You measure 46 textbooks' weights, and find they have a mean weight of 34 ounces. Assume the population is normally distributed with a standard deviation of 14.3 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight.
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You measure 46 textbooks' weights, and find they have a
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- A particular fruit's weights are normally distributed, with a mean of 385 grams and a standard deviation of 17 grams.The heaviest 10% of fruits weigh more than how many grams?Give your answer to the nearest gram.It takes an average of 12.8 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will change if the patient is immediately told the truth about the injury. The EMT randomly selected 51 injured patients to immediately tell the truth about the injury and noticed that they averaged 14.1 minutes for their blood to begin clotting after their injury. Their standard deviation was 4.48 minutes. What can be concluded at the the a = 0.01 level significance? a. For this study, we should use [t-test for a population mean b. The null and alternative hypotheses would be: Но: 12.8 H1 : 12.8 c. The test statistic V =| 2.072 (please show your answer to 3 decimal places.) d. The p-value = | (Please show your answer to 4 decimal places.) e. The p-value is [? f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... a the null hypothesis. O The data suggest the populaton mean is significantly different from 12.8 at a = 0.01, so there is…It takes an average of 9.9 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will change if the patient is immediately told the truth about the injury. The EMT randomly selected 55 injured patients to immediately tell the truth about the injury and noticed that they averaged 9.7 minutes for their blood to begin clotting after their injury. Their standard deviation was 1.29 minutes. What can be concluded at the the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: Select an answer H1: Select an answer v c. The test statistic ? = (please show your answer to 3 decimal places.) d. The p-value - (Please show your answer to 4 decimal places.) e. The p-value is ?a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... е. the null hypothesis. O The data suggest the populaton mean is significantly different from 9.9 at a = 0.01, so there is…
- It takes an average of 11.6 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will change if the patient is immediately told the truth about the injury. The EMT randomly selected 40 injured patients to immediately tell the truth about the injury and noticed that they averaged 12.1 minutes for their blood to begin clotting after their injury. Their standard deviation was 1.76 minutes. What can be concluded at the the a = 0.05 level of significance? For this study, we should use Select an answer The null and alternative hypotheses would be: Ho: ? Select an answer H₁: ? Select an answer The test statistic ? ✓ = The p-value = The p-value is ? ✓ a Based on this, we should [Select an answer the null hypothesis. Thus, the final conclusion is that ... (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) O The data suggest the population mean is significantly different from 11.6 at a = 0.05, so there is statistically…The weights of the native North American Blue Jay have a mean of 18.4 ounces with a standard deviation of 3.6 ounces. The distribution can be considered normal. What is the 2.5th percentile of all weights? B D 12.478 14.800 13.792 11.344Americans (on average) individually eat 16 pounds of seafood each year with a standard deviation of 7 pounds. James samples 40 Americans and finds and average of 14 pounds. How likely is it to get an average of 14 pounds if he had a representative sample?
- It takes an average of 12.7 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will increase if the patient is immediately told the truth about the injury. The EMT randomly selected 46 injured patients to immediately tell the truth about the injury and noticed that they averaged 13.5 minutes for their blood to begin clotting after their injury. Their standard deviation was 1.77 minutes. What can be concluded at the the a = 0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: ? v Select an answer v H1: ? v Select an answer v c. The test statistic ? v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? v a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... the null hypothesis. O The data suggest that the population mean is not significantly greater than 12.7…It takes an average of 14.6 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will increase if the patient is immediately told the truth about the injury. The EMT randomly selected 60 injured patients to immediately tell the truth about the injury and noticed that they averaged 15.4 minutes for their blood to begin clotting after their injury. Their standard deviation was 2.66 minutes. What can be concluded at the the a = 0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: ? Select an answer ♥ H: ? v| Select an answer v c. The test statistic (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer | the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest that the population mean is not significantly greater than 14.6 at a =…A particular fruit's weights are normally distributed, with a mean of 427 grams and a standard deviation of 9 grams.The heaviest 20% of fruits weigh more than how many grams?Give your answer to the nearest gram.
- It takes an average of 13.2 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will decline if the patient is immediately told the truth about the injury. The EMT randomly selected 55 injured patients to immediately tell the truth about the injury and noticed that they averaged 13.1 minutes for their blood to begin clotting after their injury. Their standard deviation was 2.52 minutes. What can be concluded at the the a = 0.10 level of significance? a. For this study, we should use t-test for a population mean b. The null and alternative hypotheses would be: Но: v 13.2 %3D H1: H v > c. The test statistic t v (please show your answer to 3 decimal places.) = d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is s va f. Based on this, we should reject g. Thus, the final conclusion is that ... the null hypothesis. O The data suggest that the population mean is not significantly less than 13.2 at a = 0.10, so there is…It takes an average of 8.1 minutes for blood to begin clotting after an injury. An EMT wants to see if the average will decline if the patient is immediately told the truth about the injury. The EMT randomly selected 62 injured patients to immediately tell the truth about the injury and noticed that they averaged 7.8 minutes for their blood to begin clotting after their injury. Their standard deviation was 2.11 minutes. What can be concluded at the the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? V Select an answer Hj: ? VSelect an answer V c. The test statistic ? V = (please show your answer to 3 decimal places.) d. The p-value = e. The p-value is ? Va f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... (Please show your answer to 4 decimal places.) | the null hypothesis. O The data suggest the population mean is not significantly less than 8.1 at a = 0.05, so…A particular fruit's weights are normally distributed, with a mean of 747 grams and a standard deviation of 8 grams. The heaviest 13% of fruits weigh more than how many grams? Give your answer to the nearest gram.
