A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean scorefor the writing section was 51.4, with a standard deviation of 11.0. Based on this information, complete the following statements about the distribution of thescores on the writing section for the recent year.C(a) According to Chebyshev's theorem, at least 84% of the scores liebetween and. (Round your answer to 1 decimal place.)X6?of the(b) According to Chebyshev's theorem, at least (Choose one) ▼scores lie between 29.4 and 73.4.Continuee2022 McGraw▸tabesc!1←qa@2WS#3aeCd$4r%5facerDllAt106gyað&7hu8ji

Answered: Image /qna-images/answer/cf3b92e6-e337-4e54-9c24-198341e27660.jpg

Answered: A nationwide test taken by high school…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The flashlight batteries produced by one of the northern manufacturers are known to have an average life of 50 hours with a standard deviation of 6 hours. Use Chebyshev's theorem to answer the following questions. (a) At least what percentage of flashlights will have a life of 41 to 59 hours? (Round your answer to two decimal places.) % (b) At least what percentage of the batteries will have a life of 20 to 80 hours? % (c) Determine an interval for the lives (in hours) of the batteries that will be true for at least 60% of the batteries. (Hint: First compute the Z-score. Round your answers to two decimal places.) hours to hours
There are dozens of personality tests available on the World Wide Web. One test, scored on a scale of O to 200, is designed to give an indication of how "personable" the test taker is, with higher scores indicating more "personability. Suppose that scores on this test have a mean of 107 and a standard deviation of 20. Complete the following statements about the distribution of scores an this personality test. (a) According to Chebyshev's theorem, at least 36% of the scores lie between and . (Round your answer to the nearest whole number.) (b) According to Chebyshev's theorem, at least of the scores lie between 67 and 147.
#2) A large warehouse installed a security system a few years ago. Under an older system the managers estimated that they were losing an average of $678 worth of goods to thieves each week. A random sample of 36 weekly records under the current system showed that they were still losing an average of $650 worth of goods each week. The sample standard deviation was s = $93. Does this indicate that the average loss is different (either more or less) than the previous $678 per week? Use a 5% level of significance.
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80, In a recent year, the national mean score for the writing section was 52.0, with a standard deviation of 11.0. Based on this information, complete the following statements about the distribution of the scores on the writing section for the recent year. (a) According to Chebyshev's theorem, at least 56% of the scores lie between O and . (Round your answer to 1 decimal place.) (b) According to Chebyshev's theorem, at least ? v of the scores lie between 30.0 and 74.0.
A doctor measured serum HDL levels in her patients, and found that they were normally distributed with a mean of 63.3 and a standard deviation of 3.9. Find the serum HDL levels that correspond to the following z-scores. Round your answers to the nearest tenth, if necessary.(a) z = -1.1(b) z = 2.14
Suppose the following data show the introductory interest rates on a sample of 5 credit cards: 6, 2.7, 3.3, 5.6, 3.7. Calculate the standard deviation of the sample. Note: the numbers may be different from the last problem. (please express your answer using 2 decimal places)
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 49.1, with a standard deviation of 9.2. Based on this information, complete the following statements about the distribution of the scores on the writing section for the recent year. A) according to Chebysheva theorem, at least 36% of the scores lie between ? And ?. Rouen answer to 1 decimal. B) according to Chebyshev’s theorem, at least what perfect of the scores lie between 30.7 and 67.5 ?
solve the following problems Based on a survey, the mean weekly allowance of the Grade 11 students of XZY University is ₱750.00 with a standard deviation of ₱100.00. Assuming that the weekly allowance is normally distributed, what is the z-score of a student with a weekly allowance of: a. ₱950.00 b. ₱600.00
A nationwide test taken by high school sophomores and junices has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 51.5, with a standard deviation of 9.0. Based on thes information, complete the following statements about the distritbution of the scores on the writing section for the recent year. (a) According to Chebyshev's theorem, at least E(about 89) ofr the scores lie between and (Round your answer to 1 deomal place.) (b) According to Chebyshev's theorem, at least (Choose one) of the scores lie between 33.5 and 69.5,
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 47.4, with a standard deviation of 9.2. Based on this information, complete the following statements about the distribution of the scores on the writing section for the recent year. (a) According to Chebyshev's theorem, at least (Choose one) of the scores lie between 29.0 and 65.8. (b) According to Chebyshev's theorem, at least (Choose one) ▼ scores lie between 33.6 and 61.2. of the X 3 4
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 50.2, with a standard deviation of 9.4. Based on this information, complete the following statements about the distribution of the scores on the writing section for the recent year. (a)According to Chebyshev's theorem, at least of the scores lie between 31.4and 69.0. (b)According to Chebyshev's theorem, at least ▼(Choose one) of the scores lie between 22 and 78.4. The answers will be one of these percents 36,56,75,84,89
The lengths of pregnancies in a small rural village are normally distributed with a mean of 267 days and a standard deviation of 15 days.In what range would you expect to find the middle 95% of most pregnancies?Between and .If you were to draw samples of size 55 from this population, in what range would you expect to find the middle 95% of most averages for the lengths of pregnancies in the sample?Between and .

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