1. In 2011, the Institute of Medicine (IOM), a non-profit group affiliated with the US National...

1. In 2011, the Institute of Medicine (IOM), a non-profit group affiliated with the US National Academy of Sciences, reviewed a study measuring bone quality and levels of vitamin-D in a random sample from bodies of 675 people who died in good health. 8.5% of the 82 bodies with low vitamin-D levels (below 50 nmol/L) had weak bones. Comparatively, 1% of the 593 bodies with regular vitamin-D levels had weak bones.

Medical researchers are conducting a double-blind experiment treating high blood pressure patients with a new vitamin supplement. The researchers are conducting a hypothesis test in which a Type I error is very serious, and the Type II error is not very serious. Which level of significance is the best choice?

A. ? = 0.01

B. ? = 0.05

C. ? = 0.10

2. In 2013, psychology researchers conducted an experiment featuring 40 undergraduate college students, each of whom took a 20-question general-knowledge test on a computer. Participants were given four possible answers and instructed to pick the correct one. Before doing so, half the students were told that just before each question was asked, the correct answer was momentarily flashed onto the screen. They were informed that this happened too quickly for them to process the information consciously, but assured that it would register in their brains. This was the placebo treatment. In the control treatment participants were not told this.

The researchers write that: “Participants in the placebo condition who believed they had been exposed to the correct answers subliminally scored higher than participants in the control condition.”

The researchers conducted a hypothesis test to determine if the proportion of correct answers is significantly different for participants in the placebo condition and participants in the control condition (placebo proportion minus control proportion). The P-value is 0.02. What can the researchers conclude?

A.Researchers reject the null hypothesis. The proportion of correct answers for participants in the placebo condition is no different than the proportion of correct answers for participants in the control group.

B.Researchers reject the null hypothesis. The proportion of correct answers is significantly different for the placebo condition and the control group.

C.Researchers reject the null hypothesis. The proportion of correct answers for participants in the placebo condition is significantly higher than the proportion of correct answers for participants in the control group.

D.Researchers fail to reject the null hypothesis. The proportion of correct answers is different, but not significantly different.

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

According to the Institute of Medicine (IOM), which level of government as the central force in...

According to the Institute of Medicine (IOM), which level of government as the central force in public health, bears primary public sector responsibility for the health of the people? Why?

5. In a 2011 National Institute on Alcohol Abuse and Alcoholism survey, 33% of American adults...

5. In a 2011 National Institute on Alcohol Abuse and Alcoholism survey, 33% of American adults said that they had never consumed alcohol. Suppose that this result is true for the 2011 population of American adults. In a recent random sample of 2300 adult Americans, 35% said that they had never consumed alcohol. Test the hypothesis that the current percentage of American adults who have never consumed alcohol is different from 33%. What is your conclusion if the significance level...

Problem 1 Brooklyn Family Medicine, a for-profit group practice, has decided to acquire a new top-of-the-line...

Problem 1 Brooklyn Family Medicine, a for-profit group practice, has decided to acquire a new top-of-the-line electrocardiogram (ECG) machine. One alternative would be to purchase the equipment outright for $60,400. If purchased, the practice could borrow the amount needed from a local bank at a 6 percent interest rate. Also, if purchased, the practice would have to sign a maintenance contract with a vendor that would cost $1,600 annually, payable at the beginning of each year. Alternatively, the practice could lease...

The Gulf Sea Turtle Conservation Group (GSTCG), a non–profit group of volunteers working to collect data...

The Gulf Sea Turtle Conservation Group (GSTCG), a non–profit group of volunteers working to collect data on nesting sea turtles and to promote sea turtle conservation, is considering creating a video to educate people about sea turtle conservation. The cost of duplicating a video on a DVD and mailing the DVD is $5.56. In a GSTCG member meeting, the video plan was discussed. The first two columns of Table 1 below shows the expected demand for the DVD at different...

1. According to the U.S. Department of Education. Institute of Education Sciences, National Center for Education...

1. According to the U.S. Department of Education. Institute of Education Sciences, National Center for Education Statistics 1,026,000 high school seniors (rounded to the nearest thousand) took the ACT test as part of the college admissions process. The mean composite score was 21.1 with a standard deviation of 4.8. The ACT composite score ranges from 1 to 36, with higher scores indicating greater achievement in high school. According to the central limit theorem, what are the mean and standard error...

1. Why are all addiction counseling useful? (100 words at least.) 2. Why is National institute...

1. Why are all addiction counseling useful? (100 words at least.) 2. Why is National institute on drug Abuse is an effective assessment for counseling? (100 words at least)

Question 1 1 pts According to the National Bureau of Economic Research, the US slipped into...

Question 1 1 pts According to the National Bureau of Economic Research, the US slipped into a recession earlier this year. Group of answer choices True False Flag this Question Question 2 1 pts Throughout history money Group of answer choices None are correct has always been "backed" by a commodity has always been paper currency or precious metals has always been farm animals has been virtually anything that is accepted as a means of payment for stuff Flag this...

1. Kolyesna Hotels Group acquired some financial data for the years 2010 and 2011 Financial Data...

1. Kolyesna Hotels Group acquired some financial data for the years 2010 and 2011 Financial Data 2010 2011 Net Income $118,000 $149,000 Total Revenue $1,910,000 $2,070,000 Total Assets $3,789,000 $4,612,000 Total Owner's Equity $910,000 $1,010,000 Preferred Dividends Value $10,000 $11,500 Common Shares Outstanding 42,000 57,000 Market Price per Share $44.10 $50.82 Using the financial data table, calculate the required ratios for the Kolyesna Hotel Group in 2011 (assume there are 365 days in a year). a) Profit margin ratio b)...

1. When economists say that a good is non-rival in consumption, they mean that: Group of...

1. When economists say that a good is non-rival in consumption, they mean that: Group of answer choices no one wants the good. everyone wants the good. the good is widely available. more than one person can enjoy the good at the same time. 2. Private goods are: Group of answer choices rival in consumption and their benefits are nonexcludable. nonrival in consumption and their benefits are excludable. nonrival in consumption and their benefits are nonexcludable. rival in consumption and...

1. You are the financial officer of a non-profit organization that is negotiating a five-year loan...

1. You are the financial officer of a non-profit organization that is negotiating a five-year loan with a local bank to purchase a small warehouse. The loan will be for $100,000 at a 6% interest repaid in five annual installments. a. What annual payment will you have to make on the loan each year? b. Assume your answer to part a above is $24,500. The bank will charge a loan origination fee of $3,000 dollar that must be paid at...

Subjects