ve the problem.6) For large numbers of degrees of freedom, the critical x2 values can be approximated as follows:where k is the number of degrees of freedom and z is the critical value. To find the lower criticalvalue, the negative z-value is used, to find the upper critical value, the positive z-value is used.Use this approximation to estimate the critical value of x2 in a two-tailed hypothesis test withn = 144 and a = 0.10.A) x² = 116.985 and x2 = 172.721(O x2 = 121.710 and x2 = 164.928B) x2 .= 122.635 and x2 - 166.004D) x2 = 116.082 and x2 = 171.624%3D

Given Data n = 144 D.O.F(k) = n – 1 = 144 -1 = 143 Significance level (α) = 0.1 Finding the…

Answered: ve the problem. 6) For large numbers of…

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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If the t-computed value is 2.115 and the critical value is 2.423, what will be the decision? a. Reject the null hypothesis. b. Do not reject the null hypothesis. c. Reject both the null and alternative hypotheses. d. Support both the null and alternative hypotheses.
If the computed value is greater than the critical value, then we ______________. a. retain the null hypothesis b. reject the null hypothesis c. support the null hypothesis d. fail to reject the null hypothesis
what is 1. P value 2. Z value 3. Critical value 4. Reject or do not reject 5. State conclusion
A random sample of 100 students at a high school was asked whether they would ask their father or mother for help with a financial problem. A second sample of 100 different students was asked the same question regarding a dating problem. If 43 students in the first sample and 47 students in the second sample replied that they turned to their mother rather than their father for help, test the hypothesis of no difference in the proportions. Use α = 0.02. Identify the critical value(s). 2.33 ±2.33±2.33 ±2.05±2.05 2.05
A commonly cited study says that 49% of students study less than 5 hours per week. A researcher does not think this is accurate and wants to show that the percentage of students that study less than 5 hours per week is not equal to 49%. Identify the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the parameter p.
If you have a two-tailed test with an alpha of .05, what is the critical value when n = 22? If you have a one-tailed test with an alpha of .05, what is the critical value when n = 158?
28. A friend notices that as shoe size increases, ring size also increases. He asks 8 friends to report both shoe size and ring size, predicting that as one increases, the other increases. Test this hypothesis using α = .05 Question text For this problem 1. State the hypothesis in words (be very specific) 2. State the statistical hypotheses (H1 and Ho) 3. State the α level = 4. State the decision rule and be sure to include the critical value
An urban community wants to show that the incidence of breast cancer is higher in their locality than in a neighboring rural area. (PCB levels were found to be higher in the soil of the urban community). If you find that in the urban community 20 out of 200 adult women have breast cancer and that in the rural community 10 out of 150 adult women have it, could you conclude, at a significance level of 0.05, that breast cancer is more prevalent in the urban community?1. The parameter of interest is:2. The hypotheses for this test are:3. The calculated test statistic is:4. The critical region is:5. Draw the critical region (make decision):6. It can be concluded that:
If the null hypothesis is h = h0 (here h denotes the population parameter of interest.) and the alternate hypothesis is h > h0 then we perform a two-tail hypothesis testing. True or False
According to research, of all U.S. households that owned at least one TV set, 83% had two or more sets. A local cable company canvassing the town to promote a new cable service found that of the 295 households visited, 230 had two or more TV sets. At (alpha) = 0.10, is there sufficient evidence to conclude that the proportion is less than the one in the report? A. State the hypotheses and identify the claim with the correct hypothesis. B. Find the critical value(s). C. Compute the test value. D. Make the decision. E. Summarize the results.
Find the critical value, the computed t-value, and whether to reject or accept the null hypothesis.
In a clinical study, a random sample of 540 participants agree to have their blood drawn, which is to be examined for the presence of antibodies against a certain contagious disease. It is found in 22% of the blood samples, which experimenters hope to extrapolate to the general population. From this random sample, 10 participants' blood samples are selected at random. If X is the number of samples out of the 10 who have these antibodies, what can we say about X? A. The sample size is not large enough for us to approximate X using a normal distribution B.The expected value of X is 22 C. X can be approximated using a normal distribution in lieu of a binomial distribution D. X has a sampling distribution that is normal

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