1) The p value we’ve used in PSYC 510 and 515 was set at .05, but...
1) The p value we’ve used in PSYC 510 and 515 was set at .05, but others in our field at times use .01. If researchers used the same assessments and sample sizes, lowering the alpha would affect what?
Homework Answers
The smaller the p value is , the lower the chances one has of rejecting the null hypothesis even when it is false. Using a lower p value would lead to a increase in the probability of a Type II error occuring. A type II error occurs when we accpet the null hypothesis when infact it is false.
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1) The p value we’ve used in PSYC 510 and 515 was set at .05,
but...
Question 9 If the nominal alpha is set to .05, what p value would be considered...
Question 9 If the nominal alpha is set to .05, what p value would be considered statistically significant? O 22 O 2.2 O 022 O .22
(PLEASE PUT HO,HA, RIGHT/LEFT TAIL, TWO TAILS,CRITICAL VALUE, ALPHA,TEST-STATISTIC,P-VALUE,DECISION AND CONCLUSION) 1. Does aspirin reduce heart...
(PLEASE PUT HO,HA, RIGHT/LEFT TAIL, TWO TAILS,CRITICAL VALUE, ALPHA,TEST-STATISTIC,P-VALUE,DECISION AND CONCLUSION) 1. Does aspirin reduce heart attacks? In a study 11037 males physicians were given aspirin daily and 139 experience a heart attack withing a 10 year period, while 11034 male physicians were given a placebo daily and 239 experienced a heart attack in the same 10 year period. Use a significance level of .05 to test the claim that daily use of aspirin reduces the proportion of those who...
1. 2. For this problem you will need a t-table. What is the t-value needed for the...
1.
2. For this problem you will need a t-table. What is
the t-value needed for the critical value for a one-tailed upper
hypothesis test with a sample size = 40 and alpha =.05?
3. Each year Delta Dental does a survey of parents concerning
the tradition of the Tooth Fairy. A random sample of
1,058 parents were asked about how much money they leave for a
tooth and questions concerning how their child responded to the
concept of the Tooth Fairy. In...
Name: Instructor Date: Section 6. The regression line equation for a set of data is given...
Name: Instructor Date: Section 6. The regression line equation for a set of data is given by y-23x+. -10. The value of for this same data set is 10.1. Use α .05 a. If the lincar correlation coefficient for this data is -521, what is the best y -value for x 57 b. If the linear correlation coefficient for this data is r 972, what is the best predicted y-value for x=5? size n 15 with a 01 7. What...
Probability of Correlation; This is the “p-test page 1, p-test page 2, and the P Value...
Probability of Correlation; This is the “p-test page 1, p-test page 2, and the P Value Correlation Guide” in the Supplemental Area. Example 10-1 in the book We have made a process improvement changing the average dry time from 121 minutes to 112 minutes. What is the Probability of Correlation or “Null Hypothesis of No Change”. Stated another way, what is the probability of they are from the same data set and there has been no change. Hence, proving the...
Probability of Correlation; This is the “p-test page 1, p-test page 2, and the P Value...
Probability of Correlation; This is the “p-test page 1, p-test page 2, and the P Value Correlation Guide” in the Supplemental Area. Example 10-1 in the book We have made a process improvement changing the average dry time from 121 minutes to 112 minutes. What is the Probability of Correlation or “Null Hypothesis of No Change”. Stated another way, what is the probability of they are from the same data set and there has been no change. Hence, proving the...
Question 8 3 pts The p-value for a Hypothesis Test of a mean or proportion O All the answers are correct Is based on th...
Question 8 3 pts The p-value for a Hypothesis Test of a mean or proportion O All the answers are correct Is based on the probability of the test statistic on out in the relevant tail(s) of the distribution Is twice as large if it is a two-tailed test O is compared with alpha to make a conclusion in a hypothesis test Question 11 3 pts For this problem it would be helpful to have a standard normal table. What...
Question 32 3 pts Proportion Problem. Each year Delta Dental does a survey of parents concerning...
Question 32 3 pts Proportion Problem. Each year Delta Dental does a survey of parents concerning the tradition of the Tooth Fairy. A random sample of 1,058 parents were asked about how much money they leave for a tooth and questions concerning how their child responded to the concept of the Tooth Fairy. In one question, 508 parents indicated that their child saved the money they got for their tooth. You are asked to Test to see if this proportion...
1) 2) The time delay is measured for a city street. Variability in this value is...
1)
2)
The time delay is measured for a city street. Variability in this value is estimated as = 0.3 (for time in minutes) by experience. Traffic signs and lights were recently altered to facilitate traffic and reduce delays. Delay times in minutes for a random car sample before and after the rearrangement are shown below. Before 7.5 7.0 7.1 7.3 7.7 7.0 6.8 6.6 7.0 7.3 7.5 7.2 After 6.5 6.6 5.3 6.4 7.0 5.7 6.0 5.9 5.8 6.1...
4 Hem' in th he n e yol more hard-wor (median) UCSD student?" You might wonder what percentage, p, of UCSD stud...
4 Hem' in th he n e yol more hard-wor (median) UCSD student?" You might wonder what percentage, p, of UCSD students would say "yes" to this (if you force a yes/no inary a. Set up hypotheses that make sense for this scenario. Use a two-sided alternative and give a reason why p might be larger than the value set in the null hypothesis, and a reason why p might be less b. You conduct a study and asksome random...
Question 9 If the nominal alpha is set to .05, what p value would be considered statistically significant? O 22 O 2.2 O 022 O .22
1.
2. For this problem you will need a t-table. What is
the t-value needed for the critical value for a one-tailed upper
hypothesis test with a sample size = 40 and alpha =.05?
3. Each year Delta Dental does a survey of parents concerning
the tradition of the Tooth Fairy. A random sample of
1,058 parents were asked about how much money they leave for a
tooth and questions concerning how their child responded to the
concept of the Tooth Fairy. In...
Name: Instructor Date: Section 6. The regression line equation for a set of data is given by y-23x+. -10. The value of for this same data set is 10.1. Use α .05 a. If the lincar correlation coefficient for this data is -521, what is the best y -value for x 57 b. If the linear correlation coefficient for this data is r 972, what is the best predicted y-value for x=5? size n 15 with a 01 7. What...
Question 8 3 pts The p-value for a Hypothesis Test of a mean or proportion O All the answers are correct Is based on the probability of the test statistic on out in the relevant tail(s) of the distribution Is twice as large if it is a two-tailed test O is compared with alpha to make a conclusion in a hypothesis test Question 11 3 pts For this problem it would be helpful to have a standard normal table. What...
Question 32 3 pts Proportion Problem. Each year Delta Dental does a survey of parents concerning the tradition of the Tooth Fairy. A random sample of 1,058 parents were asked about how much money they leave for a tooth and questions concerning how their child responded to the concept of the Tooth Fairy. In one question, 508 parents indicated that their child saved the money they got for their tooth. You are asked to Test to see if this proportion...
1)
2)
The time delay is measured for a city street. Variability in this value is estimated as = 0.3 (for time in minutes) by experience. Traffic signs and lights were recently altered to facilitate traffic and reduce delays. Delay times in minutes for a random car sample before and after the rearrangement are shown below. Before 7.5 7.0 7.1 7.3 7.7 7.0 6.8 6.6 7.0 7.3 7.5 7.2 After 6.5 6.6 5.3 6.4 7.0 5.7 6.0 5.9 5.8 6.1...
4 Hem' in th he n e yol more hard-wor (median) UCSD student?" You might wonder what percentage, p, of UCSD students would say "yes" to this (if you force a yes/no inary a. Set up hypotheses that make sense for this scenario. Use a two-sided alternative and give a reason why p might be larger than the value set in the null hypothesis, and a reason why p might be less b. You conduct a study and asksome random...
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