Question 10
The General Social Survey recently asked 1972 adults how many years of education they had. Based on the results they calculated a 98% confidence interval for the mean years of education was 13.21 to 13.53.
The point estimate of the population mean years of education was BLANK-1 years.
Solution :
=
(Lower confidence interval + Upper confidence interval ) / 2
mean =
= (13.21+13.53) / 2=13.37
point estimate=13.37
Question 10 The General Social Survey recently asked 1972 adults how many years of education they...
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...
The 2010 General Social Survey asked the question: "After an average work day, about how many hours do you have to relax or pursue activities that you enjoy?" to a random sample of 1155 Americans. A 90% confidence interval for the mean number of hours spent relaxing or pursuing activities they enjoy was [1.17, 1.83]. (a) Interpret this interval in context of the data: "There is a 90% chance that the average number of hours spent by Americans relaxing after...
Required information The General Social Survey asked a sample of adults how many siblings (brothers and sisters) they had () and also how many children they had (Y). We show results for those who had no more than 4 children and no more than 4 siblings. Assume that the joint probability mass function is given in the following contingency table: 0.03 0.09 0.07 0.06 0.04 0.01 0.05 0.05 0.04 0.03 2 0.02 0.08 0.07 0.09 0.04 0.01 0.03 0.04 0.04...
In a survey, 500 adults in a certain country were asked how many hours they worked in the previous week. Based on the results, a 95% confidence interval for mean number of hours worked was lower bound: 37.1 and upper bound: 38.9. Which of the following represents a reasonable interpretation of the result? For those that are not reasonable, explain the flaw. Complete parts (a) through (d) below. (a) There is a 95% chance the mean number of hours worked...
TY in advance.
A survey was conducted that asked 1033 people how many books they had read in the past year. Results indicated that number of books people read. Interpret the interval. 13.1 books and s 18.4 books. construct a 98% confidence interval for the mean Construct a 98% confidence interval for the mean number of books people read and interpret the resuit. Select the correct choice below and fill in the answer boxes to complete your choice (Use ascending...
The General Social Survey collects data on demographics, education, and work, among many other characteristics of US residents. The histograms below display the distributions of hours worked per week for two education groups: those with and without a college degree. Suppose we want to estimate the difference between the average number of hours worked per week by all Americans with a college degree and those without a college degree. Summary information for each group is shown in the tables. Statistic...
A polling center conducted a survey that asked 1016 adults how many books they'd read in the last year. Results indicated that x baroverx=12.1 books and standard deviation, s, =16.6 books. Construct a 90% confidence interval for the mean number of books people read.
A survey of 675 randomly sampled adults asked how many hours per week each respondent spent watching television. The margin of error was 3 hours per week. The confidence interval was taken at the 95% level. This means that, if the same survey question was repeated in 100 random samples of 675 adults, the results of about 95 of those surveys would be within 3 hours of the results of this survey.
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" We're interested in examining whether or not there are differences in the typical work week length based on the level of education of the worker....
Chapter 9 A survey was conducted that asked 1017 people how many books they had read in the past years. Results indicated that x bar =10.8 books and s = 16.6 books. Construct a 90% confidence interval for the mean number of books people read. Construct a 90% confidence interval for the mean number of books people read and interpret the results. (Use ascending order. Round to two decimal places as needed.) 1.) If repeated samples are taken,90% of them...