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31. (4 points (bonus)) Use the following information to answer the question. A research company developed...
-6 points You may need to use the appropriate appendix table or technology to answer this...
-6 points You may need to use the appropriate appendix table or technology to answer this question. Consider the following hypothesis test. ASWSBE 139E.011. 3. + Ho' μ-15 Ha: μ * 15 A sample of 50 provided a sample mean of 14.09. The population standard deviation is 3 (a) Find the value of the test statistic. (Round your answer to two decimal places.) (b) Find the p-value. (Round your answer to four decimal places.) p-value (c) At α-0.05, state your...
Please use this information to answer the next questions An investigation was launched to address the...
Please use this information to answer the next questions An investigation was launched to address the effectiveness of an antibacterial soup in reducing operating room contamination. The new soup was fosted in a sample of eight operating rooms in the greater Seattle res Data was collected on the level of operating room contamination her values indicate greater contaminar on in these light operating rooms before the new soap was used and after the new soap was used Output are based...
QUESTION 6 20 points Save Answer A drug company is considering marketing a new local anesthetic....
QUESTION 6 20 points Save Answer A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is currently producing has a normal distribution with an mean of 7.4 minutes with a standard deviation of 1.2 minutes. The chemistry of the new anesthetic is such that the effective time should be normally distributed with the same standard deviation, but the mean effective time may be lower. If it is lower, the drug...
You may need to use the appropriate appendix table or technology to answer this question Consider the following hypothesis test H0: p = 0.20 Ha: p # 0.20 A sample of 400 provided a sample proportion...
You may need to use the appropriate appendix table or technology to answer this question Consider the following hypothesis test H0: p = 0.20 Ha: p # 0.20 A sample of 400 provided a sample proportion p = 0.185 (a) Compute the value of the test statistic. (Round your answer to two decimal places.) (b) What is the p-value? (Round your answer to four decimal places.) p-value- (C) 0.05, what is your conclusion? 0 Reject H0. There is insufficient evidence...
You may need to use the appropriate technology to answer this question. Consider the following hypothesis...
You may need to use the appropriate technology to answer this question. Consider the following hypothesis test. The following results are from independent samples taken from two populations assuming the variances are unequal Sample 1 Sample 2 n1-352 x1-13.6x2-10.1 s, 5.5 s = 8.1 n2-40 (a) What is the value of the test statistic? (Use X1-x2. Round your answer to three decimal places.) (b) What is the degrees of freedom for the t distribution? (Round your answer down to the...
QUESTION 8 [NOTE: The next 8 questions are all different parts of this question]. Before they...
QUESTION 8 [NOTE: The next 8 questions are all different parts of this question]. Before they can be marketed, all new medical devices must be approved by the Food and Drug Administration (FDA). A new device has a protective cover which needs to be removed easily. A similar device, already on the market, has a cover that requires an average force of 8 pounds to remove. The laboratory test data on a random sample of 9 of the new device...
11.12/16.66 points You may need to use the appropriate technology to answer this question Use α0.01...
11.12/16.66 points You may need to use the appropriate technology to answer this question Use α0.01 and conduct a goodness of fit test using 5 classes to see whether the following sample appears to have been selected from a normal probability distribution. Previous Answers ASWSBE13 12 E.025. My Notes + - Note: x-69.2 and s-18.) 54 | 85 | 93 57 54 94 | 54 | 51 | 68 | 94 | 89 | 64 | 86 | 49 55...
Answer the following questions (1/2 point each, 4 points total): a. When should we use a...
Answer the following questions (1/2 point each, 4 points total): a. When should we use a t-test? b. When should we use a single-sample t-test? c. Why do we calculate standard deviation using N-1 rather than N like we used to? d. What is the standard error of the mean? e. Does it get larger or smaller as our sample size increases? Why? f. Does the critical value of t (i.e, the score you need for your results to be...
Bonus (5 points) Suppose that you are testing the following hypotheses: Ho: 4 = 10 and...
Bonus (5 points) Suppose that you are testing the following hypotheses: Ho: 4 = 10 and H :> 10. If the null hypothesis is rejected at the 1% level of significance, what statement can you make about the confidence interval on the mean? a) The lower bound of a 95% one-sided confidence interval on the mean exceeds 10. b) 9 <u< 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the...
Q2) Paired-Samples t Test (14 points) A research project has been tracking the health and cognitive...
Q2) Paired-Samples t Test (14 points) A research project has been tracking the health and cognitive functions of the elderly population in Arizona. The table below shows the memory test scores from 10 elderly residents, tested first when they were 65 years old and again when they were 75 years old. The researcher wants to know if there is a significant decline in memory functions from age 65 to age 75 based on this sample. In other words, it is...
-6 points You may need to use the appropriate appendix table or technology to answer this question. Consider the following hypothesis test. ASWSBE 139E.011. 3. + Ho' μ-15 Ha: μ * 15 A sample of 50 provided a sample mean of 14.09. The population standard deviation is 3 (a) Find the value of the test statistic. (Round your answer to two decimal places.) (b) Find the p-value. (Round your answer to four decimal places.) p-value (c) At α-0.05, state your...
Please use this information to answer the next questions An investigation was launched to address the effectiveness of an antibacterial soup in reducing operating room contamination. The new soup was fosted in a sample of eight operating rooms in the greater Seattle res Data was collected on the level of operating room contamination her values indicate greater contaminar on in these light operating rooms before the new soap was used and after the new soap was used Output are based...
QUESTION 6 20 points Save Answer A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is currently producing has a normal distribution with an mean of 7.4 minutes with a standard deviation of 1.2 minutes. The chemistry of the new anesthetic is such that the effective time should be normally distributed with the same standard deviation, but the mean effective time may be lower. If it is lower, the drug...
You may need to use the appropriate appendix table or technology to answer this question Consider the following hypothesis test H0: p = 0.20 Ha: p # 0.20 A sample of 400 provided a sample proportion p = 0.185 (a) Compute the value of the test statistic. (Round your answer to two decimal places.) (b) What is the p-value? (Round your answer to four decimal places.) p-value- (C) 0.05, what is your conclusion? 0 Reject H0. There is insufficient evidence...
You may need to use the appropriate technology to answer this question. Consider the following hypothesis test. The following results are from independent samples taken from two populations assuming the variances are unequal Sample 1 Sample 2 n1-352 x1-13.6x2-10.1 s, 5.5 s = 8.1 n2-40 (a) What is the value of the test statistic? (Use X1-x2. Round your answer to three decimal places.) (b) What is the degrees of freedom for the t distribution? (Round your answer down to the...
11.12/16.66 points You may need to use the appropriate technology to answer this question Use α0.01 and conduct a goodness of fit test using 5 classes to see whether the following sample appears to have been selected from a normal probability distribution. Previous Answers ASWSBE13 12 E.025. My Notes + - Note: x-69.2 and s-18.) 54 | 85 | 93 57 54 94 | 54 | 51 | 68 | 94 | 89 | 64 | 86 | 49 55...
Answer the following questions (1/2 point each, 4 points total): a. When should we use a t-test? b. When should we use a single-sample t-test? c. Why do we calculate standard deviation using N-1 rather than N like we used to? d. What is the standard error of the mean? e. Does it get larger or smaller as our sample size increases? Why? f. Does the critical value of t (i.e, the score you need for your results to be...
Bonus (5 points) Suppose that you are testing the following hypotheses: Ho: 4 = 10 and H :> 10. If the null hypothesis is rejected at the 1% level of significance, what statement can you make about the confidence interval on the mean? a) The lower bound of a 95% one-sided confidence interval on the mean exceeds 10. b) 9 <u< 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the...
Q2) Paired-Samples t Test (14 points) A research project has been tracking the health and cognitive functions of the elderly population in Arizona. The table below shows the memory test scores from 10 elderly residents, tested first when they were 65 years old and again when they were 75 years old. The researcher wants to know if there is a significant decline in memory functions from age 65 to age 75 based on this sample. In other words, it is...
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