the text provided is already corrected and properly formatted 77493

Name: the text provided is already corrected and properly formatted 77493
Uploaded: 2023-10-08T06:14:37-08:00
Duration: 2 min 35 s
Channel: Adi S
Description: the text provided is already corrected and properly formatted 77493

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19. Suppose that Z ~ N(0,1). The value of Z0.25 - Z0.75 (75th percentile minus 25th percentile) is (A) 1.348979499 (B) -1.348979499 (C) -0.50 (D) 0.50. 20. The heights of women aged 20 to 29 are approximately Normal with mean = 64.3 inches and standard deviation = 2.7. The approximate standardized height of a woman whose height is 67 inches is (A) 1 (B) 2 (C) 3 (D) 4. 21. The heights of women aged 20 to 29 are approximately Normal with mean = 64.3 inches and standard deviation = 2.7. The approximate proportion of women whose heights are less than 57.55 is determined by (A) normalpdf(57.55, 64.3, 2.7) (B) normalcdf(-10^99, 57.55, 64.3, 2.7) (C) normalcdf(-10^99, -2.5, 0, 1) (D) both (B) and (C). 22. Scores of high school seniors on the SAT follow the Normal distribution with mean = 1026 and standard deviation = 209. The proportion of seniors who score more than 850 is determined by (A) normalcdf(850, 10^99, 1026, 209) (B) 0.800135536 (C) normalcdf((850 - 1026)/209, 10^99, 0, 1) (D) all of these.

Adi S.

1use-the-ti-84-calculator-to-find-the-z-score-for-which-the-area-to-its-left-is-078-round-the-answer-to-two-decimal-places-2use-the-ti-84-calculator-to-find-the-z-score-for-which-the-area-to-67909

Use the TI-84 calculator to find the z-score for which the area to its left is 0.78. Round the answer to two decimal places. Use the TI-84 calculator to find the z-score for which the area to its right is 0.06. Round the answer to two decimal places. A normal population has mean μ = 9 and standard deviation σ = 5. (a) What proportion of the population is less than 20? (b) What is the probability that a randomly chosen value will be greater than 6? Round the answers to four decimal places. Part 1 of 2 The proportion of the population less than 20 is . Part 2 of 2 The probability that a randomly chosen value will be greater than 6 is . A normal population has mean μ = 52 and standard deviation σ = 7. What is the 82nd percentile of the population? Use the TI-84 Plus calculator. Round the answer to at least one decimal place. The 82nd percentile of the population is . Baby weights: The weight of male babies less than 2 months old in the United States is normally distributed with mean 12.4 pounds and standard deviation 5.2 pounds. (a) Find the 80th percentile of the baby weights. (b) Find the 17th percentile of the baby weights. (c) Find the first quartile of the baby weights. Use the TI-84 Plus calculator and round the answers to at least two decimal places. Part 1 of 3 The 80th percentile of the baby weights is pounds. Part 2 of 3 The 17th percentile of the baby weights is pounds. Part 3 of 3 The first quartile of the baby weights is pounds. A normal population has mean μ = 39 and standard deviation σ = 10. (a) What proportion of the population is between 17 and 28? (b) What is the probability that a randomly chosen value will be between 35 and 45? Round the answers to at least four decimal places. Part 1 of 2 The proportion of the population between 17 and 28 is . Part 2 of 2 The probability that a randomly chosen value will be between 35 and 45 is .

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Solve the problem. Round results to the nearest hundredth. 3) The mean of a set of data is 273.02 and its standard deviation is 108.22. Find the z score for a value of 436.70. A) 1.66 B) 1.51 C) 1.81 D) 1.36 Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual. 4) A weight of 232 pounds among a population having a mean weight of 168 pounds and a standard deviation of 25.8 pounds. A) 2.5; unusual B) -2.5; not unusual C) 2.5; not unusual D) 64.5; unusual Determine which score corresponds to the higher relative position. 5) Which score has a higher relative position, a score of 257.4 on a test for which x̄ = 220 and s = 22, or a score of 89.6 on a test for which x̄ = 80 and s = 8? A) Both scores have the same relative position. B) A score of 257.4 C) A score of 89.6 Find the percentile for the data point. 6) Data set: 124 136 128 122 130 132 122 120 127 124 128 138 120 124 126 121; data point 130 A) 62 B) 70 C) 85 D) 75

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Transcript

00:01 In question number 19, we have to calculate the value of z of 0 decimal 25 minus z of 0 decimal 75.

00:12 Alright.

00:12 And in this case, the definition of z or z is defined as what z belongs to n of 0 1.

00:23 Alright.

00:24 Now, from the we write from the normal standard standard distribution, normal standard distribution table, we can easily find out the value of z.

00:47 Alright.

00:48 So, therefore, we are therefore, from the table, we get the value of z of 0 decimal 25 to be equals to what to be equals to minus 0 decimal 675.

01:06 Alright.

01:08 And similarly, we write similarly, again from the table, from the table, we get the value of z of 0 decimal 75.

01:24 And this is equals to what this is equals to positive or plus 0 decimal 675...

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