a company is criticized because only 18 of 50 executive at a local branch are women....
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a company is criticized because only 18 of 50 executive at a
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A sample of employees in a company with executives and non-executives are asked whether they are...
A sample of employees in a company with executives and non-executives are asked whether they are satisfied with their present salary. TABLE A gives the summary of results: TABLE A Employees Sample Size Proportion of employees satisfied with present salary 18 50 Executives Non- executives 50 14 i. Test the hypothesis that the percentage of employees who are satisfied with their salaries is higher for executives compared to non-executives at 5% significance level. Determine the p-value for the test and...
12-18. To investigate whether online automobile insurance he cheaper than the policies the offer, a local...
12-18. To investigate whether online automobile insurance he cheaper than the policies the offer, a local insurance agent compared the mobile insurance cmiums for five of this customers with price quotations for the same coverage from o n e panies. Results are shown in table. Test the null hypothesis that the mean of the difference all t h e policies is zero versus the relevant alternative, as indicated below Us 01 Asume a normal distribuce of differences. (dependent) Policy Local...
A company is willing to renew its advertising contract with a local radio station only if...
A company is willing to renew its advertising contract with a local radio station only if the station can prove that more than 26% of the residents of the city have heard the ad and recognize the company's product. The radio station conducts a random phone survey of 500 people. The survey shows that 91 people have heard the ad and recognize the company's product. For this test, the radio station uses a 5% significance level and will reject the...
2. The CEO of a software company is committed to expanding the proportion of highly qualified...
2. The CEO of a software company is committed to expanding the proportion of highly qualified women in the organization’s staff of salespersons. He believes that the proportion of women in similar sales positions across the country in 2004 is less than 45%. Hoping to find support for his belief, he directs his assistant to collect a random sample of salespersons employed by his company, which is thought to be representative of sales staffs of competing organizations in the industry....
An insurance company selected samples of clients under 18 years of age and over 18 and...
An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. The results are shown below. Under Age of 18 Over Age of 18 n1 = 400 n2 = 500 Number of accidents = 190 Number of accidents = 150 Do people under the age of 18 get into significantly more accidents? Use a = 1%. "While I hope you have an appropriate null...
Suppose that Vera wants to test the hypothesis that women make less money than men doing...
Suppose that Vera wants to test the hypothesis that women make less money than men doing the same job. According to the Bureau of Labor Statistics (BLS), the median weekly earnings for men in the sales and office occupation sector in 2015 was $704. Vera collected median weekly earnings data for women in 2015 from a random subset of 18 positions in the sales and office occupation sector. The following is the sample data. S627, 5617, S732, S735, $639, S569,...
17)An analyst at a local bank wonders if the age distribution of customers coming for service...
17)An analyst at a local bank wonders if the age distribution of
customers coming for service at his branch in town is the same as
at the branch located near the mall. He selects 100 transactions at
random from each branch and researches the age information for the
associated customer. Here are the data:
17) An analyst at a local bank wonders if the age distribution of customers coming for service at his branch in town is the same as...
A certain financial services company uses surveys of adults age 18 and older to determine if...
A certain financial services company uses surveys of adults age 18 and older to determine if personal financial fitness is changing over time. Suppose that in February 2012, a sample of 1,000 adults showed 410 indicating that their financial security was more than fair. In February 2010, a sample of 800 adults showed 280 indicating that their financial security was more than fair. (a) State the hypotheses that can be used to test for a significant difference between the population...
A company hopes to improve customer satisfaction, setting as a goal no more than 10% negative...
A company hopes to improve customer satisfaction, setting as a goal no more than 10% negative comments. A random survey of 360 customers found only 14 with complaints. a) Create a two-sided 95% confidence interval for the true level of dissatisfaction among customers. b) Does this provide evidence that the company has reached its goal? Using your confidence interval, test an appropriate hypothesis and state your conclusion. a) The 95% confidence interval for the true level of dissatisfaction among customers...
Summary statistics for 10 drivers' car insurance premiums quoted by a local agent and an online...
Summary statistics for 10 drivers' car insurance premiums quoted by a local agent and an online company are shown in the table to the right. The accompanying table has displays for each company's quotes and for the difference left parenthesis Local minus Online right parenthesis . Variable Count Mean StdDev Local 10 802.8 220.587 Online 10 754.8 284.838 PriceDiff 10 48.0 155.531 Test an appropriate hypothesis to see if there is evidence that drivers might save money by switching to...
A sample of employees in a company with executives and non-executives are asked whether they are satisfied with their present salary. TABLE A gives the summary of results: TABLE A Employees Sample Size Proportion of employees satisfied with present salary 18 50 Executives Non- executives 50 14 i. Test the hypothesis that the percentage of employees who are satisfied with their salaries is higher for executives compared to non-executives at 5% significance level. Determine the p-value for the test and...
12-18. To investigate whether online automobile insurance he cheaper than the policies the offer, a local insurance agent compared the mobile insurance cmiums for five of this customers with price quotations for the same coverage from o n e panies. Results are shown in table. Test the null hypothesis that the mean of the difference all t h e policies is zero versus the relevant alternative, as indicated below Us 01 Asume a normal distribuce of differences. (dependent) Policy Local...
A company is willing to renew its advertising contract with a local radio station only if the station can prove that more than 26% of the residents of the city have heard the ad and recognize the company's product. The radio station conducts a random phone survey of 500 people. The survey shows that 91 people have heard the ad and recognize the company's product. For this test, the radio station uses a 5% significance level and will reject the...
An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. The results are shown below. Under Age of 18 Over Age of 18 n1 = 400 n2 = 500 Number of accidents = 190 Number of accidents = 150 Do people under the age of 18 get into significantly more accidents? Use a = 1%. "While I hope you have an appropriate null...
Suppose that Vera wants to test the hypothesis that women make less money than men doing the same job. According to the Bureau of Labor Statistics (BLS), the median weekly earnings for men in the sales and office occupation sector in 2015 was $704. Vera collected median weekly earnings data for women in 2015 from a random subset of 18 positions in the sales and office occupation sector. The following is the sample data. S627, 5617, S732, S735, $639, S569,...
17)An analyst at a local bank wonders if the age distribution of
customers coming for service at his branch in town is the same as
at the branch located near the mall. He selects 100 transactions at
random from each branch and researches the age information for the
associated customer. Here are the data:
17) An analyst at a local bank wonders if the age distribution of customers coming for service at his branch in town is the same as...
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