A researcher was interested in the effects of alcohol on attractiveness of mate selected (referred to...

A researcher was interested in the effects of alcohol on attractiveness of mate selected (referred to as the beer goggle effect). She compared the rating (by independent raters) on level of attractiveness of the partners that young people chose at a party. She compared a group before using alcohol then after using alcohol. Assessment was whether their chosen partners differed in levels of attractiveness. Higher scores indicated more attractive partners. The attractiveness of partner for each participant (measured by independent raters) in 2 scenarios for the same group (before using alcohol and after using alcohol) was as follows:

Before using alcohol	After using alcohol
5	10
12	14
7	15
5	9
8	11
6	10
10	13
8	11
7	9

Test the hypothesis (Use alpha level of 0.05) using both manual and MS Excel calculations that there is no statistically significant difference between alcohol using and non-alcohol using group with regard to the level of attractiveness of the partners they chose by the end of the party. In your answer determine and interpret the strength of this relationship.

Expert Solution

Solution: Here the concept of paired t-test is used.

milcah answered 1 year ago

Question text A researcher is interested in whether the attractiveness of the instructor influences student attendance...

Question text A researcher is interested in whether the attractiveness of the instructor influences student attendance at the statistics lab. The independent variable is the attractiveness of the lab instructor (assuming three instructors are of the same gender and are equally competent). The dependent variable is the number of times a student attends statistics lab during one semester. There are three groups with data: Group 1(unattractive instructor): 20, 13, 9, 22, 21 Group 2: moderately attractive instructor: 24, 27, 25,...

A substance researcher wanted to test the effects of an educational intervention about alcohol use and...

A substance researcher wanted to test the effects of an educational intervention about alcohol use and sexual risk behavior on alcohol consumption among college women that drink. Six college women were randomly selected from the population of students at a local college. Prior to the education intervention, participants were asked to self-report their alcohol consumption (in number of drinks) over the past 30 days. The participants then attended weekly educational sessions over a period of 4 weeks. One month following...

A researcher is interested in the effects of a new weight loss supplement. Participants in this...

A researcher is interested in the effects of a new weight loss supplement. Participants in this double-blind study are randomly assigned to either a group that receives the new supplement or a group that receives a placebo. Participants are weighed before starting the program. After 6 weeks of taking either the new supplement or the placebo, participants return to the lab to be weighed. Provide the appropriate null and alternative hypotheses. Determine which type of analysis would be appropriate to...

A researcher is interested in how income of a parent effects the income of their children....

A researcher is interested in how income of a parent effects the income of their children. They gather data from surveys about household income and they find that from a small sample the following data is true. The left column is the monthly income of person in the thousands and the right is their parent’s average monthly income between the two parents. Children’s income Parent’s income average 7 4 7 4 10 3 12 2 6 3 9 1 11...

A researcher is interested in the effects of practice on accuracy in a signal detection task....

A researcher is interested in the effects of practice on accuracy in a signal detection task. Participants are tested with no practice, after 1 hour of practice, and after 2 hours of practice. Each person participates in all three conditions. The following data indicate how many signals were accurately detected by each participant at each level of practice. Amount of practice Participant No Practice 1 Hour 2 Hours 1 3 4 6 2 4 5 5 3 2 3...

A researcher was interested in utilities provided by city governments. The researcher randomly selected 20 counties...

A researcher was interested in utilities provided by city governments. The researcher randomly selected 20 counties from a list of all counties in the U.S. From each of these counties the researcher then contacted each city government (a total of 192) and found that 12 (6.25%) of them provided electricity to their residents. In this situation the sampling frame is Select one: a. the list of all counties in the U.S. b. the 316 cities. c. the 20 counties. d....

2) A researcher is interested in studying whether or not student athletes drink more alcohol than...

2) A researcher is interested in studying whether or not student athletes drink more alcohol than the college students in general. The average number of drinks per week a college student drinks is 6.94 drinks (SD = 3.4). What we conclude if we selected a sample of 40 student athletes and they drank an average of 8.25 drinks? What does the distribution of sample means for this scenario consist of? Explain your decision using the distribution of sample means in...

Consider an experiment to determine the effects of alcohol and marijuana on driving. Five randomly selected...

Consider an experiment to determine the effects of alcohol and marijuana on driving. Five randomly selected subjects were given alcohol to produce legal drunkenness and then are given a simulated driving test (10 a top score; 0 a bottom score). Five different randomly selected subjects are given marijuana and the same driving test. Finally, a control group of five subjects is tested for driving while sober. Mean St. Deviation Alcohol 2.4 1.3 Drugs 3.6 1.8 Control 6.8 ...

A researcher is interested in studying the effects of out-of-wedlock childbearing on the subsequent earnings of...

A researcher is interested in studying the effects of out-of-wedlock childbearing on the subsequent earnings of young women. Her sample consists of unmarried women who have had no more than one successful pregnancy (i.e. one kid or one batch of twins). Her dependent variable is annual earnings while her independent variable of interest is each woman’s number of children. She plans to include measures of ethnicity, educational attainment, and local economic factors in her regression equation. There are likely to...

A researcher was interested in the effects of anomie-normlessness or breakdown of rules in a social setting

Research Situation A A researcher was interested in the effects of anomie-normlessness or breakdown of rules in a social setting. She obtained the following suicide rates (the number of suicides per 100,000 population) for five high-anomie, five moderate-anomie, and five low-anomie cities: what is the researchquestion?what is the hypothesis (Null and research statements)what are the two variables and there level of measurments?

Question