for #11 can you figure out z stat with using 1-propZTest on ti-84 i think you ca

Question

for #11 can you figure out z stat with using 1-propZTest on ti-84 i think you can get proportion by dividing the x by n which gets you .12 the z stat when i use the 1 propZtest i get a z stat of 0 os that correct?

is believed to be 22% Company offidals war successful than the typical ad (Ge. if there of "like the ads a lot" fo s are less 0) Referring to Scenario is evidence that the ompany's ads is less than 0.22) at a 0.01 level of significance. A) greater than 2.3263. C) greater than -2.3263. 9-7, the null hypothesis will be rejected if the test statistic is SCENARIO 9-8 B) less than -2.3263. D) less than 2.3263. 10) One of the biggest issues facing e- retailers is the th The website at the company of browsers ws the ability to turn browsers into buyers. This is measured by the conversion rate, tun n buy something in their visit to a site. The conversion rate for a company's website was y was redesigned in an attempt to increase its conversion rates. A samples of 200 browsers a is evid ence of an increase in conversion rate at the 5% level of significance. cted. Su ppose that 24 browsers made a purchase. The company officials would like to know if there 10.1%. the 11) Referring to Scenario 9-8, the null hypothesis will be reje A) greater than-1.645 C) less than -1.645. cted if the test statistic is B) greater than 1.645. D) less than 1.645. 12) If we are testing for the diference between the means of 2 independent populations presuming equal variances with samples of mi-20 and n2 = 20, the number of degrees of freedom is equal to A) 38. B) 18. 12) C) 19. D) 39.

Explanation / Answer

11) As it is a right tailed test, so The null and will be rejected if the test statistic is greater than 1.645.

B) The degrees of freedom = n1 + n2 - 2

= 20 + 20 - 2 = 38

So Option-A is the correct answer.

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