Concept explainers
The marketing research firm of OUWant12 designed and sent three spam advertisements to 40 e-mail accounts. The first one was an ad for hair removal cream, the second was an ad for Botox treatments, and the third was an ad for a new all lima bean diet. Explain why, when the following results occurred, the sponsors discontinued their services.
23 recipients deleted the ad for hair removal cream without looking at it.
18 recipients deleted the ad for Botox treatments.
19 recipients deleted the ad for the all lima bean diet.
12 recipients deleted the ads for hair removal cream and Botox treatments.
6 recipients deleted the ads for Botox treatments and the all lima bean diet.
7 recipients deleted the ads for the hair removal cream and the all lima bean diet.
2 recipients deleted all three ads.
Want to see the full answer?
Check out a sample textbook solutionChapter 2 Solutions
Math in Our World
Additional Math Textbook Solutions
Mathematics for the Trades: A Guided Approach (10th Edition) - Standalone book
Mathematics for the Trades: A Guided Approach (11th Edition) (What's New in Trade Math)
Pathways to Math Literacy (Loose Leaf)
Mathematics All Around (6th Edition)
Basic College Mathematics (12th Edition)
- The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What is the probability of Z OBT being more than alphs? (round to the nearest hundredth)arrow_forwardThe rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What are the hypotheses? A Null: p=0.95 Alternate: p=0.95 B Null: p=0.95 Alternate: p<0.95 C Null: p=0.95 Alternate: p>0.95 D Null: p=0.55 Alternate: p =/ 0.95arrow_forwardA professional marketing survey involves product recognition in New York and California. Of 558 New York residents surveyed, 193 knew the product while 179 out of 614 Californians knew the product. Test the claim that the recognition rates are greater in New York. In which state does the product need the most help with name recognition?arrow_forward
- The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the receiving end of a bite, the vaccine can protect them from a dangerous and potentially fatal illness. Furthermore, in most places, the rabies vaccine for dogs is legally required. The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have been vaccinated with their rabies vaccine. 158,045 of the 165,000 dogs examined had their rabies shots. Risk no more than 5% Type I error. What is the zcrit?arrow_forwardAn addictions researcher wants to see if male and female alcoholics differ in the type of alcohol they consume. She goes to a large alcohol detox facility, gets a sample of men and a sample of women, and checks each person's chart to find the beverage of choice. She classifies the beverages as (a) wine, (b) beer, or (c) hard liquor. She then figures out how many people of this sample of 66 people fall into each category. What type of test should she perform? Answer Choices: 2-way ANOVA chi-square test of independence correlation chi-square goodness of fit Imagine an elementary school teacher who is a follower of Carl Rogers and believes that unconditional positive regard leads to psychological health and positive behaviors. He obtains a random sample of 40 children from other teachers' classrooms at his school and, through home observation, he categorizes each child as receiving unconditional positive regard frequently, sometimes, or rarely. He then has each…arrow_forwardA small ice cream parlor has had great success over the past several years and is interested in expanding into handmade chocolate candies. A poll of 56 randomly selected customers was asked if they would purchase these chocolate candies. Forty of the customers indicated that they would.arrow_forward
- A recent study examined the drinking behaviors of undergraduate college students (male and female freshmen). Each participant was asked how many alcoholic beverages they consumed during the past 7 days. The researchers wish to determine if there is a difference in the drinking habits of males and females in this age group. A recent study examined the drinking behaviors of undergraduate college students (male and female freshmen). Each participant was asked how many alcoholic beverages they consumed during the past 7 days. The researchers wish to determine if there is a difference in the drinking habits of male and females in this age group. Female Male 9 13 5 9 5 7 9 11 8 10 3 5 5 6 2…arrow_forwardA report described teens' attitudes about traditional media, such as TV, movies, and newspapers. In a representative sample of American teenage girls, 42% said newspapers were boring. In a representative sample of American teenage boys, 45% said newspapers were boring. Sample sizes were not given in the report. A button hyperlink to the SALT program that reads: Use SALT. (a) Suppose that the percentages reported had been based on a sample of 50 girls and 40 boys. Is there convincing evidence that the proportion of those who think that newspapers are boring is different for teenage girls and boys? Carry out a hypothesis test using ? = 0.05. (Use pgirls − pboys.) Find the test statistic. (Round your answer to two decimal places.) z = Find the P-value. (Round your answer to four decimal places.) P-value = State your conclusion. Reject H0. We do not have convincing evidence that the proportion of girls who say that newspapers are boring is different from the proportion of boys who…arrow_forwardKentville, a community of 10,000 people, resides next to a krypton mine, and there is a concern that the emission from the krypton smelter have resulted in adverse effects. Specifically, Kryptonosis seems to have killed 12 of Kentville’s inhabitants last year. A neighboring community, Lanesburg, has 25,000 inhabitants and is far enough from the smelter to not be affected by the emission. In Lanesburg, only three people last year died of Kryptonosis. Given that the number of deaths in Kentville and their causes last year were: Heart attack=7 Accidents=4 Kryptonosis=12 Other=6 What is the risk of dying of Kryptonosis in Kentville relative to non-contaminated locality?What is the risk of dying of Kryptonosis in Kentville relative to deaths due to other causes? How many times the chance of dying of Kryptonosis compared to dying of accidents ? How many times the chance of dying of Kryptonosis compared to Other causes?arrow_forward
- A real estate major collected information on some recent local home sales. The first 6 lines of the database appear in the accompanying table. The columns correspond to the house identification number, the community name, the zip code, the number of acres of the property, the year the house was built, the market value, and the size of the living area (in square feet). Do the data appear to have come from a designed survey or experiment? What concerns might you have about drawing conclusions from this data set? E Click the icon to view the data table. Do the data appear to have come from a designed survey or experiment? O A. It is not clear if the data were obtained from an experiment. They are certainly not from a survey. O B. It is not clear if the data were obtained from a survey. They are certainly not from an experiment. O C. It is not clear if the data were obtained from a survey or an experiment. O D. The data were certainly not obtained from survey or an experiment. What…arrow_forwardA certain health maintenance organization (HMO) wishes to study why patients leave the HMO. A SRS of 360 patients was taken. Data was collected on whether a patient had filed a complaint and, if so, whether the complaint was medical or nonmedical in nature. After a year, a tally from these patients was collected to count number who left the HMO voluntarily. Here are the data on the total number in each group and the number who voluntarily left the HMO: No complaint Medical complaint Nonmedical complaint Total 159 132 69 Left 60 34 26 If the null hypothesis is H0:p1=p2=p3 and using α=0.01, then do the following: (a) Find the expected number of people with no complaint who leave the HMO: (b) Find the expected number of people with a medical complaint who leave the HMO: (c) Find the expected number of people with a nonmedical complaint who leave the HMO: (d) Find the test statistic: (e) Find the degrees of freedom: (f) Find the critical value:arrow_forwardAn entrepreneur owns 20 corporations, each with more than $10 million in assets. The entrepreneur consults the U. S. Internal Revenue Data Book and discovers that the IRS audits 20% of businesses of that size. On average how many of this entrepreneur's corporations do you expect will be audited. You can assume that all 20 corporations are independent. You do not need any knowledge about the IRS. Use probably and statistics.arrow_forward
- Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL