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3 years ago

12

Why is it important to use random assignment when determining which research participants will comprise the different treatment

groups in the study?

Computers and Technology

1 answer:

Temka [501]3 years ago

8 0

Explanation:

using random assignment keeps the study from becoming biased or untestable. it gives the results validity.

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Computer in country development explain explain explain in presentation.<br>

yaroslaw [1]

Answer:

A computer is a machine that can be programmed to carry out sequences of arithmetic or logical operations automatically. Modern computers can perform generic sets of operations known as programs. These programs enable computers to perform a wide range of tasks. A computer system is a "complete" computer that includes the hardware, operating system (main software), and peripheral equipment needed and used for "full" operation. This term may also refer to a group of computers that are linked and function together, such as a computer network or computer cluster

6 0

2 years ago

Given that it takes 0.08 ms to travel from one track to the next of a hard drive; that the arm is originally positioned at Track

daser333 [38]

Answer:

Time taken to travel from one track to the next = 0.08ms

Initial track= 15 0

4 (15-4)*(0.08)= 0.88

40 (40-4)*(0.08)= 2.88

35 (40-35)*(0.08)= 0.4

11 (35-11)*(0.08)= 1.92

14 (14-11)*(0.08)= 0.24

7 (14-7)*(0.08)= 0.56

----------------------------------------------

Total seek time=0.88+2.88+0.4+1.92+0.24+0.56=6.88ms

Explanation:

We caculate the seek time for each request, and then add them together to find the total seek time. The final track number for the current request becomes the current track of next request, and this process is repeated till the last request is processed.

4 0

3 years ago

Consider the following method, remDups, which is intended to remove duplicate consecutive elements from nums, an ArrayList of in

MAXImum [283]

Answer:

B. {1, 2, 2, 3, 3, 4, 5}

Explanation:

Given

The above code segment

Required

Determine which list does not work

The list that didn't work is $B.\ \{1, 2, 2, 3, 3, 4, 5\}$

Considering options (A) to (E), we notice that only list B has consecutive duplicate numbers i.e. 2,2 and 3,3

All other list do not have consecutive duplicate numbers

Option B can be represented as:

$nums[0] = 1$

$nums[1] = 2$

$nums[2] = 2$

$nums[3] = 3$

$nums[4] = 3$

$nums[5] = 4$

$nums[6] = 5$

if (nums.get(j).equals(nums.get(j + 1)))

The above if condition checks for duplicate numbers.

In (B), when the elements at index 1 and 2 (i.e. 2 and 2) are compared, one of the 2's is removed and the Arraylist becomes:

$nums[0] = 1$

$nums[1] = 2$

$nums[2] = 3$

$nums[3] = 3$

$nums[4] = 4$

$nums[5] = 5$

The next comparison is: index 3 and 4. Meaning that comparison of index 2 and 3 has been skipped.

<em>This is so because of the way the if statement is constructed.</em>

3 0

3 years ago

Create a program to deteate a program to determine whether a user-specified altitude [meters] is in the troposphere, lower strat

nordsb [41]

Answer:

#include <iostream>

using namespace std;

int main()

{

float altitude;

cout<<"Enter alttitude in meter";

cin >>altitude;

if(altitude<0 || altitude > 50000)

{

cout<<"Invalid value entered";

return 0;

}

else{

if(altitude<= 10000)

{cout <<"In troposphere "<<endl;}

else if(altitude>10000 && altitude<=30000)

{cout <<"In lower stratosphere"<<endl;}

else if(altitude>30000 && altitude<=50000)

{cout <<"In upper stratosphere"<<endl;}

}

return 0;

}

Explanation:

Define a float type variable. Ask user to enter altitude in meters. Store value to altitude variable.

Now check if value entered is positive and less than 5000,if its not in the range of 0-50,000 display a termination message and exit else check if it's in less than 10000, in between 10000 and 30000 or in between 30000 and 50000.

10,000 is above sea level is troposphere.

10,000-30,000 is lower stratosphere.

30,000-50,000 is upper stratosphere.

3 0

3 years ago

Match the correct pairs of column A and B to prove your computer

ohaa [14]

Explanation:

1 Ms word - b. Word processing software

2 Pagemaker - c desktop publishing

3 Ms excel - f finance and data analyses

4 dbase - a database management system

6 Mcafee/Norton - d anti-virus software

7 virus - h computer program that can replicate itself

8 inbox, compose,.............. - parts of an email account

5 0

2 years ago