Need help with this stat homework problem A researcher wants to test the hypothesis that heating will increase the diameters of girdars. In a sample of nine girdars the changa in diameter (in millimetars) after heating was as follows:0 125 0 159 0 259 0277 0 135 0 0.224 0 0 05Test the hypothesis that heating increases the diameter at the level of significance 0.01.Oa. The p-value is 0.002. Consequently, we reject the null hypothesisOb. The bacjground conditions are not satisfied. Thus, we cannot carry out this hypothesis test.O. The p-value is 0.03. Consequently, we fall to reject the null hypothesis.O d. The p-value is 0.005. Consequently, we reject the null hypothesis.

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Answered: Test the hypothesis that heating…

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 vending machine company wants to check three of its machines to determine if they are properly dispensing 12 ounces of coffee. Test by using α=0.05. Their data is given below. Machine A Machine B Machine C 11.8 11.7 12.2 12.1 11.9 12.1 12.0 11.7 12.0 11.9 11.8 11.9 12.1 12.0 12.2 Group of answer choices There is sufficient evidence to reject the claim that the proportions are equal because the p-value 0.0255 < 0.05 There is insufficient evidence to conclude the claim that the proportions are equal because the p-value 0.0255 < 0.05 There is insufficient evidence to reject the claim that the proportions are equal because the p-value 0.0255 < 0.05 There is sufficient evidence to conclude the claim that the proportions are equal because the p-value 0.0255 < 0.05
An article includes the accompanying data on compression strength (lb) for a sample of 12-oz aluminum cans filled with strawberry drink and another sample filled with cola. Beverage Sample Size Sample Mean Sample SD Strawberry Drink 10 535 24 Cola 10 559 15 Does the data suggest that the extra carbonation of cola results in a higher average compression strength? Base your answer on a P-value. (Use ? = 0.05.) State the relevant hypotheses. (Use ?1 for the strawberry drink and ?2 for the cola.) H0: ?1 − ?2 = 0Ha: ?1 − ?2 ≥ 0H0: ?1 − ?2 = 0Ha: ?1 − ?2 ≠ 0 H0: ?1 − ?2 = 0Ha: ?1 − ?2 < 0H0: ?1 − ?2 = 0Ha: ?1 − ?2 > 0 Calculate the test statistic and determine the P-value. (Round your test statistic to one decimal place and your P-value to three decimal places.) t = P-value = State the conclusion in the problem context. Reject H0. The data suggests that cola has a higher average compression strength than the strawberry drink.Reject H0. The…
The true average diameter of ball bearings of a certain type is supposed to be 0.5 in. A one-sample t test will be carried out to see whether this is the case. What conclusion is appropriate in each of the following situations? (a) n = 12, t = 1.56, ? = 0.05 Reject the null hypothesis. There is sufficient evidence that the true diameter differs from 0.5 in.Reject the null hypothesis. There is not sufficient evidence that the true diameter differs from 0.5 in. Do not reject the null hypothesis. There is sufficient evidence that the true diameter differs from 0.5 in.Do not reject the null hypothesis. There is not sufficient evidence that the true diameter differs from 0.5 in. (b) n = 12, t = −1.56, ? = 0.05 Reject the null hypothesis. There is sufficient evidence that the true diameter differs from 0.5 in.Reject the null hypothesis. There is not sufficient evidence that the true diameter differs from 0.5 in. Do not reject the null hypothesis. There is sufficient evidence…
The effectiveness of a new bug repellent is tested on 1616 subjects for a 10 hour period. (Assume normally distributed population.) Based on the number and location of the bug bites, the percentage of surface area exposed protected from bites was calculated for each of the subjects. The results were as follows: ?⎯⎯⎯=92x¯=92, ?=13 s=13 The new repellent is considered effective if it provides a percent repellency of at least 9090. Using ?=0.05α=0.05, construct a hypothesis test with null hypothesis ?≤90μ≤90 and alternative hypothesis ?>90μ>90 to determine whether the mean repellency of the new bug repellent is greater than 9090 by computing the following: (a) the degree of freedom (b) the test statistic The final conclusion is A. There is not sufficient evidence to reject the null hypothesis that ?≤90μ≤90. Our results do not provide enough evidence that the new bug repellent is effective. B. We can reject the null hypothesis that ?≤90μ≤90. Our results indicate that…
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The tests of assumptions for yield gave values for Levene’s statistic and Shapiro-Wilk’s as 0.0562 and .00271, respectively. At a=0.05 , which statistical test is most appropriate to compare the yield among the nitrogen rates? a. Cochran’s Q B. Friedman’s C. Kruskal Wallis test . D. Anova F-test
A vending machine company wants to check three of its machines to determine if they are properly dispensing 12 ounces of coffee. Test by using α=0.01. Their data is given below Machine A Machine B Machine C 11.8 11.7 12.2 12.1 11.9 12.1 12.0 11.7 12.0 11.9 11.8 11.9 12.1 12.0 12.2 A. There is insufficient evidence to conclude the claim that the proportions are equal because the p-value 0.0255 >0.01 B. There is sufficient evidence to reject the claim that the proportions are equal because the p-value 0.0255 > 0.01 C. There is insufficient evidence to reject the claim that the proportions are equal because the p-value 0.0255 > 0.01 D. There is sufficient evidence to conclude the claim that the proportions are equal because the p-value 0.0255 >0.01
A random sample of 480 observations produced a sample proportion equal to 0.33. Find the critical and observed values of z for the following test of hypotheses using α=0.01. H0: p=0.30 versus H1: p>0.30. Round your answers to two decimal places. zcritical= zobserved=
Arandom sample of 450 observations produced a sample proportion equal to 0.38. Find the critical and observed values of z for the following test of hypotheses using alpha = 0.025 . H 0 :p=0.30 versus H 1 :p not equal to 0.30
A sample of 12 radon detectors of a certain type was selected, and each was exposed to 100 pCi/L of radon. The resulting readings were as follows: 104.3 89.6 89.9 95.6 95.2 90.0 98.8 103.7 98.3 106.4 102.0 91.1 a)Does this data suggest that the population mean reading under these conditions differs from 100? State and test the appropriate hypotheses using =.05. b) Suppose that prior to the experiment, a value of teta=7.5 had been assumed. How many determinations would then have been appropriate to obtain beta=.10 for the alternative u=95 ?
The toll plaza on Route 1 in Dover has four tollbooths open to all vehicles. Ms. Timlin conducted a chi-square goodness of fit test to see if all of the booths are used in equally. A chi-square value of 23.4 was calculated, resulting in a p-value of 0.006. Which of the following is correct? a. There is sufficient evidence to suggest that the tollbooths are not used in equal proportions. Selected:b. There is sufficient evidence to suggest that the tollbooths are used in equal proportions.This answer is incorrect. c. The tollbooths are used in equal proportions. d. There is insufficient evidence to suggest that the tollbooths are used in equal proportions. e. There is insufficient evidence to suggest that the tollbooths are not used in equal proportions.
A z-score of –1.6 has a corresponding Stanine score of:

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