> Moving to another question will save this response. klsjauestion 13 of 17 uest

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> Moving to another question will save this response. klsjauestion 13 of 17 uestion 13 10 points Save Answer Good website design can make web navigation easier. The article" The implications of visualization ablity and structure preview design for web information search tasks presents a comparison o item recognition between two designs A sample o 20 uses using a comen na se ma rape 353 trs de ·w has i of 9.56. A sample of 20 users using a new structured web design averaged 54 2 items identified, with a standard deviation of 10.09, Can we conclude that the mean number of items identified is greater with the conventional structured design? Assume equal population variances, define population average items identified by using new structured design as H1 a. This is a two sample hypothesis b. State null and alternative hypotheses. H c. Later you determine that tstat 6 0809, lower critical value-1.6860, and p-value -1. You draw a conclusion that null hypothesis t test problem. (fill n the blank by "pooled variance" or Welch's") 2 (fill in the blanks by fill in the blank by "should or "should not") be rejected, and assumption of mean number of items identified with conventional structured design is in the blank by true" or "not true"). fill Question 130f 17 A Moving to another question will save this response 12:51 AM 11/21/20117 ] @ e e+

Explanation / Answer

a) Pooled variance

b) H0: 1 2

H1: 1 < 2

c) t = 6.0809 > t critical

p > alpha

null should not be rejected

not true

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