Question
In: Statistics and Probability
Two proposed computer mouse designs were compared by recording wrist extension in degrees for 24 people...
Two proposed computer mouse designs were compared by recording wrist extension in degrees for 24 people who each used both mouse designs.† The difference in wrist extension was calculated by subtracting extension for mouse type B from the wrist extension for mouse type A for each person. The mean difference was reported to be 8.82 degrees. Assume that this sample of 24 people is representative of the population of computer users.
(a)
Suppose that the standard deviation of the differences was 13 degrees. Is there convincing evidence that the mean wrist extension for mouse type A is greater than for mouse type B? Test the relevant hypotheses using a 0.05 significance level. (Use
μd = μA − μB.)
State the appropriate null and alternative hypotheses.
Find the test statistic and P-value. (Use a table or technology. Round your test statistic to one decimal place and your P-value to three decimal places.)
State the conclusion in the problem context.
b.
Suppose that the standard deviation of the differences was 33 degrees. Is there convincing evidence that the mean wrist extension for mouse type A is greater than for mouse type B? Test the relevant hypotheses using a 0.05 significance level. (Use
μd = μA − μB.)
State the appropriate null and alternative hypotheses.
Find the test statistic and P-value. (Use a table or technology. Round your test statistic to one decimal place and your P-value to three decimal places.)
State the conclusion in the problem context.
Solutions
orchestra answered 1 year agoRelated Solutions
Medical research has shown that repeated wrist extension beyond 20 degrees increases the risk of wrist...
Medical research has shown that repeated wrist extension beyond
20 degrees increases the risk of wrist and hand injuries. Each of
24 students at a university used a proposed new computer mouse
design. While using the mouse, each student's wrist extension was
recorded. Data consistent with summary values given in a paper are
given. Use these data to test the hypothesis that the mean wrist
extension for people using this new mouse design is greater than 20
degrees. (Use α...
Medical research has shown that repeated wrist extension beyond 20 degrees increases the risk of wrist...
Medical research has shown that repeated wrist extension beyond
20 degrees increases the risk of wrist and hand injuries. Each of
24 students at a university used a proposed new computer mouse
design. While using the mouse, each student's wrist extension was
recorded. Data consistent with summary values given in a paper are
given. Use these data to test the hypothesis that the mean wrist
extension for people using this new mouse design is greater than 20
degrees. (Use
α...
section 10.4 Medical research has shown that repeated wrist extension beyond 20 degrees increases the risk...
section 10.4
Medical research has shown that repeated wrist extension beyond
20 degrees increases the risk of wrist and hand injuries. Each of
24 students at a university used a proposed new computer mouse
design. While using the mouse, each student's wrist extension was
recorded. Data consistent with summary values given in a paper are
given. Use these data to test the hypothesis that the mean wrist
extension for people using this new mouse design is greater than 20
degrees....
5. Two brands of coffee were compared. Two independent random samples of 50 people each were...
5. Two brands of coffee were compared. Two independent random
samples of 50 people each were asked to taste either Brand A or
Brand B coffee, and indicate whether they liked it or not. Eighty
four percent of the people who tasted Brand A liked it; the
analogous sample proportion for Brand B was ninety percent.
(A) [8] At α = 0.01, is there a significant difference in the
proportions of individuals who like the two coffees? Use the
p-value...
(a) Two website designs are being compared. 54 students have agreed to be subjects for the...
(a) Two website designs are being compared. 54 students have
agreed to be subjects for the study, and they are randomly assigned
to visit one or the other of the websites for as long as they like
(i.e., half of this number are assigned to visit each of the
websites) . For each student the study directors record whether or
not the visit lasts for more than a minute. For the first design,
13 students visited for more than a...
Two computer users were discussing tablet computers. A higher proportion of people ages 16 to 29...
Two computer users were discussing tablet computers. A higher
proportion of people ages 16 to 29 use tablets than the proportion
of people age 30 and older. The table below details the number of
tablet owners for each age group. Test at the 1% level of
significance. (For subscripts let 1 = 16-29 year old users, and 2 =
30 years old and older users.)
16–29 year
olds
30 years old and
older
Own a Tablet
69
231
Sample Size...
16) Two computer users were discussing tablet computers. A higher proportion of people ages 16 to...
16) Two computer users were discussing tablet computers.
A higher proportion of people ages 16 to 29 use tablets than the
proportion of people age 30 and older. The table below details the
number of tablet owners for each age group. Test at the 1% level of
significance. (For subscripts let 1 = 16-29 year old users, and 2 =
30 years old and older users.)
16–29 year olds
30 years old and older
Own a Tablet
69
231
Sample...
Two computer users were discussing tablet computers. A higher proportion of people ages 16 to 29...
Two computer users were discussing tablet computers. A higher
proportion of people ages 16 to 29 use tablets than the proportion
of people age 30 and older. The table below details the number of
tablet owners for each age group. Test at the 1% level of
significance. (For subscripts let 1 = 16-29 year old users, and 2 =
30 years old and older users.)
16–29 year
olds
30 years old and
older
Own a
Tablet
69
231
Sample
Size...
Two computer users were discussing tablet computers. A higher proportion of people ages 16 to 29...
Two computer users were discussing tablet computers. A higher
proportion of people ages 16 to 29 use tablets than the proportion
of people age 30 and older. The table below details the number of
tablet owners for each age group. Test at the 1% level of
significance. (For subscripts let 1 = 16-29 year old users, and 2 =
30 years old and older users.)
16–29 year
olds
30 years old and
older
Own a
Tablet
69
231
Sample
Size...
Researchers compared the reaction times in people who were sleep deprived versus people who had gotten...
Researchers compared the reaction times in people who were
sleep deprived versus people who had gotten a full night's rest.
The following are typical data showing the reaction time scores (in
seconds) for two groups (samples) of participants.
______________________________
Sleep
deprived
Well Rested
3 5 2 3
7
3 1 2 2 1
6 1 9 2
11
1 2 3 3 5
10 3 3 5
4
2 3 1 3 2
Compute the mean, the range, the variance,...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Explain the capabilities of the Ollgdbg and its interfaces. What is rebasing?
- Woodbridge Manufacturing case in Appendix E, and use the three primary project evaluation methods (NPV, IRR...
- I need some good/new/not common research topics for my proposal assignment (Don't Need Political Topics, Technology...
- Write a C++ program that reads integers from standard input until end of file. Print out...
- Woo Audio is a small company in New York that makes high-quality headphone amplifiers. The company...
- How are users categorized? In Linux, which user has all the privileges? Why do we need...
- Force Table: If the center ring were to have considerable mass, what effect would it have...
ADVERTISEMENT