# statistics

A researcher is testing the hypothesis that consuming a sports drink during exercise improves endurance. A sample of n=50 male college students is obtained and each student is given a series of three endurance tasks and asked to consume 4 ounces of the drink during each break between tasks. The overall endurance score for this sample is M=53. For the general population, without any sports drink, the scores for this task average m=50 with a standard deviation of σ=12.
a. Can the researcher conclude that endurance scores with the sports drink are significantly higher than scores without the drink? Use a one- tailed test with α=.05.
b. Can the researcher conclude that endurance scores with the sports drink are significantly different than scores without the drink? Use a two- tailed test with α=.05.
c. You should find that the two tests lead to different conclusions. Explain why.

1. 👍 0
2. 👎 0
3. 👁 561
1. Briefly explain how increasing sample size influences each of the following. Assume that all other factors are held constant.
a. The size of the z- score in a hypothesis test.
b. The size of Cohen’s d.
c. The power of a hypothesis test.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### English

1. I am into sports. (What is the meaning of this sentence?) 2. Exercise is good for the health. 2-1. Exercise is good for health. 2-2. Exercise is good for your health. 2-3. Exercise does good for people. (Are all correct?) 3.

2. ### literature

"Regular aerobic exercise gives an individual more endurance" is a sentence that shows cause and effect. Which word indicates the cause? A. Regular B. Endurance C. Exercise D. Individual

3. ### Fractions

To make a sports drink for the football team, Jaylen filled 9/10 of a large cooler with water. Then, he filled the remaining space with 6 cups of sports drink concentrate. How many gallons of sports drink did JAylen make? 1 gallon

4. ### statistics

A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small meal. After eating the meal, their hearing was tested. The

1. ### Psychology

For these hypothesis, I need to know... Determine what research goal is required determine whether you can use the experimental method decide how you would define your variables(using operational definitions) (1) A pregnant

2. ### Health (Ms. Sue)

1. Choose one component of your physical fitness that you would like to improve. A: I would like to improve my cardiorespiratory endurance. 2. What exercise would be a good indicator of your fitness in this area? A: Being able to

3. ### statistics

Directional and nondirectional hypotheses can be easily interchanged according to the hypothesis the researcher is testing. For instance, a drug company might predict that a drug will help a subject lose weight while another drug

4. ### PSY315

Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should

1. ### Psychological Statistics

A researcher predicts that watching a film on institutionalization will change students’ attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives

2. ### statistics

Formulate a hypothesis statement and perform the five-step hypothesis testing procedure

3. ### IMPORTANT!!!! Psychology

For these hypothesis, I need to know... Determine what research goal is required determine whether you can use the experimental method decide how you would define your variables(using operational definitions) (1) A pregnant

4. ### psychology

dr. gibson has created a new energy drink which he hopes will also make a person smarter when testing his new drink what is the independent variable and what is the dependent variable?