Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A computer dating service typically asks for various pieces of information such as height, weight, and income. One such service requested the length of index fingers. The only plausible reason for this request is to act as a proxy on height. Women have often complained that men lie about their heights. If there is a strong relationship between heights and index fingers, the information can be used to "correct" false claims about heights. To test the relationship between the two variables, researchers gathered the heights and lengths of index fingers (in centimeters) of 121 students.
a. Graph the relationship between the two variables.
b. Is there sufficient evidence to infer that height and length of index fingers are linearly related?
c. Predict with 95% confidence that height of someone whose index finger is 6.5 cm long. Is this prediction likely to be useful? Explain
Height (cm)
Index finger length (cm)
Gender
154.9
5.8
0
6.1
6.8
6.9
7.2
155.0
6.3
6.6
7.3
156.2
6.0
157.5
4.8
6.7
160.0
6.4
6.5
161.3
7.1
162.6
7.0
7.4
7.5
163.0
163.5
163.8
165.0
165.1
5.0
8.0
1
8.3
166.0
166.4
167.6
7.6
8.5
168.4
168.9
170.0
7.9
170.2
170.3
7.8
171.5
172.1
172.7
8.2
9.0
173.0
174.5
7.7
174.6
175.3
8.1
176.4
176.5
177.8
178.2
179.1
180.0
180.1
180.3
5.7
180.4
8.4
181.7
181.8
181.9
182.9
185.0
185.4
186.7
187.5
188.0
188.3
190.5
191.0
191.4
These 64 students will spend a combined total of more tahn $715.21? What is the probability that these 64 students will spend a combined total between $703.59 and $728.45?
use two sums from part A and the computational formal to compute sum of square (SS)for the scores.
A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years.
What do we use the F Distribution to test? Provide an example from your place of employment or circle of influence of an instance when you could use the F Distribution.
A random sample of 85 group leaders and supervisors revealed that they worked an average of 6.5 years before being promoted. The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for ..
Test the significant difference between Chi-square for attributes
A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought in to the time repairs are completed. A random sample of 12 repair records showed the following repair (in days)
Report the test statistic and p-value. What is your decision and conclusion? State any assumptions you have made. Are these assumptions satisfied with these data?
Suppose we want to test the hypothesis. State hypothesis Ho and the alternative hypothesis H1 that we would use for this test.
20 are selected without replacement for functional testing. If 20 cards are defective, what is the probability that at least 1 defective card is in the sample?
Find out correlation coefficient r, If student take 35 minutes to complete exam, what is his predicted score.
The National Center for Education Statistics reported that 47% of college students work to pay for tuition and living expenses. Assume that a sample of 450 college students was used in the study.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd