Researchers were interested in the effect of sleep on memory consolidation. Twenty-four participants were randomly assigned to either a “Sleep” or “No-Sleep” group, such that there were 12 participants in each group. On the first day, all participants were flashed pictures of 15 different objects on a computer screen and asked to remember as many objects as possible. That night, the “Sleep” group got an ordinary night’s sleep. The “No-Sleep” group was kept awake until the second night. All participants got an ordinary night’s sleep on the second and third nights. On the fourth day, all participants were tested to see how many of the original 15 objects they remembered. The data is below. Conduct an independent samples t-test, two-tailed, alpha = .05. Sleep NoSleep 14 8 13 9 8 6 9 13 11 7 10 9 9 10 13 12 12 8 11 11 14 9 13 12 Write the null hypothesis in symbols and words. Write the alternative hypothesis in symbols and words. By hand, calculate the degrees of freedom. Show calculation. Use software to obtain the test statistic and p-value. Make a decision about the null using the p-value approach. Write the conclusion in APA style Compute and report the 95% CI. Interpret the 95% CI. Using the CI, make a decision about the null hypothesis. Be sure to explain your reasoning. Does this agree with your decision from part (2)?

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

Related questions

Question

Researchers were interested in the effect of sleep on memory consolidation. Twenty-four participants were randomly assigned to either a “Sleep” or “No-Sleep” group, such that there were 12 participants in each group. On the first day, all participants were flashed pictures of 15 different objects on a computer screen and asked to remember as many objects as possible. That night, the “Sleep” group got an ordinary night’s sleep. The “No-Sleep” group was kept awake until the second night. All participants got an ordinary night’s sleep on the second and third nights. On the fourth day, all participants were tested to see how many of the original 15 objects they remembered. The data is below. Conduct an independent samples t-test, two-tailed, alpha = .05.

Write the null hypothesis in symbols and words. Write the alternative hypothesis in symbols and words. By hand, calculate the degrees of freedom. Show calculation.
Use software to obtain the test statistic and p-value. Make a decision about the null using the p-value approach. Write the conclusion in APA style
Compute and report the 95% CI. Interpret the 95% CI. Using the CI, make a decision about the null hypothesis. Be sure to explain your reasoning. Does this agree with your decision from part (2)?

Expert Solution

Step 1: Write the given information

Given,

the data of the number of objects observed in 2 independent groups and 12 observations each.

The sub-parts need to be answered.

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 16 images

Follow-up Questions

Read through expert solutions to related follow-up questions below.

Follow-up Question

Use excel to obtain the test statistic and p-value. Make a decision about the null using the p-value approach. Write the conclusion in APA style
Compute and report the 95% CI. Interpret the 95% CI. Using the CI, make a decision about the null hypothesis. Be sure to explain your reasoning. Does this agree with your decision from part (2)?

Solution