Homework Answers
We have given,
Null hypothesis
Alternative hypothesis
Z critical value =1.9600...................by using Z table or Excel =NORMSINV(1-(0.05/2))
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DI Question 32 3 pts ifference of two proportions. A study was done to determine computer...
Question 33 3 pts Difference of two proportions. A study was done to determine computer usage...
Question 33 3 pts Difference of two proportions. A study was done to determine computer usage of workers by age using data from the General Social Survey. The survey asked respondents if they used a computer at work. The researchers did not have a strong prior belief that one group would be higher than another. On the one hand, older workers potentially had more experience and their use might be higher. On the other, it might be reasonable to say...
A study was done to determine whether the proportion of younger adults who subscribe to a traditional TV service (Comcas...
A study was done to determine whether the proportion of younger adults who subscribe to a traditional TV service (Comcast, DirecTV, Dish, etc.) differs according to age. The results are summarized in the following table: Age Traditional TV? >= 20 and < 30 >= 30 and < 40 Total Yes 257 276 533 No 743 615 1358 Total 1000 891 1891 (a) At the .05 level of significance, use a 2-test to see if the sample data provides evidence that...
Question 41 2 pts A software company is developing a new computer game. The manager wants...
Question 41 2 pts A software company is developing a new computer game. The manager wants to know what effect the frequency at which opponents are released by the computer has on the length of time players survive in the game. A large group of playtesters is available, most of whom already have some experience playing the new game, and each is randomly allocated to play the game with a different opponent release frequency Data was collected for the variables...
please only answer question 4, also show work (9 points) A 20-minute consumer survey mailed to...
please only answer question 4, also show work
(9 points) A 20-minute consumer survey mailed to 300 adults aged 25-34 included a $5 Starbucks gift certificate. The same survey was mailed to 300 adults aged 25-34 without the gift certificate. There were 46 responses from the first group and 20 from the second group Use the table below to summarize this information. Round all answers to four decimal places Responded Did not respond Group Gift Card 46 No Gift Card...
In recent years more people have been working past the age of 65. In 2005, 27%...
In recent years more people have been working past the age of 65. In 2005, 27% of people aged 65–69 worked. A recent report from the Organization for Economic Co-operation and Development (OECD) claimed that the percentage working had increased (USA Today, November 16, 2012). The findings reported by the OECD were consistent with taking a sample of 600 people aged 65-69 and finding that 180 of them were working. a. Develop a point estimate of the proportion of people...
25.35 Comparing two proportions and the chi-square test. The popularity of computer, video, online, and virtual...
25.35 Comparing two proportions and the chi-square test. The popularity of computer, video, online, and virtual reality games has raised concerns about their ability to negatively affect youth, although the existing literature has been inconsistent. A recent survey of 14- to 18-year-olds in Connecticut high schools compared, among other things, aggressive behavior as evidenced by getting into serious fights for girls who have and have not played video games. When comparing two proportions such as these, the data can be...
A survey was conducted to determine whether hours of sleep per night are independent of age....
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. sample data follow. Age...
In a study of high-achieving high school graduates, the authors of a report surveyed 834 high...
In a study of high-achieving high school graduates, the authors of a report surveyed 834 high school graduates who were considered "academic superstars" and 434 graduates who were considered "solid performers." One question on the survey asked the distance from their home to the college they attended. Assuming it is reasonable to regard these two samples as random samples of academic superstars and solid performers nationwide, use the accompanying data to determine if it is reasonable to conclude that the...
A survey was conducted to determine whether hours of sleep per night are independent of age....
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Hours...
How are the last two calculated? &12.2.15-T Question Help A study reported that 48% of men...
How are the last two
calculated?
&12.2.15-T Question Help A study reported that 48% of men age 62 to 64 were still working, 34% of women age 62 to 64 were still working, 27% men age 65 to 69 were still working, and 23% of women age 65 to 69 were still working. Suppose that the study was based on a sample size of 100 in each group. Complete parts (a) through (c) a. Is there evidence of a significant...
Question 33 3 pts Difference of two proportions. A study was done to determine computer usage of workers by age using data from the General Social Survey. The survey asked respondents if they used a computer at work. The researchers did not have a strong prior belief that one group would be higher than another. On the one hand, older workers potentially had more experience and their use might be higher. On the other, it might be reasonable to say...
Question 41 2 pts A software company is developing a new computer game. The manager wants to know what effect the frequency at which opponents are released by the computer has on the length of time players survive in the game. A large group of playtesters is available, most of whom already have some experience playing the new game, and each is randomly allocated to play the game with a different opponent release frequency Data was collected for the variables...
please only answer question 4, also show work
(9 points) A 20-minute consumer survey mailed to 300 adults aged 25-34 included a $5 Starbucks gift certificate. The same survey was mailed to 300 adults aged 25-34 without the gift certificate. There were 46 responses from the first group and 20 from the second group Use the table below to summarize this information. Round all answers to four decimal places Responded Did not respond Group Gift Card 46 No Gift Card...
25.35 Comparing two proportions and the chi-square test. The popularity of computer, video, online, and virtual reality games has raised concerns about their ability to negatively affect youth, although the existing literature has been inconsistent. A recent survey of 14- to 18-year-olds in Connecticut high schools compared, among other things, aggressive behavior as evidenced by getting into serious fights for girls who have and have not played video games. When comparing two proportions such as these, the data can be...
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. sample data follow. Age...
How are the last two
calculated?
&12.2.15-T Question Help A study reported that 48% of men age 62 to 64 were still working, 34% of women age 62 to 64 were still working, 27% men age 65 to 69 were still working, and 23% of women age 65 to 69 were still working. Suppose that the study was based on a sample size of 100 in each group. Complete parts (a) through (c) a. Is there evidence of a significant...
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