14:34. Suppose the waist measurements W of 800 girls are normally distributed with mean ems ana standard deviation 5 cms. Find the number N of girls with waists- (i) between 65 cms and 70 cms: (ii) greater than or equal to 72 cms.
Q: For a normally distributed population with a mean of 40 and a standard deviation of 5 find P(38 < X…
A: Given Information: Required : To find P(38 < X < 41) Z-score is a measure which indicates…
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A: Formula is given below.
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Q: 3) A normal distribution has a mean of µ = 80 with s = 12. Find the following proportions with the…
A: The value of (X < 74) is,
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Q: The grades in an exam have a normal distribution with μ=75 averages and σ=8 standard deviation. The…
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A: normal distribution μ = 34σ = 10 P(x<51) = ?
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A: Given: Population mean μ=125 Population standard deviation σ=14 Let X be normal distribution. X ~…
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A: Let X denote the scores on a mathematics exam and it follows normal distribution with mean of…
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A: Given,
Q: What is the z-score if µ = 79, σ = 8, and x = 85? -0.61 0.75 -1.31 1.87
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Q: A population of scores has μ = 80. In this population, a score of X= 92 corresponds to z = 5. what…
A: Given: μ = 80 z = 5 X= 92
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Q: A simple random sample of 40 items resulted in a sample mean of 25. The population standard…
A: Givensample size(n)=40sample Mean(x)=25standard deviation(σ)=5
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A: Given, z-score = 0.875 standard deviation = 0.0008
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Q: the heights of male adults are normally distributed with mean 1.7m and standards deviation 0.2m In a…
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Q: Blood pressure is distributed Normally, with a mean of 85 mm and a standard deviation of 20 mm.…
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A: Given: μ=36σ=5
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A: Given:Sample mean x ̅ = 75 and Standard deviation s = 10We have to find P(X > 95 ) = …?
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Q: A given distribution has a population meanof 129 and a population standard deviation, of 12. What…
A: Mean = 129 Standard deviation = 12 Raw score, X = 75
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A: We have given that, Population mean (u) = 44, raw score of population (X) = 40 and z- score = -1. 00…
Q: For a sample with a standard deviation of s=4, a score of X=35 corresponds to Z= -1.25. what is the…
A: Given,standard deviation(s)=4a score(X)=35Z-score=-1.25
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A:
Q: (n=203) report an average annual salary of 24,509, with a standard deviation of 622. Is this figure…
A: Given that,population mean(u)=25782sample mean, x =24509standard deviation, s =622number (n)=203
Q: A sumple from a normal population with mu = 50 and sigma = 6 of M=48.20, . the sample…
A: Given Information: Population mean μ=50 Population standard deviation σ=6 Sample mean (M) = 48.20…
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A: Interpretation: The percentage of x less than 58 is 75%. Explanation:Step 1:If k value is 2, Then…
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- In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be surveyed in order to be 99% confident that your sample mean is within 20 minutes of the population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 129 min. show formulas and draw all curves.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 = iOn the first quarterly examination in Statistics and Probability of the 100 students of Grade 11 senior high school, their exam scores have a mean of 87 and a standard deviation 4. c) What percentage of students have grades between 83 and 91? Gaussian Curve
- A Normal distribution has mean =28 and a standard deviation =5. A) find the z score corresponding to x =23. B) find the z score corresponding to x =39 C) find the raw score corresponding to z = -2 D) find the raw score corresponding to z = 1.7The annual rainfall in a certain region is modeled using the normal distribution shown below. The mean of the distribution is 36.5 cm and the standard deviation is 5.2 cm. In the figure, V is a number along the axis and is under the highest part of the curve. And, U and W are numbers along the axis that are each the same distance away from V. Use the empirical rule to choose the best value for the percentage of the area under the curve that is shaded, and find the values of U, V, and W. Percentage of total area shaded: (Choose one) ▼ 200 35 | 55 25 30 40 45 50 ( cm) Submit Continue |Privacy Center © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use DIl S0 FB F7 esc F3Use the formula to find the standard error of the distribution of differences in sample means, I – X2. Samples of size 270 from Population 1 with mean 74 and standard deviation 18 and samples of size 510 from Population 2 with mean 88 and standard deviation 24 Round your answer for the standard error to two decimal places. standard error =
- A quantity measured 50 times results in a mean x=23.345 +/- 0.0022 What is the standard deviation? What number of measurements will cut the standard deviation of the mean half? If a 100 measurement are taken, what is the new standard deviation?Suppose a variable is Normally distributed with μ=345 and sigma σ=30. What proportion of the data has values between 330 and 345? Use four decimal places in your answer.If x the mean of 12 determinations = 9.79, and μ the true value = 9.03, find out whether or not this result is significant provided the standard deviation(s) is 0.18.