8:55 11 StudentA imperial.instructure.comExperiment 1: You believe that caffeine can improvethe capacity of short-term memory (STM). It iswidely known that STM capacity 7 items (m=7)onaverage with a standard deviation of 2 items (s=2).You randomly sampled n=8 participants and havethen drink a large quantity of coffee. Fifteen minuteslater you administer a STM test to each participantand measure the number of items remembered. Thedata are shown below. Use these data to answer thefollowing questions. Excel should be used to obtainthe sample mean, standard deviation and standarderror.Perform a 2-tailed z-test with a=0.05 to determine ifcaffeine influences memory.NumberParticipantof items129374667789 What is the zobserved Value for the hypothesis test?Use absolute value and round to two decimals. Usedata from Experiment 1 to answer this question.

Name: 8:55 11 StudentA imperial.instructure.comExperiment 1: You believe th
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: 8:55 11 StudentA imperial.instructure.comExperiment 1: You believe that caffeine can improvethe capacity of short-term memory (STM). It iswidely known that STM capacity 7 items (m=7)onaverage with a standard deviation of 2 items (s=2).You randomly s

Z-test is a hypothesis test in which the z-statistic follows a normal distribution

Answered: Perform a 2-tailed z-test with a=D0.05…

Math

Statistics

Perform a 2-tailed z-test with a=D0.05 to determine if caffeine influences memory.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

What does am/n mean ?
A researcher found that the two groups (n=25 in each group) they tested were significantly different from each other with a t-value of 2.91, which has a corresponding p-value of p=.06. Report the findings in APA number format.
A researcher found that the two groups (n=25 in each group) they tested were significantly different from each other with a t-value of 2.91, which has a corresponding p-value of p=.06. For this study, report the statistics in APA format.
A correlation value of -0.92 is positive and strong positive and weak positive negative and strong
A researcher is interested in hamster wheel-running activity during the summer versus the winter. She suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. She records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February. The data are collected, and the results show an average difference score of MD - 5.7 and a sum of squares of SS = 2,851.44. What is the sample standard deviation (s) for the D scores? (one decimal)
A researcher computes the correlation coefficient r= 0.4212 for an explanatory and response variable. What proportion of the changes in the response variables value is accounted for by the change in the explanatory variable's value? Give your answer to four decimal places.