I Date in the repetitvedistribution ta ble is-110-12-14517claises o- 214- 6-810-/2-142Calculate the orange?®standard deviation.?

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Answered: I Date in the repetitve distribution ta…

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 number of ants per acre in the forest is normally distributed with mean 42,000 and standard deviation 12,243. Let X = number of ants in a randomly selected acre of the forest. Round all answers to 4 decimal places where possible.a. What is the distribution of X? X ~ N(___,___) b. Find the probability that a randomly selected acre in the forest has fewer than 51,308 ants. c. Find the probability that a randomly selected acre has between 43,676 and 53,243 ants. d. Find the first quartile. ants (round your answer to a whole number)
1. What symbol (letter) do you use in the Ho and Ha if your problem involves means? 2. What symbol (letter) do you use in the Ho and Ha if your problem involves proportions? 3. What symbol (letter) do you use in the Ho and Ha if your problem involves standard deviations?
2. The number of pages in a PDF document you create has is randomly distributed between 5 and 9 pages, where all values are equally likely. What are the mean and standard deviation of the number of pages in the document2
: Tubes are manufactured in a company that has a mean of life, (hr = 800) and a standard deviation of 10 hours. Find a mechanism for a random sample n = tube 64 if the arithmetic mean lies: more than 810 hours. Less than 780 hours 24
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Claim: The mean pulse rate (in beats per minute) of adult males is equal to 68.6 bpm. For a random sample of 158 adult males, the mean pulse rate is 67.1 bpm and the standard deviation is 11.4 bpm. Complete parts (a) and (b) below. a. Express the original cialm in symbolic form. bpm (Type an integer or a decimal. Do not round.) b. Identify the null and alternative hypotheses. Ho: bpm
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Four-year-olds in China average 3 unsupervised hours per day. Most of the unsupervised children live in rural areas, considered safe. Suppose that the amount of unsupervised time is normally distributed with standard deviation 0.5 . A Chinese 4-year-old is randomly selected from a rural area. We are interested in the amount of time the child spends alone per day. In each appropriate box you are to enter either a rational number in "p/q" format or a decimal value accurate to the nearest 0.01 a. (3%) In words, the random variable X in which we are interested is defined by X = (pick one) b. (3%) Find the probability that the child spends less than one hour per day unsupervised. P(X 10) = d. (3%) The 70th percentile of the distribution of unsupervised time is given by P(X < = 0.70 .
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Suppose that the number of Facebook friends users have is normally distributed with a mean of 149 and a standard deviation of about 41. Assume fifteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of x̄? x̄ - N -----------, ---------- b. For the group of 15, find the probability that the average number of friends is less than 156. ------------- c. Find the first quartile for the average number of Facebook friends. Round to 2 decimals places. --------------- d. For part b), is the assumption that the distribution is normal necessary? ------------No, --------- yes

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I Date in the repetitve distribution ta ble is 10-/2-14 claises o-214- 6-8 517 2 Calculate the o renge? ®standard deviation.?