The Canadian Federation of Independent Business (CFIB) sent an online survey to 3000 small businesses in Canada asking many questions as to how they were affected by the Covid-19 sanitary restrictions over the last two years. Of the 229 businesses that responded to the CFIB survey, 37.1 % reported that they were negatively affected. An equivalent provincial association in Quebec (AGAP) had just conducted a similar survey among its 250 members. Among the 24 AGAP
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The Canadian Federation of Independent Business (CFIB) sent an online survey to 3000 small businesses in Canada asking many questions as to how they were affected by the Covid-19 sanitary restrictions over the last two years. Of the 229 businesses that responded to the CFIB survey, 37.1 % reported that they were negatively affected. An equivalent provincial association in Quebec (AGAP) had just conducted a similar survey among its 250 members. Among the 24 AGAP members who responded to the same question, 7 of them said they were negatively affected.
Do you have any reason to doubt that, statistically, the AGAP respondents can be considered part of the same population of CFIB respondents? Provide a statistical argument using a cut-off point (red flag) of 5%.
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- Researchers at RTI International, an organization dedicated to healthcare research, designed a study to compare how many insured Americans are going to urgent care clinics versus the emergency room for COVID-19 testing based on health insurance status. They think people with private health insurance (e.g. Blue Cross Blue Shield) will be more likely to go to urgent care clinics compared than those with public health insurance (e.g. Medicaid) who would be more likely to go to the emergency room for COVID-19 testing. They plan to take a random sample of urgent care clinics and emergency rooms in Massachusetts to test their hypotheses. Researchers at RTI International, an organization dedicated to healthcare research, designed a study to compare how many insured Americans are going to urgent care clinics versus the emergency room for COVID-19 testing based on health insurance status. They think people with private health insurance (e.g. Blue Cross Blue Shield) will be more likely to go…Researchers at RTI International, an organization dedicated to healthcare research, designed a study to compare how many insured Americans are going to urgent care clinics versus the emergency room for COVID-19 testing based on health insurance status. They think people with private health insurance (e.g. Blue Cross Blue Shield) will be more likely to go to urgent care clinics compared than those with public health insurance (e.g. Medicaid) who would be more likely to go to the emergency room for COVID-19 testing. They plan to take a random sample of urgent care clinics and emergency rooms in Massachusetts to test their hypotheses. What is the independent variable? What is the dependent variable? What are the hypotheses?Of the people in Canada, 44% have received two doses of Covid-19 vaccine, 38% have received onedose of Covid-19 vaccine, and the remainder have not received any dose of Covid-19 vaccine. Notethat the level of risk for Covid-19 infection are high and low risks. Of those who have received twodoses of Covid-19 vaccine, 8% are at high risk for Covid-19 infection, whereas 20% of those who havereceived one dose of Covid-19 vaccine and 60% of those who have not received any dose of Covid-19vaccine are at high risk for Covid-19 infection. Suppose that we randomly select one person inCanada. What is the probability that the persona) is at low risk for Covid-19 infection, given that person has received two doses of Covid-19 vaccine?b) is at low risk for Covid-19 infection?c) do not receive any dose of Covid-19 vaccine, given that that person is at low risk for Covid-19infection
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- A consulting firm that surveyed consumers’ holiday shopping behavior found that the percentage of consumers from the US, Canada, and China who said that they planned to spend more on holiday shopping were 40%, 34% and 73%, respectively The survey also found that the percentage of consumers from the US, Canada, and China who said that they were willing to share personal information with retailers in order to receive personalized offers from retailers were 55%, 46% and 72%, respectively Assume that there are equal portions of consumers being surveyed from each of the three countries, the survey results are good representations of the three populations of consumers, and whether a consumer plans to spend more on holiday shopping is statistically independent of whether he/she is willing to share personal information with retailers in order to receive personalized offers from retailers If you randomly select a consumer from the US, what is the probability that the consumer plans to…The University is considering changing the email system that they currently use. Since there are substantial learning costs associated with any new software, the University only wants to change to the new system if it is very confident that there is at least a 20% difference in the proportion of faculty and staff who say they like the new system. In a sample of 120 users of the current system, the University finds that 65 say they like the current system. In another sample of 90 experimental users of the “new” system, the University finds that 70 of them like the new system. When testing the hypothesis (using a 5% level of significance) that there is at least a 20% difference in the proportion of users who like the two systems, the p-value is .2943; what is your conclusion concerning the null hypothesis? Reject the null hypothesis Fail to reject the null hypothesisDue to COVID19, airlines cut services, such as meals and snacks during flights, and started charging for luggage. However, they are still concerned about service. A group of four carriers hired Denny's Marketing Research Inc. to survey passengers regarding their level of satisfaction with a recent flight. The survey included questions on ticketing, boarding, in-flight service, baggage handling, pilot communication, and so forth. Twenty-five questions offered a range of possible answers: excellent, good, fair, or poor. A response of excellent was given a score of 4, good a 3, fair a 2, and poor a 1. These responses were then totaled, so the total score was an indication of the satisfaction with the flight. The greater the score, the higher the level of satisfaction with the service. The highest possible score was 100. Denny randomly selected and surveyed passengers from the four airlines. Below is the sample information. Is there a difference in the mean satisfaction level among the…
- The Ministry of Health and Social Services (MoHSS) in Namibia intends to embark upon a COVID19 vaccination campaign in the Country. But before deciding which type of COVID19 vaccine to be ordered from the Manufacturers, they first carried out a survey on some countries around the world in order to establish the most preferred vaccine. The findings revealed that: Sixty-eight (68) of them prefer the Pfizer; fifty-two (52) prefer the Moderna; and forty-eight (48) prefer the AstraZeneca. Thirty-six (36) of them prefer Pfizer and AstraZeneca; twenty-two (22) of them prefer Moderna and AstraZeneca; 24 prefer Modernaonly; 26 prefer Pfizer only; and the remaining 90 countries preferred none of the vaccines.a) Draw the Venn Diagram depicting all the information.The University is considering changing the email system that they currently use. Since there are substantial learning costs associated with any new software, the University only wants to change to the new system if it is very confident that there is at least a 20% difference in the proportion of faculty and staff who say they like the new system. In a sample of 140 users of the current system, the University finds that 75 say they like the current system. In another sample of 85 experimental users of the “new” system, the University finds that 72 of them like the new system. When testing the hypothesis (using a 5% level of significance) that there is at least a 20% difference in the proportion of users who like the two systems, what is the null and alternative hypothesis?Based on a survey of 12,344 U.S. college students and 6,729 Canadian college students, Kuo, Adlaf, Lee, Gliksman, Demers, and Wechsler (2002) report that alcohol use is more common among Canadian than U.S. students, but heavy drinking (five or more drinks in a row for males, four or more for females) is significantly higher among U.S. students than Canadian students. Is this an example of a survey research design?