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File Edit View Favortes Tools Help Search 62 Oakland, CA - google.com . Ask com Se- € Chamberlain College of N.. Tameka Robert Homework: Week 7 Homework 40 pts Overview Ex. Scores 0 of 2 pts HW Score: 62.77% (25.11 of 40 pts) 19 of 20 complete a) write the claim mathematically and identify Ho and H, (b) Find the crical value(s) and identify the rejection region(S). (e) Find the standardized test statistic (4) Decide whether to : 11 An envronmental agency recently claimed more than 30% ofconsumers have st reject or fail to reject the null hypothesis. opped b y gaertan pro because of en r al concerns ham n mpetito consumers, you find 35% have stopped buying the product. At -001, do you have enough evidence to support the clam? h View an Example )Whsich of the following correcty states Ho and H,2 Animation Textboolk H p0.30 OB Ho p>0 30 H, pS0.30 OE Ho pc0.30 H, p20.30 Ho ps030 H p 0.30 H0: p=0.30 H, p 0.30 or gp Tech Help 2- Ask My Instructor Print (b) What is (are) the critical value(s) z0? Use a comma to separate answers as needed. Round to two decimal places as needed) Enter your answer in the answer box, then click Check Answer. Save 3 parts remaining

Explanation / Answer

a)

Formulating the null and alternatuve hypotheses,          
          
Ho:   p   <=   0.3
Ha:   p   >   0.3 [ANSWER]

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b)

As this is a right tailed z test, then at 0.01 level,

zo = 2.33 [ANSWER]

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c)
As we see, the hypothesized po =   0.3      
Getting the point estimate of p, p^,          
          
p^ = x / n =    0.35      
          
Getting the standard error of p^, sp,          
          
sp = sqrt[po (1 - po)/n] =    0.014209964      
          
Getting the z statistic,          
          
z = (p^ - po)/sp =    3.518657753   [ANSWER]

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D)  
          
As z > 2.33, we   REJECT THE NULL HYPOTHESIS.      

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