You measure 25 textbooks' weights, and find they have a mean weight of 42 ounces. Assume the population standard deviation is 5 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight.
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- 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…Americans (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…
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- 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…For each case below, state what type of statistical test you would use to analyze each dataset. Explain your answer! Hemoglobin is a protein responsible for carrying oxygen throughout your blood stream. Blood hemoglobin levels in humans average at about 14.5g/dL. We are interested in whether a sample of 20 iron deficient individuals have lower blood hemoglobin levels compared to the general population. The average hemoglobin level for our sample is 10.9g/dL, with an estimated population standard deviation of 1.92g/dL. A researcher is looking at whether the time it takes for rats to relearn how to run a maze decreases after they’ve been exposed to the maze more than once. Using 15 rats, he measures how quickly they are able to successfully run a maze at two different times points: once when they are first exposed to the maze, and again after they’ve run the maze three times. A social psychologist is curious about whether social rejection increases aggression in narcissists. He…
- A doctor wants to estimate the mean trigliceride level of all 20-to 29-year-old females (in milligram per deciliter, mg/dL). How many subjects are needed to estimate the mean trigliceride level within 3 mg/dL with 95% confidence assuming s=17.1 mg/dL from an earlier study? 20- to 29-year-old females. The doctor needs to sample at least Question Help: Video Calculator Submit QuestionA 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.A particular fruit's weights are normally distributed, with a mean of 519 grams and a standard deviation of 10 grams.The heaviest 13% of fruits weigh more than how many grams?Give your answer to the nearest gram.