Question

In: Statistics and Probability

1 A researcher wanted to know whether losing one night sleep can affect problem solving. A...

1

A researcher wanted to know whether losing one night sleep can affect problem solving. A sample of n = 25 college students was given a problem-solving task at noon on one day and again at noon on the following day. The students were not permitted any sleep between the two tests. For each student, the difference between the first and the second score was recorded: MD = 5 and standard deviation of the difference score was s = 10.

Do the data indicate a significant change in problem solving ability? Use a two-tailed test with α = .01.

The alternative hypothesis in words is

Group of answer choices

a.Problem solving ability improves after losing on night sleep

b. Problem solving ability is reduced after losing one night of sleep

c. There is no significant difference in problem solving ability between the two conditions: before and after losing one night of sleep

d. There is a significant difference in problem solving ability between the two conditions: before and after losing one night of sleep

1a)

The null hypothesis in symbols is

Group of answer choices

a.H0: µ1≠ µ2

b. H0: µ1> µ2

c. H0: µD= 0

d. H0: µD≠ 0

e. H0: µD> 0

f. H0: MD = 4.7

g. H0: MD ≠ 4.7

h. H0: µD≤ 0

1b) The critical t-values are

Group of answer choices

a. ±2.064

b. ±2.797

c. ±1.711

d. ±2.492

1c)The t-statistic is

1d)

Your decision is

Group of answer choices

a. Reject the null hypothesis and conclude that there is a significant difference in problem solving ability between the two conditions: before and after losing one night of sleep

b. Reject the null hypothesis and conclude that there is no significant difference in problem solving ability between the two conditions: before and after losing one night of sleep

c. Fail to reject the null hypothesis and conclude that there is no significant difference in problem solving ability between the two conditions: before and after losing one night of sleep

d. Fail to reject the null hypothesis and conclude that there is a significant difference in problem solving ability between the two conditions: before and after losing one night of sleep

1e)

Compute r2 to measure the size of the treatment effect.

r2 is

1f)

Report the results in APA. Include r2 as a measure of the effect size.

Solutions

Expert Solution

Hope this will help you . Thank you.

orchestra answered 1 year ago
Next > < Previous

Related Solutions

A researcher wanted to know whether losing one night sleep can affect problem solving. A sample...
A researcher wanted to know whether losing one night sleep can affect problem solving. A sample of n = 25 college students was given a problem-solving task at noon on one day and again at noon on the following day. The students were not permitted any sleep between the two tests. For each student, the difference between the first and the second score was recorded: MD = 4.7 and standard deviation of the difference score was s = 8. Do...
Question 1: A researcher wants to know whether supplements affect how long the undead can go...
Question 1: A researcher wants to know whether supplements affect how long the undead can go without requiring human blood. To investigate this, she took one sample of vampires and one sample of zombies. Half the vampires and half the zombies received a placebo, while the other half of vampires and zombies received a supplement. She then recorded how many days the vampires and zombies could go without feeding. The goal of the study was to investigate three different things:...
Dr. Kovaleski is interested in examining whether quantity of sleep impacts problem solving ability. To test...
Dr. Kovaleski is interested in examining whether quantity of sleep impacts problem solving ability. To test problem solving ability, the research team gave participants a puzzle and measured how long it took participants to solve the puzzle in minutes. A group of participants were instructed to sleep 5 hours and then solve the puzzle in the morning. Then the same participants were instructed to sleep 7 hours and then solve a different puzzle in the morning. Then, participants were asked...
Dr. Kovaleski is interested in examining whether quantity of sleep impacts problem solving ability. To test...
Dr. Kovaleski is interested in examining whether quantity of sleep impacts problem solving ability. To test problem solving ability, the research team gave participants a puzzle and measured how long it took participants to solve the puzzle in minutes. A group of participants were instructed to sleep 5 hours and then solve the puzzle in the morning. Then the same participants were instructed to sleep 7 hours and then solve a different puzzle in the morning. Then, participants were asked...
The National Sleep Foundation used a survey to determine whether hours of sleep per night are...
The National Sleep Foundation used a survey to determine whether hours of sleep per night are independent of age (Newsweek, January 19, 2004). A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age...
A researcher wants to know whether supplements affect how long vampires can go without requiring human...
A researcher wants to know whether supplements affect how long vampires can go without requiring human blood. She took one sample of vampires (n = 10). Half received a placebo first and the supplement second, while the other half received the sup- plement first and the placebo second. She then recorded how many days the vampires could go without consuming human blood for each condition. The goal of the study was to see whether there would be any difference between...
A researcher wanted to know whether people drive faster in sports cars or pick up trucks....
A researcher wanted to know whether people drive faster in sports cars or pick up trucks. He went out on the freeway with a radar gun and track the speed of people in both types of cars. A sample of n=30 sport car drivers went an average of M=69 (s=5.35) whereas a sample n=30 pick up truck drivers wet an average of M=67 9 (s=5.30). What statistics should be run? Calculate Harlteys F-Max, one-tailed to two-tailed test, calculate confidence interval...
A researcher wanted to know if there is an age difference in the amount of time...
A researcher wanted to know if there is an age difference in the amount of time spent on social media. They collected data from 8 teenagers (13-18 years old) and 8 young adults (21-26 years old); they measured the average number of hours spent using all social media platforms over the course of a day. The mean hours spent on social media for teenage participants was 2.9750 with a variance of 1.0630 and the mean hours spent on social media...
We know that the population distribution for the number of hours that Americans sleep per night...
We know that the population distribution for the number of hours that Americans sleep per night is normally distributed with a mean of 6.7 and a standard deviation of 1.4. a) What is the probability that a single, randomly draw observation (i.e., American) from this distribution sleeps less than 5 hours per night? b) What is the probability that a randomly drawn observation falls between 6 and 8 hours per night? c) What is the probability that a randomly draw...
A survey was conducted to determine whether hours of sleep per night are independent of age....
A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Hours...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT