If the average test score is 61 with a standard deviation 3, then between which score limits at least 75% of the test scores (useChebyshev's Theorem)?O 52 and 62O 55 and 67O 51 and 71O 51 and 63

The average test score is 61 with a standard deviation 3.

Answered: If the average test score is 61 with a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Claim: The mean pulse rate (in beats per minute) of adult males is equal to 68.7 bpm. For a random sample of 169 adult males, the mean pulse rate is 68.9 bpm and the standard deviation is 11.5 bpm. A. Express the original claim in symbolic form. B. Identify the null and alternative hypotheses.
A cereal manufacturer claims that the gross weight (including packaging) of a box of cereal labeled as weighing 12 oz has a mean of 12.2 oz and a standard deviation of 0.1 oz. You gather 75 boxes and weigh them all together. Let S denote the total weight of the 75 boxes of cereal. a) If the claim is true, what is P(S ≤ 914.8)? b) Based on the answer to part (a), if the claim is true, is 914.8 oz an unusually small total weight for a sample of 75 boxes? c) If the total weight of the boxes were 914.8 oz, would you be convinced that the claim was false? Explain. d) If the claim is true, what is P(S ≤ 910.3)? e) Based on the answer to part (d), if the claim is true, is 910.3 oz an unusually small total weight for a sample of 75 boxes? f) If the total weight of the boxes were 910.3 oz, would you be convinced that the claim was false? Explain.
A variable is normally distributed with mean 12 and standard deviation 4 a.) find the percentage of all possible values of the variable that lie between 4 and 16 b.) find the percentage of all possible values of the variable that exceed 6 c.)find the percentage of all possible values of the variables that are less than 2
Parts e and f
37 - Find the standard deviation. Si f 3 3 5 7 7 5 a) 1.49 B) 5.77 NS) 2.21 D) 4.88 TO) 1.94
What is the difference between s and o- ? O A. s is the standard deviation of a sample, and o- is the standard deviation of the population that the sample came from O B. s and o- are the same standard deviation O C.s is the standard deviation of all samples and o- is the standard deviation of a single sample O D.s is the standard deviation of a sample, and o- is the standard deviation of all sample means O E. s is the standard deviation of the population and 0 – is the standard deviation of all sample means
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c) If the probability that a person scores below a particular value is 0.7, then the probability a person scores above that value equals? d) If the probability that a person scores between a particular positive z value and the mean is 0.31, then the probability a person scores above that value equals?
The standard deviation of pulse rates of adult males is more than 10 bpm. For a random sample of 130 adult males, the pulse rates have a standard deviation of 10.7 bpm. Express the original claim in symbolic form.

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If the average test score is 61 with a standard deviation 3, then between which score limits at least 75% of the test scores (use Chebyshev's Theorem)? O 52 and 62 O 55 and 67 O 51 and 71 O 51 and 63