Suppose that for a given computer salesperson, the probability distribution of x the number of systems sold in 1 month is given by the following table.12348.P(x)0.050.100.120.300.300.110.010.01(a) Find the mean value of x (the mean number of systems sold).(b) Find the.variance and standard deviation of x. (Round your standard deviation to four decimal places.)variancestandard deviationHow would you interpret these values? (Round your standard deviation to four decimal places.)The mean squared deviation from the mean number of systems sold in one month isA typical deviation from the mean number ofsystems sold in one month is(c) What is the probability that the number of systems sold is within 1 standard deviation of its mean value?1. (d) What is the probability that the number of systems sold is more than 2 standard deviations from the mean?

Answered: Suppose that for a given computer…

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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Ryan is throwing a football through a tire in his backyard. He has the probability of .30 of throwing the ball through the tire on each attempt, and each attempt is independent of the one before. Draw the graph of the PDF for the first five attempts. What does the graph tell you about the mean and standard deviation?
A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. If 64 applications are randomly selected, what is the probability that the mean credit rating of these 64 applicants will be between 205 and 275. (Round your answer to 4 decimal places.) (Calculator: http://statisticshelper.com/normal-distribution-calculator) A. 0.5011 B. 0.4113 C. 0.2119 D. 0.3664
(a) Approximate the mean and standard deviation. Round each to two decimals. (b) Complete the last two columns in the table above for relative frequency and cumulative frequency. Round any decimals to 3 places. Do not include the zero before the decimal. For example for 0.56, enter .56 (c) What is the shape of the distribution?
In a study, 25,000 adults were randomly surveyed as to the number of grandchildren they have, X. The probability distribution is given below. Find the mean and the standard deviation of the probability distribution using a TI-83, TI-83 Plus, or TI-84 graphing calculator. Round the mean to one decimal place and the standard deviation to two decimal places. x P(x) 0 0.01 1 0.02 2 0.02 3 0.24 4 0.35 5 0.20 6 0.07 7 0.05 8 0.02 9 0.01 10 0.01
Find the variance and standard deviation. Round the variance to two decimal places and standard deviation to at least three decimal places.
Accrotime is a manufacturer of quartz crystal watches. Accrotime researchers have shown that the watches have an average life of 36 months before certain electronic components deteriorate, causing the watch to become unreliable. The standard deviation of watch lifetimes is 4 months, and the distribution of lifetimes is normal.
The weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 3282 grams and a variance of 349,281. If a newborn baby boy born at the local hospital is randomly selected, find the probability that the weight will be less than 4227 grams. Round your answer to four decimal places. Answer esc If you would like to look up the value in a table, select the table you want to view, then either click the cell at the intersection of the row and column or use the arrow keys to find the appropriate cell in the table and select it using the Space key. alt gle. 1 1 9 a Z F @ 2 W S X # 3 e d C C $ 4 r f % 5 V t Normal Table-to-z Normal Table - to z Oll 6 g L b y hp h & 7 。。 * u n * 8 N ( 9 m j|k الالال O < O alt р Tables ctrl Keypad Keyboard Shortcuts. Submit Answer [ اااك AD + = ? 1 Oct 28 1:47 0 backspace 1 USE YOUR SMARTPHONE FOR Reviews Videss-Features Specs Support

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