12. A statistics student received a grade of 85 on a statistics midterm. If the corresponding z
score equaled +1.50, and the standard deviation equaled 7, what was the average grade on
this exam?
a. 95.5
b. 74.5
c. 78.0
d. Cannot determine without knowing how many took the exam
e. None of the above
74.5
(85-64.5)/7
1. Which of the following is NOT a Google product? (Points : 1)
Books
Scholar
You Tube
Facebook
Question 2. 2. While doing online research you enter this keyword search with a truncation character: man* Which of the following would not be a possible response to your search? (Points : 1)
Mansion
Men
Mantle
Manny
Question 3. 3. Google uses what strategy for matching web pages to your searching requests? (Points : 1)
Past history
PageRank
Bookmarks
AdWord
Question 4. 4. Which of the following options would return a true statement for the sentence: The sky is bluest early in the morning. (Points : 1)
Sky and blue
Sky not morning
Sky or dark
Sky and evening
Question 5. 5. If you wanted to look up an article from the Chicago Tribune the best place to start would be: (Points : 1)
EBSCOHost.
JSTOR.
ProQuest.
NewsBank.
Question 6. 6. When a video becomes so popular online that people begin tweeting, blogging, and emailing their friends about it, it is called: (Points : 1)
gossip.
hits.
viral.
infectious .
Question 7. 7. Which of the following is NOT an example of a metasearch engine? (Points : 1)
Forelook
Google
Soovle
Searchengineland
Question 8. 8. In 2007 Google Maps unveiled Street View. What does this feature allow you to do? (Points : 1)
View maps
View Satellite images
View homes
View real-time streets
Question 9. 9. Boole’s theories of logic set the foundation for what aspect of computing today? (Points : 1)
Information
Software
Hardware
Searching
Question 10. 10. Of the following individuals, who was the most recent to develop information searching tools online? (Points : 1)
Otlet
Wells
Bush
Brin
Question 10. 10. Of the following individuals, who was the most recent to develop information searching tools online?
To determine the average grade on the exam, we need to use the formula for z-score. The formula is:
z = (x - μ) / σ
Where:
- z is the z-score
- x is the observation (grade in this case)
- μ is the population mean (average grade on the exam)
- σ is the standard deviation
In this case, we know that the z-score is 1.50 and the standard deviation is 7. We need to solve for the average grade (μ).
Rearranging the formula, we have:
x = z * σ + μ
Plugging in the given values, we have:
85 (grade) = 1.50 * 7 (standard deviation) + μ
85 = 10.5 + μ
μ = 85 - 10.5
μ = 74.5
Therefore, the average grade on the exam is 74.5.
Therefore, the answer to the question is (b) 74.5.