Suppose burger king has run a major advertising

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Exam 3 Practice Test

16 )   Suppose Burger King has run a major advertising campaign in the hopes of increasing monthly sales . To investigate the effectiveness of this campaign , Burger King randomly selected six restaurants and recorded the monthly sales before and after the advertising . The following data represents these sales figures in thousands of dollars . 16 ) Restaurant 1 2 3 4 5 6 After $ 123 $ 122 $ 145 $ 156 $ 160 $ 134 Before $ 107 $ 110 $ 143 $ 168 $ 145 $ 125 If Population 1 is defined as sales after the advertising campaign and Population 2 is defined as sales before the advertising campaign , the standard deviation of the matched - pair differences is _ _______.
A ) 15.72
B ) 7.46
C ) 12.31
D ) 10.58
17 )   Two real estate companies , Century 21 and RE / MAX , compete with one another in a local market . The manager of the Century 21 office would like to advertise that homes listed with RE / MAX average more than 10 days on the market when compared to homes listed with his company . The following data shows the sample size and average number of days on the market for the two companies along with the population standard deviations . 17 ) Century 21 RE / MAX Sample mean 122 days 144 days Sample size 36 30 Population standard deviation 32 days 35 days If Population 1 is defined as RE / MAX and Population 2 is defined as Century 21 , the 80 % confidence interval for the difference in population means is ________.
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19 )   You have been assigned to test the hypothesis that the average number of hours per week that an American works is higher than the average number of hours per week that a Swede works . The following data summarizes the sample statistics for the number of hours worked per week for workers in each country . Assume that the population variances are unequal . 19 ) American Swede Sample mean 32.7 hours 28.2 hours Sample size 15 12 Sample standard deviation 5.1 hours 6.0 hours If Population 1 is defined as American workers and Population 2 is defined as Swedish workers , the degrees of freedom for this hypothesis test are ________.
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20 )   The Canadian government would like to test the hypothesis that the average hourly wage for men is more than $ 2.00 higher than the average hourly wage for women . The following data summarizes the sample statistics for hourly wages for men and women . 20 ) Men Women Sample mean $ 25.40 $ 21.20 Sample size 20 18 Sample standard deviation $ 6.20 $ 5.90 If Population 1 is defined as men and Population 2 is defined as women , the test statistic for this hypothesis test would be ________.
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21 )   The Canadian government would like to test the hypothesis that the average hourly wage for men is more than $ 2.00 higher than the average hourly wage for women . The following data summarizes the sample statistics for hourly wages for men and women . ( df = 35 ) . 21 ) Men Women Sample mean $ 25.40 $ 21.20 Sample size 20 18 Sample standard deviation $ 6.20 $ 5.90 If Population 1 is defined as men and Population 2 is defined as women , and using ΅ = 0.025 , the critical value for this hypothesis test would be ________.
A ) 1.306
B ) 1.688
C ) 2.028
D ) 1.296
22 )   A hypothesis is an assumption about a population parameter such as a mean or a proportion . 22 )
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23 )   A golfer claims that his average golf score at the course he plays regularly is less than 90 . A random sample of 35 rounds of golf was selected and the scores were recorded . Assume that the standard deviation for the population of scores for this golfer is 3.4 and the true population mean for scores for this golfer is 88.2 . Using ΅ = 0.05 , beta equals ________.
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24 )   The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 years . A random sample of 45 cars had an average age of 10.6 years . It is believed that the population standard deviation for the age of cars is 4.1 years . The Department of Transportation would like to set ΅ = 0.05 . The p - value for this hypothesis test would be ________.
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25 )   When the p -value is greater than alpha , the conclusion for the hypothesis test is to reject the null hypothesis .
A ) less than the critical value , we can conclude that the proportion of Marriott customers that carry two Wi - Fi devices is not more than 0.60
B ) less than the critical value , we can conclude that the proportion of Marriott customers that carry two Wi - Fi devices is greater than 0.60
C ) more than the critical value , we can conclude that the proportion of Marriott customers that carry two Wi - Fi devices is less than 0.60
D ) more than the critical value , we can conclude that the proportion of Marriott customers that carry two Wi - Fi devices is greater than 0.60
16) Suppose Burger King has run a major advertising campaign in the hopes of increasing monthly sales. To investigate the effectiveness of this campaign, Burger King randomly selected six restaurants and recorded the monthly sales before and after the advertising. The following data represents these sales figures in thousands of dollars. Restaurant 1 2 3 4 5 6 After $123 $122 $145 $156 $160 $134 Before $107 $110 $143 $168 $145 $125 If Population 1 is defined as sales after the advertising campaign and Population 2 is defined as sales before the advertising campaign, the standard deviation of the matched - pair differences is ________. 16) A) 15.72 B) 7.46 C) 12.31 D) 10.58
17) Two real estate companies, Century 21 and RE/MAX, compete with one another in a local market. The manager of the Century 21 office would like to advertise that homes listed with RE/MAX average more than 10 days on the market when compared to homes listed with his company. The following data shows the sample size and average number of days on the market for the two companies along with the population standard deviations. Century 21 RE/MAX Sample mean 122 days 144 days Sample size 36 30 Population standard deviation 32 days 35 days If Population 1 is defined as RE/MAX and Population 2 is defined as Century 21, the 80% confidence interval for the difference in population means is ________. 17)
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 18) When performing a hypothesis test comparing two population means, we need to assign Population 1 to the larger sample mean and Population 2 to the smaller sample mean. 18) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 19) You have been assigned to test the hypothesis that the average number of hours per week that an American works is higher than the average number of hours per week that a Swede works. The following data summarizes the sample statistics for the number of hours worked per week for workers in each country. Assume that the population variances are unequal. American Swede Sample mean 32.7 hours 28.2 hours Sample size 15 12 Sample standard deviation 5.1 hours 6.0 hours If Population 1 is defined as American workers and Population 2 is defined as Swedish workers, the degrees of freedom for this hypothesis test are ________. 19)
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20) The Canadian government would like to test the hypothesis that the average hourly wage for men is more than $2.00 higher than the average hourly wage for women. The following data summarizes the sample statistics for hourly wages for men and women. Men Women Sample mean $25.40 $21.20 Sample size 20 18 Sample standard deviation $6.20 $5.90 If Population 1 is defined as men and Population 2 is defined as women, the test statistic for this hypothesis test would be ________. 20)

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