Using the Table of Standard Normal distribution to determine the corresponding probabilities of the following: (? < −1.45) (0.5 < ? < 2.33) (? > 1.78)
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Q: Use the normal distribution of SAT critical reading scores for which the mean is 504 and the…
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Q: Use the normal distribution of SAT critical reading scores for which the mean is 503 and the…
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- Using the Table of Standard
Normal distribution to determine the corresponding probabilities of the following:
- (? < −1.45)
- (0.5 < ? < 2.33)
- (? > 1.78)
Step by step
Solved in 4 steps
- Find the probability of the following using the standard normal-distribution a) P( -2.36 < z< -1.36) b) P(z < 1.36) Click this link for Normal table: https://drive.google.com/drive/folders/10Vh9 usp=sharing a) P( -2.36 < z < -1.36) = b) P(z < 1.36) =Suppose Z follows the standard normal distribution. calculator. Round your responses to at least three d (a) P(Z ≤ -1.80) = ☐ (b) P(Z > 1.41) = 0 (c) P(-0.63Suppose the random variable Z follows a standard normal distribution (the tabled curve). Find the chance Z is greater than 1.26. P(Z > 1.26) = Use 4 decimal places.Use the Central Limit Theorem to find the probability of the indicated event, assuming that the distribution of the population data is unknown. The amount of time students spend checking their phones during a lecture period has a mean of 9 minutes and standard deviation of 2 minutes. What is the probability that a sample of 30 students will spend an average of at most 9.7 minutes checking their phones during a lecture period? Standard Normal Distribution Table P( X̄ < 9.7)=__Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) ? = 8; ? = 2 P(7 ≤ x ≤ 11) = ? = 40; ? = 16 P(50 ≤ x ≤ 70) = ? = 13.6; ? = 3.1 P(8 ≤ x ≤ 12) = ? = 26; ? = 3.4 P(x ≥ 30) = ? = 104; ? = 15 P(x ≥ 90) =Use the normal distribution of SAT critical reading scores for which the mean is 503 and the standard deviation is 113. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 650? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 575? (a) Approximately (Round to two decimal places as needed.) % of the SAT verbal scores are less than 650.Evaluate the following probabilities based on the standard normal distribution: Round all answers to at least 3 decimal places. a. P(z 1.2) = c. P(-0.04 1.07) =Use the normal distribution of SAT critical reading scores for which the mean is 503 and the standard deviation is 110. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 675? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 550? (a) Approximately ____% of the SAT verbal scores are less than 675. (Round to two decimal places as needed.) (b) You would expect that approximately _____ SAT verbal scores would be greater than 550. (Round to the nearest whole number as needed.)Q3 i) The average number of acres of land cultivated with food grains is normally distributed with mean 4,300 acres per year, and standard deviation of 750 acres. What is the probability that between 2,500 and 4,200 acres will be cultivated in any given year? What number of cultivated acres corresponds to the 38th percentile?Use the normal distribution of SAT critical reading scores for which the mean is 508 and the standard deviation is 109. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 675? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 575?A sample of size 14 will be drawn from a population with mean 100 and standard deviation 40. Is it appropriate to use the normal distribution to find probabilities for x? Yes O No XViko