Ms. Davis is doing an activity with her statistics students where she gives them a 20-question multiple choice test, and they kn

Question

3 years ago

6

Ms. Davis is doing an activity with her statistics students where she gives them a 20-question multiple choice test, and they kn

ow none of the answers. Students need to guess on every question, and each question has 5 possible choices, 1 of which is correct. What are the mean and standard deviation of the number of questions that each student gets correct?

Mathematics

1 answer:

Anvisha [2.4K] · Answer 1 · 2022-05-02T14:41:21+03:00

Answer:

Average: 4

Standard Deviation: 0

Step-by-step explanation:

Because we don't know how each student did we are going to assume that they all got 20% of the questions right

20% of 20 is 4

Which means that we can assume each student got 4 questions correct

Because all entries are the same the standard deviation is 0