. Assume that the population standard deviations are equal. At the 0.01 significance level, what is the conclusion about the way women and men save?
Background: This activity is based on the results of a recent study on the safety of...
Background: This activity is based on the results of a recent study on the safety of airplane drinking water that was conducted by the U.S. Environmental Protection Agency (EPA). A study found that out of a random sample of 316 airplanes tested, 40 had coliform bacteria in the drinking water drawn from restrooms and kitchens. As a benchmark comparison, in 2003 the EPA found that about 3.5% of the U.S. population have coliform bacteria-infected drinking water. The question of interest...
A recent study focused on the number of times men and women who live alone buy...
A recent study focused on the number of times men and women who live alone buy take-out dinners in a month. The information is summarized below. Statistic Men Women Sample mean 25.0 21.2 Sample standard deviation 4.5 3.9 Sample size 110 110 At the .05 significance level, can we claim that men order take-out dinners more often than women?
A recent study focused on the number of times men and women who live alone buy...
A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. Assume that the distributions follow the normal probability distribution and the population standard deviations are equal. The information is summarized below. Statistic Men Women Sample mean 23.81 21.97 Sample standard deviation 5.67 4.61 Sample size 32 36 At the 0.01 significance level, is there a difference in the mean number of times men and women order take-out dinners in...
A recent study focused on the number of times men and women who live alone buy...
A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. Assume that the distributions follow the normal probability distribution and the population standard deviations are equal but unknown. The information is summarized below, Sample Mean Sample Standard Deviation Sample Size Men 25 6 20 Women 23 4 22 At the 0.05 significance level, is there a difference in the mean number of times men and women order take-out dinners...
A recent study focused on the number of times men and women who live alone buy...
A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. Assume that the distributions follow the normal probability distribution and the population standard deviations are equal. The information is summarized below. Statistic Men Women Sample mean 24.85 21.33 Sample standard deviation 5.54 4.93 Sample size 34 36 At the 0.01 significance level, is there a difference in the mean number of times men and women order take-out dinners in...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT