x-20129P(x)0.10.30.20.30.1Find (?(?≥1)Find the expected value (mean) of ?.

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Answered: P(x) 0.1 0.3 0.2 0.3 0.1 Find (?(?≥1)…

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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Current Attempt in Progress State the null and alternative hypotheses for the situation described below for a statistical test. Testing to see if there is evidence that the mean time spent studying per week is different between first-year students and upperclass students. Let group I be the first year students and let group 2 be the upperclass students. T 11- Ho 11. O 11< e Textbook and Media Y #9 0 7 11/4 11 Pi 4₁ vs Ho * 11/2 A #p M Pi A Pi # P₂ # P2 #r #1 #p #Z #7₁ #Z₂ Attempts: 0 of 2 used Submit Answer PriSc Insert 67
H0:μ=12.8H0:μ=12.8H1:μ<12.8H1:μ<12.8Your sample consists of 45 subjects, with a mean of 12.3 and standard deviation of 1.27.Calculate the test statistic, rounded to 2 decimal places. You are conducting a study to see if the probability of a true negative on a test for a certain cancer is significantly less than 0.28. Your sample data produce the test statistic z=−2.672z Find the p-value accurate to 4 decimal places.
Data of variable-A is collected as shown to the right. Is the mean of Variable-A less than 80? State null hypothesis and choose level of significance, a = 0.05. (Use Excel ttest function, provide clear logic and reasoning.) Variable-A Variable-B 78.8 81.9 76.9 78.0 67.8 69.7 68.9 74.7 70.5 70.0 80.0 68.2 63.0 88.7 78.7 86.7 85.4 69.5 87.0 75.1 82.4 71.8 78.2 58.1 76.9 74.8 60.2 93.2 82.6 84.6 67.2 66.5 71.7 77.2 68.9 74.0 69.3 77.7 89.1 78.6 76.3 68.3 74.0 89.0 69.4 82.1 76.3 78.0 66.2 80.3 73.9 82.4 79.1 83.1 80.4 66.4 66.2 67.6 80.9 75.3
At test for a mean uses a sample of 25 observations. Find the t test statistic value that has a P-value of 0.10 when the alternative hypothesis is (a) H: μ#0, (b) H₂:μ>0, (c) H₂: μ<0. (a) Find the t test statistic value when H₂: μ‡0. (Round to three decimal places as needed.) ***
Find the standard deviation. Р(x) | x*Р(x) (x - 4)°P(x) 2 0.1 2(0.1) = 0.2 4 0.3 4(0.3) = 1.2 6 0.4 6(0.4) = 2.4 8 0.2 8(0.2) = 1.6 00
0.3507 x 0
You are conducting a study to see if the probability of a true negative on a test for a certain cancer is significantly less than 76%. With HA : p < 76% you obtain a test statistic of z = −2.14. Find the p-value accurate to 4 decimal places.p-value = P(z < -2.14) =I need help
Weights (X) of men in a certain age group have a normal distribution with mean ? = 170 pounds and standard deviation ? = 28 pounds. Find each of the following probabilities. (Round all answers to four decimal places.) (a) P(X ≤ 191) = probability the weight of a randomly selected man is less than or equal to 191 pounds. (b) P(X ≤ 156) = probability the weight of a randomly selected man is less than or equal to 156 pounds. (c) P(X > 156) = probability the weight of a randomly selected man is more than 156 pounds
K A population has a mean μ = 134 and a standard deviation o = 26. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 59. σ- The mean is μ- =, and the standard deviation is o- = (Round to three decimal places as needed.) X Z-
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P(x) 0.1 0.3 0.2 0.3 0.1 Find (?(?≥1) Find the expected value (mean) of ?.