Question

Earlier, we considered data from the GSS on numbers of close friends people reported having. The...

Earlier, we considered data from the GSS on numbers of close friends people reported having. The mean for this variable is 7.44, with a standard deviation of 10.98. Let's say that you decide to use the GSS data to test whether people who live in rural areas have a different mean number of friends than does the overall GSS sample. Again, treat the overall GSS sample as the entire population of interest. Let's say you select 40 people living in the rural areas and find that they have an average of 3.9 friends. A. what is the null hypothesis for this study? B. what is the research hypothesis for this study? C. would we compare sample data to a distribution of scores or to a distribution of means? Explain. D. Using symbolic notation and formulas, calculate the mean and standard error for the distribution of means. E. Using symbolic notation and the formula, calculate the z statistic for this sample. F. What is the approximate percentile for this sample? G. Let's say that the researchers concluded that people in rural areas have fewer friends than does the general population (thus rejecting the null hypothesis) If they are incorrect, have they made a Type I or Type II error? Explain.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
We are considering data from the GSS on numbers of close friends people reported having. The...
We are considering data from the GSS on numbers of close friends people reported having. The mean for this variable is 7.44, with a standard deviation of 10.98. Let's say that you decide to use the GSS data to test whether people who live in rural areas have a different mean number of friends than does the overall GSS sample. Again, treat the overall GSS sample as the entire population of interest. Let's say that you select 40 people living...
The General Social Survey (GSS) is a survey of approximately 2000 adults conducted each year since...
The General Social Survey (GSS) is a survey of approximately 2000 adults conducted each year since 1972, for a total of 38,000 participants. During several years of the GSS, participants were asked how many close friends they have. The mean for this variable is 7.44 friends, with a standard deviation of 10.98. The median is 5.00, and the mode is 4.00. 4. Now pretend you randomly selected a sample of 80 people from this population. Using symbolic notation, calculate the...
Close Friends: The 2004 General Social Survey (GSS) interviewed a random sample of adult Americans. For...
Close Friends: The 2004 General Social Survey (GSS) interviewed a random sample of adult Americans. For one question the interviewer asked: “From time to time, most people discuss important matters with other people. Looking back over the last six months – who are the people with whom you discussed matters important to you? Just tell me their first names or initials.” The interviewer then recorded how many names or initials the respondent mentioned. Results are tallied in the following table:...
A 2014 Pew study found that the average US Facebook user has 338 friends. The study...
A 2014 Pew study found that the average US Facebook user has 338 friends. The study also found that the median US Facebook user has 200 friends. What does this imply about the distribution of the variable "number of Facebook friends"? (You have two attempts for this problem, and five attempts each for the remaining problems) The distribution is normal The distribution is bimodal The distribution is approximately Q3 The distribution is left skewed The distribution is trending The distribution...
Suppose we have collected times, in minutes, that it takes volunteers to complete a set of...
Suppose we have collected times, in minutes, that it takes volunteers to complete a set of pencil and paper mazes. Volunteers are randomly assigned to one of two groups. Group 1 watch a 5 minute video explaining good strategies for completing the mazes. Group 2 watch a 5 minute video of other people successfully completing the mazes, but with no explanation given. Researchers are interested in testing against the null hypothesis that there is no difference in population mean times...
1. Insofar as we must generalize from a sample to a population, the observed difference between...
1. Insofar as we must generalize from a sample to a population, the observed difference between the sample mean and the hypothesized population mean a) can't be interpreted at face value. b) might be due to variability or chance. c) might be real. d) is described by all of the above 2. The advantage of a one-tailed test is that it increases the likelihood of detecting a a) false null hypothesis. b) false null hypothesis in the direction of concern....
Here's a question from when DM taught this course: We hypothesize that students at DM’s lab...
Here's a question from when DM taught this course: We hypothesize that students at DM’s lab have more psychotic episodes than the normal students at SFSU. A sample of 50 students from DM’s lab were randomly sampled and the mean number of psychotic episodes that they had per year was computed to be 27. Given the following information about the number of psychotic episodes per year that the general population at SFSU has, answer the following questions. µ = 25...
Four students reported their study time and test score from a statistics course and their data...
Four students reported their study time and test score from a statistics course and their data have been converted into Z scores in the table below. What is Pearson's correlation coefficient from this data set? Group of answer choices a.)-.50 b.)-.25 c.).75 d.)-1.00 In what situation would a researcher use a  t-test used instead of a Z-test? Group of answer choices a.)When there is only one sample. b.)When the population standard deviation is unknown. c.)When the sample size is smaller than...
-From a random sample of 52 people, the average of the results was 49.73 with a...
-From a random sample of 52 people, the average of the results was 49.73 with a standard deviation of 2.29. If we performed a hypothesis test for a population mean, then the degrees of freedom for this study is 51. -The shape of a population distribution is unknown. If we drew random samples of size 48 from the population, then it is safe to say that the sampling distribution of x̄ will be normally distributed. Decide wether the statements above...
We are interested in soda consumption among UW-Madison students. We have data from a sample of...
We are interested in soda consumption among UW-Madison students. We have data from a sample of 29 Soc 360 students. For these purposes we will consider our sample a SRS from the population of interest. Assume that 29 is a large enough n so that the sampling distribution will be Normal. Further suppose we know that the standard deviation of the number of bottles/cans of soda consumed in a day among UW-Madison students is 0.72. The mean number of bottle/cans...