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.
1. Now pretend that you randomly selected a sample of 80 people from this population, and that it had a mean of 8.7. Would you compare this sample mean to a distribution of scores or to a distribution of means? Explain your answer.
2. What is the z statistic for this mean? Based on this z statistic, what is the approximate percentile for this sample?
3. Does it make sense to calculate a percentile for this sample? Explain your answer. (Hint: Consider the shape of the distribution.)
The General Social Survey (GSS) is a survey of approximately 2000 adults conducted each year since...
The General Social Survey (GSS) is a sociological survey used to collect data on demographic characteristics and attitudes of residents of the United States. In 2010, the survey collected responses from 1,154 US residents. The survey is conducted face-to-face with an in-person interview of a randomly selected sample of adults. One of the questions on the survey is “After an average workday, about how many hours do you have to relax or pursue activities that you enjoy?” A 95% confidence...
2. Proper ASW conducted a survey to learn about American adults attitudes toward money and happiness. Fifty-six percent of the respondents said that they balance their checkbook at least once a month. Suppose a sample of 400 American adults were taken. a. Describe the sampling distribution of the sample proportion. (3 pts) Shape: Mean: Standard deviation: b. What is the probability that the sample proportion of adults who balance their checkbook at least once a month will be greater than...
1. A survey was conducted with a random sample of 1000 adults. The participants were asked what their starting position was when they fell asleep at night. 41% said they start in the fetal position (on the side, curled up). a. Are the appropriate conditions met to create a confidence interval using the standard normal distribution? Explain. b. Compute a 99% confidence interval using the standard normal distribution. (Note that no software is needed, just a calculator): c. Interpret the...
Speeding and young drivers. Psychologists conducted a survey of 258 student drivers and their attitudes toward speeding and reported the results in the British Journal of Educational Psychology (Vol. 80, 2010). One of the vari- ables of interest was the response to the question, "Are you confident that you can resist your friends' persuasion to drive faster?" Each response was measured on a 7-point scale, from 1-"definitely no" to 7 "definitely yes." The data were collected 5 months after the...
MATH 2000 Homework 1 nSuppose that you randomly selected 50 students at GGC and collected data on the following five variables U: Number of courses the student is taking this V: The student's class X: The number of hours per week the student plans to study Y: The total cost of textbooks Z: Method of payment for textbook Questions: a) What is the population? b) Is the population finite or infinite? c) What is the sample? d) Classify the five...
Ideal Number of Frequency Children 27 521 263 67 10 This past year, an organizaton conducted a survey and asked, "What do you think is the ideal number of chidren for a family to have?" The results of the survey are shown in the table. Complete parts (a) through (e) l Click the ican to view the data table (a) Consruct a relative frequency histogram for the ideal number of chldren. Choose the correct graph below. O A O B...
dence to evidence This past year, an organization conducted a survey and asked, "What do you think is the ideal number of children for a family to have ?" The results of the survey are shown in the table. Complete parts (a) through (e). Click the icon to view the data table dence to co (a) Construct a relative frequency histogram for the ideal number of children. Choose the correct graph below. OC. OD ОА. Ов. ero @ 061 06...
1. In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. The bootstrap distribution (based on 5,000 samples) is provided. a). Would it be appropriate to use the normal distribution to construct the confidence interval in this situation? Explain briefly. b). The standard error from the bootstrap distribution is SE = 0.016. Use the normal distribution...
Answer in order please thank you.
Question1 A survey was conducted from a random sample of 8225 Americans, and one Selecd variable that was recorded for each participant was their answer to the question, "How old are you?" 1o points The mean of this data was found to be 42, while the median was 37. What does this tell you about the shape of this distribution? A. O It is symmetric. B. O It is skewed left. C. There is...
Statistics 200: Lab Activity for Section 3.3 Constructing Bootstrap Confidence Intervals - Learning objectives: • Describe how to select a bootstrap sample to compute a bootstrap statistic • Recognize that a bootstrap distribution tends to be centered at the value of the original statistic • Use technology to create a bootstrap distribution • Estimate the standard error of a statistic from a bootstrap distribution • Construct a 95% confidence interval for a parameter based on a sample statistic and the...