Question

mean of population = 1.68

I already have the null and the alternative hypothesis

I only need help with 2, 4 and 5

Instructions: For this discssion, everyone in the class wil telme how maxy siblings they have Use the chart below to gather this data. Place a ckeck mark next in the appropriate "Namber of Sblings" row each time a class member mentions that umber For example, if someone has three siblings then put vin the row or Three Siblings. When all students have finished gwn b umber of siblings, add up the vs in eack row to get the total Find tke mean for the total population fall students present in the class). (Put each time the category applies) ing wo siblings ings Now, your instractor will choose four students at random from the class. Your job is to tell me if these four stdents differ in te number of siblings that they have compared to the average for the population. Remember that you need to caiculate the popwlation standard deviation first! Your job is to determine if the number of siblings for our sample (The average of Students A, B, C, and D) differ significantly from what you would expect given the population of this class. As you work on this problem, make sure to provide information for each of the eight steps we cover in Chapter 10 (Salkind) as well as the APA write-up you would see in a results section. Remember, you need to calculate the population standard deviation first (You can use the chart at the end of this document) 1. State the null and altemative hypotheses 2. Tell me your level of risk 4. Compute the test statistic (Show your work either below or on scratch paper) 5. Determine the value needed to reject the null hypothesis

Answer 1

Но, μ. 1.685 :302 Test &ta hgh@ е х-Н somnle nean 4- Ts 1-25- 6 8 302 /2 . 6682 hades go on여 4/s eg io

To reje c e-com re a 1.76 x 1.303 +--1.G8E) 2 キー):68S っ> x > 296194 or y<04080

The last two equations were found using TS>1.96 and TS<-1.96. (where TS=(Xbar-1.685)/(1.303/4^0.5))