Statistics, Course Project Part B

Keller Graduate School of Management Project Part B: Answer a. In this part of the project I am going to examination the managers claim that the add up mean yearbook income was less than $50,000. The supposition examineing is done through and through the sideline steps: The bootless meditation H0 is that the mean p.a. income ? is get even to $50,000. H0:? = $50,000. The alternative hypothesis H1 is that the mean one-year income ? is less than $50,000. H1:? < $50,000 importation level chosen is 5% or ? = 0.05 Here, the population modular deviation is unknown. therefore, we use a t statistic Therefore the try statistic used is t = X-?S/n follows a t distribution with n-1 degrees of freedom From the t board agree to 0.05 opportunity, the critical take to be t? =1.6766. Hence the critical region is t < -1.6766. Alternatively, we baulk the fruitless hypothesis, if the p shelter is less than the conditional relation level change the value we get t = 43.74-5014.6396/50 = -3.02 The p value corresponding to t = -3.02 and 49 d.f. is 0.002 which is elfiner than the signification level. The value of the footrace statistic is in the critical region and hence it is significant.

Therefore, we reject the bootless hypothesis at 5% level of significance. The p-value is 0.002 which is littleer than the significance level. Hence there are 0.002 chances that such a small value can observe when the null hypothesis is true. Since, this luck is smaller than the significance level we reject the null hypot hesis at 5% level. Hence, we conclude th! at there is enough press out to support the managers claim that the average yearbook income was less than $50,000. b. The claim is that the true population proportion of customers who get in an urban area exceeds 40%. In the disposed up sample of size 50, thirteen are from the urban. The null hypothesis H0 is that the population proportion of customers who live in an urban is 40%. H0:p = 0.40. The...If you want to get a expert essay, order it on our website: OrderCustomPaper.com

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