Answered: If the observed statistic exceeds the…

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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A test of H0: µ ≥ 59 versus H1: µ < 59 is performed using α = 0.05. The value of the test statistic z = -1.80. If the true value of µ is 59, does the conclusion you reach result in Type I error, Type II error, or the correct decision? a. Type I Error b. Type II Error c. correct decision d. not enough information
Match each Test Situation with the correct Critical Value. For a two-sided test, find only the positive value. Test Situation Ha: P1 P2 + 0 and a = 0.001 Ha:Pi – P2 7 0 and a = 0.02 Ha:P1 – p2 0 and a = 0.005 Ha: P1 – P2 > 0 and a = 0.04 Critical Value a. 1.751 b. 2.326 с. 2.576 d. -1.960 е. 3.291
Given H0 : =μ23, Ha : ≠μ23, and =P0.029 . Do you reject or fail to reject H0 at the 0.01 level of significance? fail to reject H0 not sufficient information to decide reject H0
A new insecticide is advertised to kill more than 95% roaches upon contact. In a laboratory test, the insecticide was applied to 400 roaches and 384 died immediately after contact. Is this sufficient evidence to support the advertised claim? Use α=0.05. (c) p-value for the problem above i
p 15 Is sunscreen with an SPF 30 rating more effective at preventing sunburn than sunscreen with an SPF 15 rating? At the alpha = 0.05 level of significance, test the claim that SPF 30 sunscreen is better at preventing sunburn than 15 sunscreen. Let represent the proportion of SPF 15 sunscreen wearers who get a sunburn and represent the proportion of SPF 30 sunscreen wearers who get a sunburn. (Round your results to three decimal places) 1. Which would be correct hypotheses for this test? O O H 0 :p 15 =p 30 , H 1 :p 15 ne p 30 H 0 :p 15 =p 30 , H H 1 :p 15 <p 30 O H 0 :p 15 <p 30 ,H 1 :p 15 >p 30 O H 0 :p 15 =p 30 H 1 :p 15 >p 30 A random sample of 250 beach-goers were given SPF 15 sunscreen and asked to lay in the sun for 1 hour10 of them later reported a sunburn. Another random sample of 250 beach- goers were given SPF 30 sunscreen and asked to lay in the sun for 1 hour. 7 of them later reported a sunburn. 2.Find the test statistic 3. Give the P-value: answer only…
A special diet is fed to adult turkeys to see if they will gain weight. The before and after weights in pounds are shown. At α= 0.05, test the claim to see if the diet results in a higher weight. Before 28 24 29 30 32 33 25 26 28 After 30 29 31 32 32 35 29 25 31 A. What is the test statistic? B. What is the critical value?
The test statistic of z=−2.31 is obtained when testing the claim that p=1/2. a. Using a significance level of α=0.05,find the critical value(s). b. Should we reject H0 or should we fail to reject H0?
12c: One researcher estimated that smoking reduces the sense of smell. The mean of the odor test for non-smokers is μ=18.4. The following scores were obtained by giving the same odor test to an unbiased sample of a cigarette smokers: 16 14 19 17 16 17 15 18 19 12 14 18 c) What is the critical t value for alpha=.05?
Match each Test Situation with the correct Critical Value. For a two-sided test, find only the positive value. Test Situation Two samples, 1 = 25.3, I2 H.: P1 - 2 po, and a 0.01 %3D Two samples, n = 28, Ha: µd > 0, and a 0.01 dv One sample, ni = - 35, п2 41, Ha: p1 – p2 0, and a = 0.01 %3D %3D One sample of x's and y's, n = 114, Ha: p < 0, and a = 0.001 One sample, o is known, n = 68, Ha:µ # Ho, and a = 0.05 One sample, o is unknown, n = 76, H. : µ < Ho, and a 0.05 Critical Value a. 1.960 b. -3.165 C. 2.473 d. 2.326 e. 2.576 f. -1.294 g. -1.665 h. 2.426
Please see attached statistical mathematics question. How to find the constant c so that the signicance level is alpha = 0.05.and determine the power function of the test?
A banker, who works at a credit union, is interested in studying the average percent of banking fees customers per on a monthly basis. It is known that the average monthly banking fee is 9 dollars. The banker believes the average monthly banking fee has increased. What are the hypotheses? Fill in the blanks with the correct symbol (=,#,) to represent the correct hypothesis. Sorry, that's incorrect. Try again? null hypothesis :H 19 alternative hypothesis : µ 9

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If the observed statistic exceeds the critical ratio, what can we say about the p value with respect to the alpha level? A. p < α B. p > α