A population of score has μ  = 44. in this population, a score of X = 40 corresponds to z = -0.50. What is the population standard deviation?

00 HI T R of of 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 change if the patient is immediately told the truth about the injury. The EMT randomly selected 70 injured patients to immediately tell the truth about the injury and noticed that they averaged 13.4 minutes for their blood to begin clotting after their injury. Their standard deviation was 3.52 minutes. What can be concluded at the the a = 0.10 level of significance? %3D a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Select an answer O Select an answer C. The test statistic ? 0 is 0.475. Enter it here (please show your answer to 3 decimal places.) d. The p-value is 0.6360211626. Enter it here (Please show your answer to 4 decimal places.) e. The p-value is ? a f. Based on this, we should Select an answer the null hypothesis. g. Thus, the final conclusion is that O The data suggest the population mean…

On a recent quiz, the class mean was 71 with a standard deviation of 3.9. Calculate the z-score (to 4 decimal places) for a person who received score of 80. Z-Score: Is this unusual? Unusual Not Unusual

A distribution of values is normal with a mean of 202 and a standard deviation of 91.5.Find P75, which is the score separating the bottom 75% from the top 25%.P75 =