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otez555 [7]
3 years ago
7

A researcher is interested in whether working memory is influenced by lack of sleep. The researcher administered a measure of wo

rking memory to a group of subjects at 8 A.M. on Day 1 of the study and then again at 8 A.M. on Day 2 of the study, after keeping the subjects awake the entire night. What kind of statistical test should be conducted on these data?
Computers and Technology
1 answer:
ale4655 [162]3 years ago
5 0

Answer:

Dependent sample t-test

Explanation:

The Dependent sample t-test compares the mean score of measurements in one group to that of another other group. It mainly used when analyzing comparable sample units as it pairs repeatable observations within a time frame.

For example, a researcher administered a measure of working memory to a group of subjects at 8am on Day 1 of the study and then again at 8am on Day 2 of the study, after keeping the subjects awake the entire night.

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PLEASE HELP
Zinaida [17]

Answer:

B from you search question carefully and identify the key word

Explanation:

3 0
3 years ago
Read 2 more answers
Write a program that will open the file random.txt and calculate and display the following: A. The number of numbers in the file
Rama09 [41]

Answer:

Here is the C++ program:

#include <iostream>  //to use input output functions

#include <fstream>  //to manipulate files

using namespace std;  //to identify objects like cin cout

int main(){  //start of main function

  ifstream file;   //creates an object of ifstream

   file.open("random.txt"); //open method to open random.txt file using object file of ifstream

       

    int numCount = 0;  //to store the number of all numbers in the file          

    double sum = 0;   //to store the sum of all numbers in the file

    double average = 0.0;   //to store the average of all numbers in the file

    int number ; //stores numbers in a file

                 

        if(!file){   //if file could not be opened

           cout<<"Error opening file!\n";    }   //displays this error message

       

       while(file>>number){   //reads each number from the file till the end of the file and stores into number variable

           numCount++; //adds 1 to the count of numCount each time a number is read from the file          

           sum += number;  }  //adds all the numbers and stores the result in sum variable

           average = sum/numCount;  //divides the computed sum of all numbers by the number of numbers in the file

     

       cout<<"The number of numbers in the file: "<<numCount<<endl;  //displays the number of numbers

       cout<<"The sum of all the numbers in the file: "<<sum<<endl;  //displays the sum of all numbers

       cout<<"The average of all the numbers in the file: "<< average<<endl;  //displays the average of all numbers

       file.close();     }  //closes the file    

   

Explanation:

Since the random.txt is not given to check the working of the above program, random.txt is created and some numbers are added to it:

35

48

21

56

74

93

88

109

150

16

while(file>>number) statement reads each number and stores it into number variable.

At first iteration:

35 is read and stored to number

numCount++;  becomes

numCount = numCount + 1

numCount = 1      

sum += number; this becomes:

sum = sum + number

sum = 0 + 35

sum = 35

At second iteration:

48 is read and stored to number

numCount++;  becomes

numCount = 1+ 1

numCount = 2    

sum += number; this becomes:

sum = sum + number

sum = 35 + 48

sum = 83

So at each iteration a number is read from file, the numCount increments to 1 at each iteration and the number is added to the sum.

At last iteration:

16 is read and stored to number

numCount++;  becomes

numCount = 9 + 1

numCount = 10    

sum += number; this becomes:

sum = sum + number

sum = 674 + 16

sum = 690

Now the loop breaks and the program moves to the statement:

       average = sum/numCount;  this becomes:

       average = 690/10;

       average = 69

So the entire output of the program is:

The number of numbers in the file: 10                                                                                                           The sum of all the numbers in the file: 690                                                                                                     The average of all the numbers in the file: 69

The screenshot of the program and its output is attached.

5 0
3 years ago
Write a recursive function num_eights that takes a positive integer pos and returns the number of times the digit 8 appears in p
nata0808 [166]

Answer:

Explanation:

The following is written in Java. It creates the function num_eights and uses recursion to check how many times the digit 8 appears in the number passed as an argument. A test case has been created in the main method and the output can be seen in the image below highlighted in red.

  public static int num_eights(int pos){

       if (pos == 0)

           return 0;

       if (pos % 10 == 8)

           return 1 + num_eights(pos / 10);

       else

           return num_eights(pos / 10);

   }

7 0
3 years ago
In python 3.17 LAB: Convert to dollars
krok68 [10]

To convert the inputs to dollars and cents, we make use of a combination of multiplication and addition.

The program written in Python where comments are used to explain each line is as follows:

<em />

<em>#This gets input for the number of quarters</em>

quarters = int(input("Quarters: "))

<em>#This gets input for the number of dimes</em>

dimes = int(input("Dimes: "))

<em>#This gets input for the number of nickels</em>

nickels= int(input("Nickels: "))

<em>#This gets input for the number of pennies</em>

pennies= int(input("Pennies: "))

<em>#This converts the amount to dollars and cents</em>

dollars = quarters * 0.25 + dimes * 0.10 + nickels * 0.05 + pennies * 0.01

<em>#This prints the amount to 2 decimal places</em>

print("Amount ${:.2f}".format(dollars))

Read more about Python programs at:

brainly.com/question/22841107

7 0
2 years ago
Which type of service offers a preconfigured testing environment for application developers to create new software applications?
Vaselesa [24]

A type of service which offers a preconfigured testing environment for application developers to create new software applications is: B - Platforms as a Service (PaaS).

<h3>What is cloud computing?</h3>

Cloud computing can be defined as a type of computing service that requires the use of shared computing resources over the Internet, rather than the use of local servers and hard drives.

<h3>The categories of cloud service.</h3>

Generally, cloud computing comprises three (3) service models which includes the following;

  • Infrastructure as a Service (IaaS).
  • Software as a Service (SaaS).
  • Platform as a Service (PaaS).

In conclusion, a type of service which offers application developers a preconfigured hosting and testing environment to create new software applications is Platforms as a Service (PaaS).

Read more on Platform as a Service here: brainly.com/question/24233315

#SPJ1

6 0
1 year ago
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