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den301095 [7]
4 years ago
12

A high school teacher conducted a test of a new approach to teaching math. Students were given a pretest when their math class b

egan and a posttest at the end of the semester. The students' math performance improved. The teacher learned near the end of the semester, however, that in their science classes the students were using new computer software that included much of the math the teacher covered in his course. What threats to internal validity does the new computer software represent?
Computers and Technology
1 answer:
MakcuM [25]4 years ago
5 0

Answer:

It represents a threat of instrument change.

Explanation:

Internal validity is a method to determine if research has been performed properly. It is based on the number of confounding variables present in the experiment. If an experiment is carried out and confounding variables are avoided, the internal validity is high, and viceversa. In an ideal context, the experiment's internal validity will be high, which will mean its results will be trustworthy.

The students, by making use of a computer software, lowered the validity of the test performed by the teacher.

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You've just installed a new video card in a user's Windows workstation. When the system is powered on the screen is blank. You
valentinak56 [21]

After having verified that the video cable is installed correctly we should check to see that the computer's RAM is correctly fastened to the motherboard and functional.

The question states that the video card being installed is new, therefore we can comfortably assume that the card itself is not the issue. Other computer components that can cause a blank screen immediately upon powering on the workstation are:

  • RAM
  • Hard drive
  • Bad video driver.
  • Monitor input is faulty

however, assuming the installation was performed correctly, it is not likely to be caused by a bad video driver and a faulty monitor input is very improbable given that there are very few ways this can break to begin with.

A bad or missing hard drive may cause this kind of issue because the workstation will not have a windows file to boot. In most cases, this will not cause a completely blank screen without first allowing access to the BIOS.

After having verified that the video cable is installed correctly, the very next thing you should check is if the RAM is installed correctly. This is because the issue explained is exactly what will happen if a workstation attempts to boot without RAM, and also because it is the easiest fix among the possible causes and any troubleshooting should always be performed in order from the easiest fix to the most difficult.

To learn more visit:

brainly.com/question/2160588?referrer=searchResults

8 0
3 years ago
A compression scheme for long strings of bits called run-length encoding is described as follows: Rather than record each 0 and
Musya8 [376]

Answer: (B) Lossless compression

Explanation:

 According to the question, the given technique is the example of the lossless compression. The lossless compression is one of the technique that decompress the data into the original data form without any type of losses.

The lossless compression is the technique that usually compress the data, text and the databases. This technique also improve the compression rate helps in reconstruct the original data. It is used in various types of encoding methods, GNU tool and zip file.

3 0
3 years ago
This is a while loop question for Information technology.
aev [14]

Answer: use GitHub

Or stack overflow

Explanation:

6 0
3 years ago
The following is part of a log file taken from the machine on the network with the IP address of 192.168.1.106:__________.
Phantasy [73]

Answer:

Port scan targeting 192.168.1.106.

Explanation:

In the following question, there is some part of the question and options is missing.

In the following statement, when a file log is taken from the computer system which has Internet Protocol address is given in the statement and by the further details of the statement in which time and the port destination by examine those details of the Internet Protocol, the following port scan targeting the IP address 192.168.1.106.

3 0
3 years ago
When attaching a file or files in outlook 365 you select the attach command and then select the files location
mamaluj [8]

Answer:

When you click the attachment button a window pops up allowing you to select the file/s you want to upload

You can also drag and drop file/s this is an alternative method

Explanation:

Microsoft Outlook is a personal information manager software system from Microsoft.

Though primarily an email client, Outlook also includes such functions as calendaring, task managing, contact managing, note-taking, journal logging, and web browsing. Wikipedia

3 0
3 years ago
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