1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Neko [114]
3 years ago
6

A quiz consists of 20 multiple-choice questions find mean and standard deviation

Mathematics
1 answer:
worty [1.4K]3 years ago
4 0

Since the problem is quite vague because the number of choice per question is not written here. I’ll just put for 4 choices and 5 choices each.

To compute for the 5 choices each:

Mean = np = 20 (1/5) = 4

Standard deviation = sqrt(npq) = sqrt (4*(4/5) = 1.79

 

To compute for the 4 choices each:

Mean = np = 20 (1/4) = 5

Standard deviation = sqrt(npq) = sqrt (5*(4/5) = 2

You might be interested in
Which angles are congruent to each other?
KatRina [158]

Answer:

5 and 7

Step-by-step explanation:

5 and 7 are vertical angles. The others are supplementary

7 0
3 years ago
In 4 days, the price of a share of stock rose 3/4 of a point. On average, what was the change in stock price everyday
RoseWind [281]

Answer:

3

Step-by-step explanation:

If you multiply 3/4 and 4 days together you will get 3 so the answer is 3

7 0
3 years ago
HELP PLEASE
iragen [17]

Answer:

third number = 4,

equation of y, y = 5x - 11

equation of n, n = 4x

equation of x, n + x + y =19

Step-by-step explanation:

so lets write evertything as a n equation. n + x + y =19. N is the first number, x is the second number, and y is the third number. We will write the equation for y as follows 5x - 11. N will be four times the second number, so 4x. If substitute the values for out equation for x we will find what x equals to. So (4x) + x + (5x - 11) = 19

10x = 30

x = 3.

Then you substiute the answer for x in the equation for y. This will get you 5(3) - 11

15 - 11

4 = third number

4 0
3 years ago
En la fábrica de Don Toño hoy fabricaron 320 pantalones, si los guardan en cajas donde caben 50 ¿cuántas cajas llenaron?
Scrat [10]

Answer:

6.4 Cajas

Step-by-step explanation:

320/50 = 6.4 Cajas

8 0
3 years ago
Paulo uses an instrument called a densitometer to check that he has the correct ink colour. For this print job the acceptable ra
sattari [20]
<span>If the range of the answer should be +/- 10% of the particular value, then you have to solve for the percentage of that particular value. Since the value given is 1.8, we thus want to find 10% of that: 1.8 * 10/100 = 0.18 Then, add this value to the original value of 1.8: 1.8+0.18 = 1.98 Next, subtract .18 from from the original value of 1.8: 1.8-0.18 = 1.62 The range will be between these two numbers, so the range is from 1.62 to 1.98.</span>
5 0
4 years ago
Other questions:
  • What is the domain of the given function?
    11·1 answer
  • What does prime factorization mean
    15·1 answer
  • Find the distance between the pair of points V(-2,5) M(0,-4)
    6·1 answer
  • A quadrilateral can have four obtuse angles.<br> True<br> False
    12·1 answer
  • Am i getting paid for answering questions @eurpoa2344
    9·2 answers
  • Give me the BRAINLIEST ANSWER
    13·1 answer
  • Justin wants to buy a new pair of Jean's. If the jeans were originally $50.00, but are on sale with a 30% discount, how much wil
    7·1 answer
  • : At a Pokemon award ceremony there are three types of medals to be awarded: Leader, Champion, and Ranger. There are 48 awardees
    14·1 answer
  • Explanation please...........
    10·2 answers
  • Your rent increased from $1,500 a month to $1,800 a month. This means your financial needs have___.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!