The systolic blood pressure (given in millimeters) of males has an approximately normal distribution with mean u = 135 and standard deviation o = 18. (a) Calculate the z-scores for the male systolic blood pressures 110 and 160 millimeters. (Round your answers to two decimal places.) 110 mm Z = 160 mm z = (b) If a male friend of yours said he thought his systolic blood pressure was 2.5 standard deviations below the mean, but that he believed his blood pressure was between 110 and 160 millimeters, what would you say to him? (Enter your numerical answer to the nearest whole number.) He is correct O because 2.5 standard deviations below the mean would give him a blood pressure reading of millimeters, which is below O the range of 110 to 160 millimeters.

Julie was assigned to take her statistics class with Professor Fisher, whose final scores follow a normal distribution with mean 75 (μ=75)(μ=75) and standard deviation of 6 (σ=6)(σ=6). Her score on the final was 84. What is Julie's z-score. Do not round.

Use the formula to find the standard error of the distribution of differences in sample means, I1 – X2. Samples of size 110 from Population 1 with mean 82 and standard deviation 14 and samples of size 80 from Population 2 with mean 76 and standard deviation 17 Round your answer for the standard error to two decimal places. standard error = i

Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 46 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.80 ml/kg for the distribution of blood plasma. (d) Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.90 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.) ________ male firefighters

For each problem, select the best response. (a) The scores of adults on an IQ test is approximately Normal with mean 100 and standard deviation 15. Corinne scores 118 on such test. Her z-score is about O A. 0.67 OB. 1.2 O C. 7.87 OD. 18 O E. None of the above. (b) A researcher wishes to determine whether the rate of water flow (in liters per second) over an experimental soil bed can be used to predict the amount of soil washed away (in kilograms). In this study, the explanatory variable is the O A. size of the soil bed. O B. rate of water flow. OC. amount of eroded soil. O D. depth of the soil bed. O E. None of the above. (c) Smokers don't live as long (on the average) as nonsmokers, and heavy smokers don't live as long as light smokers. You regress the age at death of a group of male smokers on the number of packs per day they smoked. The slope of your regression line A. will be greater than zero. OB. will be less than zero. OC. must be between 1 and 1. D. can't tell without seeing…

In a particular statistics exam, the 10th percentile of final exam score is 59, and the 90th percentile of final exam score is 93. A histogram of the scores approximately follows the normal curve. What is the approximate standard deviation of the final exam scores? Hints: What is the z value in the normal table that gives you closest to 80% of the area between -z and z? Now what does that tell you about the number of SDs in between 59 inches and 93 inches? You might find it helpful to draw a picture of the normal curve with original units and standard units. 13.1 26.2 17.2 6.5

Answer d, e, & f.

Solve this for me. Thank you.

Student Satisfaction sent from average to the 60th percentile (z score = .2533). Dr. Reed wants to know the projected impact on test scores.  All she knows is that Student Satisfaction and Student Test scores are correlated at .43 and the current average test score is 81% with a standard deviation of 5%.  Show your work

The systolic blood pressure (given in millimeters) of males has an approximately normal distribution with mean u = 125 and standard deviation o = 18. (a) Calculate the z-scores for the male systolic blood pressures 120 and 130 millimeters. (Round your answers to two decimal places.) 120 mm z = 130 mm Z = (b) If a male friend of yours said he thought his systolic blood pressure was 2.5 standard deviations below the mean, but that he believed his blood pressure was between 120 and 130 millimeters, what would you say to him? (Enter your numerical answer to the nearest whole number.) He is ---Select- v because 2.5 standard deviations below the mean would give him a blood pressure reading of ---Select--- v the range of 120 to 130 millimeters. millimeters, which is