A random variable X following normal distribution with mean 21and standard deviation 7. Find p(x>23)? Round z score value to 2 decimals and final value to 4 decimals
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A random variable X following
Find p(x>23)?
Round z score value to 2 decimals and final value to 4 decimals
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- A random variable x following binomial distribution with p = 0.32 and n = 25. Find i) Mean and ii) standard deviationDon's z-score on a given measure is -2.5, where the population mean is 5 and the standard deviation is 1.5. What is Don's raw score? (Calculate X)Systolic blood pressure readings are normally distributed with a mean of 121 and standard deviation of 15. If a person from the population was selected at random, find the probability that their blood pressure is in the acceptable range (between 114 and 140) for an athletic activity. A. Label and shade the normal distribution curve to model this problem.
- A population of values has a normal distribution with �=17 and �=56.9. You intend to draw a random sample of size �=227.What is the mean of the distribution of sample means?��¯= What is the standard deviation of the distribution of sample means?��¯= Round to 4 decimal places.The shaded region under a Normal distribution with mean 0 and standard deviation 1 (Standard Normal distribution) is shown. Which of the following is the best choice that corresponds to the shaded region? Select one. mean Probability of z <+1.5 Probability of z-1.5 Probability of ze 1.5 Probability of z +1.5High density lipoprotein (HDL) in healthy males follows a normal distribution with a mean of 50 and a standard deviation of 8. What proportion of healthy males has HDL exceeding 60?
- approximate area under the normal distribution curve that falls within one standard deviation above and below the mean. Please give the shaded region.A distribution of values is normal with a mean of 173.5 and a standard deviation of 99.3.Find P3, which is the score separating the bottom 3% from the top 97%.P3 = Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.= Scores on a standardized exam are known to follow a normal distribution with standard deviation o 8.2. A researcher randomly selects 100 students and computes their average score. He reports that the mean score is 83, with a margin of error of 1.436. How confident are you that the mean score for all students taking the exam is in the interval (81.564, 84.436)?
- A population of values has a normal distribution with mean= 107.9 and sd= 99.9. You intend to draw a random sample of size n = 100. Find P11, Which is the mean separating the bottom 11% means from the top 89% means. P11 (for sample means) = Enter your answers as numbers accurate to 1 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.A random variable X is normally distributed with mean 32 and standard deviation 8.2 Find the z score for an individual score x = 23 Round to 2 decimalsAccording to the empirical rule for population data that form a normal distribution, 95% of the values are approximately within which range? A ±2 standard deviations from the mean ±1 standard deviation from the mean (c) +3 standard deviations f rom the mean 1 +- standard deviation from the mean 2
