sho4028.5 minPopulation standard deviationdev35.2 min7.2 minnatSource: www.census.gov9.1 minSouO Heights of 9-Year-Olds At age 9 the average weight13. P(21.3 kg) and the average height (124.5 cm) for bothboys and girls are exactly the same. A random sampleof 9-year-olds yielded these results. At a = 0.05, do thefodata support the given claim that there is a difference inheights?BoysGirls6050Sample sizeMean height, cm123.5126.212098Population varianceSource: www.healthepic.comnital Stays The average length of “shorthat for

Answered: Image /qna-images/answer/fbafb508-0bf3-4591-a09e-8e925ca41bc4.jpg

Answered: sho 40 28.5 min Population standard…

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 life of Sunshine CD players is normally distributed with mean of 4.2 years and a standard deviation of 1.1 years. A CD player is guaranteed for three years. We are interested in the length of time a CD player lasts. Find the 85th percentile of the distribution for the time a CD player lasts. Round your answer to two decimal places, if necessary. The 85th percentile is______.
Part d) where does the 0.675 come from?
Maple tree diameters in a forest area are normally distributed with a mean of 10 inches anda standard deviation of 3 inches. In a forest of 1000 maple trees, how many would have adiameter greater than 13 inches. Hint: think of the properties of a normal graph.
Heights of adult women are normally distributed with a mean of 64 inches with a standard deviation of 2.5 inches. What approximate height is at the 84th percentile? OA. 61.5 inches O B. 66.5 inches O C. 69 inches O D. 64 inches
Consider a value to be significantly low if its z score less than or equal to -2 or consider a value to be significantly high if its z score is greater than or equal to 2. A data set lists weights (grams) of a type of coin. Those weights have a mean of 5.30979 g and a standard deviation of 0.06539 g. Identify the weights that are significantly low or significantly high. .BBE What weights are significantly low? Select the correct answer below and fill in the answer box(es) to complete your choice. O A. Weights that are greater than (Round to five decimal places as needed.) O B. Weights that are between and (Round to five decimal places as needed. Use ascending order.) OCWeights that are less than (Round to five decimal places as needed.)
1. Following are the marks obtained by two students A and B in 10 sets of examination: Sets 3 76 4 7 9 10 Marks 14 80 48 52 72 68 56 60 64 obtained by A Marks 48 75 54 60 63 69 72 51 57 56 obtained by B If the consistency of performance is the criteri on for awarding the prize,who should get the prize? 8. in 2.
The lifetimes of lightbulbs of a particular type are normally distributed with a mean of 400 hours and a standard deviation of 10 hours. What percentage of the bulbs have lifetimes between 380 hours and 420 hours? 99.7% 95% 68% 84%
Consider a value to be significantly low if its z score less than or equal to - 2 or consider a value to be significantly high if its z score is greater than or equal to 2. A data set lists weights (grams) of a type of coin. Those weights have a mean of 5.62152 g and a standard deviation of 0.05197 g. Identify the weights that are significantly low or significantly high. What weights are significantly low? Select the correct answer below and fill in the answer box(es) to complete your choice. O A. Weights that are greater than . (Round to five decimal places as needed.) (Round to five decimal places as needed.) B. Weights that are less than C. Weights that are between and. (Round to five decimal places as needed. Use ascending order.)
Assume that adults have IQ scores that are normally distributed with a mean of 98.4 and a standard deviation 18.1. Find the first quartile Q₁, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is (Type an integer or decimal rounded to one decimal place as needed.) www
A quantitative data set has mean 25 and standard deviation 4. Apply Chebyshev's rule to complete parts (a) and (b) below. Question content area bottom Part 1 At least 89% of the observations lie between which two values?

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