1-A company ran an ad campaign to raise its brand awareness above 6%. After the campaign, the company surveyed 500 people; 36 were aware of -the brand name. What is the p-value of the test?

Question options:

0.1292

0.1492

0.8508

0.8708

2-

A TV executive wanted to determine if the percentage of people watching a certain show after running ads for it was significantly higher than 12%. The sample proportion from a survey was 15% and the Z score was 2.145291. What was the sample size?

Question options:

562

540

548

568

3-

In conducting a test to see if the percentage of people who regularly recycle has significantly increased from 12.4% from 2 years ago, the p-value was 0.0329. What is the value of the

Z score

?

Question options:

1.92

-1.92

1.84

-1.84

4-

A researcher wants to determine if the percentage of people who recycle newspapers is significantly different than 14.2%. In a survey of 900 people, 133 do. The p-value of the test is 61.7%.

Question options:

True

False

5-

Weekly average sales data at a retail store captured after an extensive marketing campaign is as follows:

$4,666

$6,700

$4,500

$5,550

$4,768

$4,950

$5,225

The average sales at this store before the marketing campaign was $6,000 per week. Does the sample data collected after the marketing campaign indicate that the new marketing campaign had indeed increased the weekly sales? Use a 5% significance level Question options:

The sample size (n=6) is too small to test this hypothesis

There is no strong evidence that the weekly average sales increased as a result of the marketing campaign as the the p-value is greater than the level of significance

The p-value is 0.0615, greater then the level of significance and therefore not evidence for increased sales

A larger sample size is needed to test this hypothesis

6- An addictions researcher wanted to determine if the average amount per week that people spend on lottery tickets has significantly changed from $9.42. In a survey of 750 people, the average was $10.52 with a standard deviation of $3.67. What is the value of the t score?

8.2084

7.6284

-7.6284

-8.2084

7- In conducting a test for one mean, a histogram is slightly skewed left but has just one mode. However, the t distribution is appropriate since the t test is robust to non-normality.

True

False

-8

Statistics Canada conducted a survey to assess the economic benefits of 2010 Winter Olympics on Vancouver. Of the 2500 random sample surveyed, 2250 of the respondents were optimistic about the economic benefits. Use a 99% confidence interval, estimate the proportion of all the respondents who were optimistic about the economic benefits. What is the interval value for the upper limit? Question options:

0.950

0.915

2.576

0.015

9-

A researcher wanted to estimate the percentage of people who read a certain newspaper. In a survey, the percentage of respondents who read the paper is 28.125%. When constructing a 95% confidence interval of the actual percentage of people who read the newspaper, the half-width is 0.110154255. What was the sample size? Question options:

64

81

49

100