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 Given your decision, what type of error could you bemaking? Use data from Experiment 1 to answer thisquestion.

Name: 8:55 11 StudentA imperial.instructure.comExperiment 1: You believe th
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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

STM capacity has, population mean , m = 7 items and population sd, s = 2 items. A random sample of…

Answered: Given your decision, what type of error…

Math

Statistics

Given your decision, what type of error could you be making? Use data from Experiment 1 to answer this question.

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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Concept explainers

Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.

Topic Video

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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