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A sample of 250 adults tried the new multigrain cereal "Wow!" A total of 187 rated it as excellent. In a sample of 100 children, 66 rated it as excellent. Using the 0.1 significance level, the researcher wishes to show that adults like the cereal better than children. What is the pooled proportion?

.723

1.408

.494

.807

A company is researching the effectiveness of a new website design to decrease the time to access a website. Five website users were randomly selected, and their times (in seconds) to access the website with the old and new designs were recorded. To compare the times, they computed (new website design time - old website design time). The results follow.

user Old web design           New web design
A                     30                                 25
B                      45                                30
C                      25                                20

D 32 30

E 28 27
What is the value of the test statistic?

2.256

1.895

3.747

2.447

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