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Request-Chegg Tutors × .. Cengage / yi Test 4M1213 F17 .> C | www.webassign.net/web/Student/Assignment-Responses/last?dep-17598932 : Apps D Registration Holds control Panel in Wir Bookmarks Physics-BUS 1120 C 9 How Do l Change M -derivative Nelnet Campus Com EZTV TV Torrents 0 8. +-111 points BBUnderStat10 10.3.004 My Notes Ask Your T Letx-age in years of a rural Quebec woman at the time of her first marriage. In the year 1941, the population variance of x was approximately 2-5.1. Suppose a recent study of age at first marriage for a random sample of 31 women in rural Quebec gave a sample variance s2 = 2.4. Use a 10% level of significance to test the claim that the current variance is less than 5.1. Find a 95% confidence interval for the population variance (a) What is the level of significance? State the null and alternate hypotheses. (b) Find the value of the chi-square statistic for the sample. (Use 2 decimal places.) What are the degrees of freedom? What assumptions are you maing about the original distribution? O We assume a uniform population distribution. O We assume a binomial population distribution. O we assume a exponential population distribution we assume a normal population distribution. ENG 12:26 AM US 12/8/2017 | Desktop ^

Explanation / Answer

Level of significance = 0.05

Null and alternate hypothesis - Option D

chi-square = (N-1)(s/sigma)^2
= (31 - 1)*(2.4/5.1)
= 14.1176

DF = 30

We assume normal popualtion

p-value = 0.00614

Part D - Option B

Part E - option C

option B

s 1.549193 n 31 CI 95% alpha 5% chi square value for lower bound 46.97924 chi square value for upper bound 16.79077 lower bound 1.532592 upper bound 4.28807

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