2 Define the random variable, its distribution, and compute for the variable/measure that is being asked. You can follow the example below Ex. A large number of insects are expected to be attracted to a certain varietyof rose plant. A commercial insecticide is advertised as being 99% effective.Suppose 200 insects infest a rose garden where the insecticide has beenapplied. What is the probability that none of these insects can survive?Random variable: X – number of dead insectsDistribution: X-Bin(200,0.99)Computation: P[X = 200] = (200) + 0.99200 * 0.01° = 0.1340 An oil company conducts a geological study that indicates that an exploratoryoil well should have a 20% chance of striking oil. What is the mean number ofoil wells that must be drilled if the company wants to have five oil-striking wells?

Given Chane of striking oil = 20%

Answered: 2 Define the random variable, its…

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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56% of all statistics classes require a statistical calculator and 28% require the use of a computer that statistical software. Of the classes that require a statistical calculator, 14% also require the use of a computer. If a statistics course is selected at random find: (round to 4 decimal places where possible) a. P(Statistical Calculator) = %3D b. P(Statistical Software) = %3D c. P(Require a Statistical Calculator and Statistical Software) = d. P(Require a Statistical Calculator GIVEN Require Statistical Software) = %3D
Researchers studying starfish collected two independent random samples of 40 starfish. One sample came from an ocean area in the north, and the other sample came from an ocean area in the south. Of the 40 starfish from the north, 6 were found to be over 8 inches in length. Of the 40 starfish from the south, 11 were found to be over 8 inches in length. Which of the following is the test statistic for the appropriate test to investigate whether there is a difference in proportion of starfish over 8 inches in length in the two ocean areas (north minus south) ? 6−11640+1140√ A 6−110.1540+0.27540√ B 0.15−0.275(0.15)(0.275)(140+140)√ C 0.15−0.275(0.2125)(0.7875)(140+140)√ D 0.15−0.275(0.2125)(0.7875)140+140√
I need help with this one please thank you.
In a study, it was found that 42.5% of the population drink soda at least once a day. You randomly select 8 people. Let X be the number of people in the sample that drink soda at least once a day.Then X has what distribution?
Suppose you are playing a game and you get to roll 40 six-sided dice on your next turn. If you get a total of 160 or more from the 40 dice, you will win the game. Using sampling distributions, what is the probability that you will get a total of 160 or more with the 40 dice? Some useful things to know: When one six-sided die is rolled, the die roll (or number of spots showing) has a mean of 3.5 and a standard deviation of approximately 1.71.
What concept does the mean of a discrete random variable generalize?
Please list the letter choices thank you
Suppose 2 dice are rolled, and suppose the discrete variable x counts the number of 3’s that show up. Plot the probability distribution for x using a bar graph. What is the expected value for the random variable x? What is the variance for the random variable x?
You intend to conduct a independence for a contingency table with 6 categories in the column variable and 3 categories in the row variable. You collect data from 102 subjects. What are the degrees of freedom for the x² distribution for this test? d.f. =
The mean of a random variable will be negative if all possible values of the random variable negative. O True O False
What are the differences between the two types of random variables in statistics? B i U Font Family AAA = in O 0

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