Which is the correct statement of the nullhypothesis? Use data from Experiment 1 to answerthis question.O u +7O µ<7O µ = 7O µ>7 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

Answered: Which is the correct statement of the…

Which is the correct statement of the null hypothesis? Use data from Experiment 1 to answer this question. O u <7 O u = 7 H>7

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

8:55 1
1 Student
A imperial.instructure.com
Experiment 1: You believe that caffeine can improve
the capacity of short-term memory (STM). It is
widely known that STM capacity 7 items (m=7)on
average with a standard deviation of 2 items (s=2).
You randomly sampled n=8 participants and have
then drink a large quantity of coffee. Fifteen minutes
later you administer a STM test to each participant
and measure the number of items remembered. The
data are shown below. Use these data to answer the
following questions. Excel should be used to obtain
the sample mean, standard deviation and standard
error.
Perform a 2-tailed z-test with a=0.05 to determine if
caffeine influences memory.
Number
Participant
of items
1
2
9
3
7
4
6
6
7
7
8
9

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