quiz consists of 20 multiple choice questions, each with five possible answers, only one of which is correct. If a student guesses on each question, what is the mean and standard deviation of the number of correct answers?
mean: 4; standard deviation: 1.78885438
mean: 10; standard deviation: 1.78885438
mean: 4; standard deviation: 2
mean: 10; standard deviation: 3.16227766

Answers

Answer 1

Answer:

I think mean 10; 3.16

Step-by-step explanation:


Related Questions

Round yo The nearest ten 834,692.
Help me please!!

Answers

The answer should be 834, 690

hope this helps!

834,692

If the number is less than 5, you keep the the 90 the same.

If the number is more than 5, the new number would be 834,700.

The answer is

834,690

Kim works at a shoe store and makes $12.50 per hour. Last week she worked 34 hours, how much will her pay check be?
$46.50


$42.50


$465.00


$425.00
Will give brainliest

Answers

Answer:

$425.00

Step-by-step explanation:

12.5 times 34=$425

What is the correct rule for y, in terms of x?

Answers

Answer:

Step-by-step explanation:

The correct rule for y in terms of x is

y = 3x - 4

we can check even

here when x = 1

y = 3 * 1 - 4 = - 1

similarly

when x = 2

y = 3 * 2 - 4 = 2

and so on you can check.

hope it helps :)

Answer:

the rule is y=3x-4

Step-by-step explanation:

m=y2-y1/x2-x1

m=2--1/2-1

m= 3/1

m=3

general equation of a line,

y=mx+c

if y=3x+c

if x=1 y=-1

-1=3+c

-4=c

therefore y=3x-4

please please i need help i will mark u brill

Answers

Answer:

Step-by-step explanation:

65÷b+8×4=20

Put the value of b=5 in equation

65÷5+8×4=20

According to BDMAS rule

13+32=20

45=20

Bring the terms on one side

45-20=25 Answer

Answer:

false

Step-by-step explanation:

use bidmas :)

ok, let's rewrite this for b = 5

65 ÷ 5 + 8 × 4 = 20

now put brackets

(65 ÷ 5) + (8 × 4) = 20

          (13) + (32) = 20

              13 + 32 = 45

                     45 ≠ 20

false

hope this helped and good luck!

-cheesetoasty




Bobby filled a bucket with 5/6 gallon of water and 1/12 gallon of juice. What
is the total amount of liquid Bobby put in the bucket?
+
А. 1/3
B.5/6
C.3/4
D.11/12

Answers

Hi,

To add two fraction, they must have  the same denominator.

So  5/6  =  10/12

Now :   10/12 + 1/12 = 11/12

Answer:

D is the correct option

hope it helps you

please mark me as brainlist

As the teams fundraiser,Agnes and Betty both sold candy bars at the end of the fundraiser Agnes determined that she sold 8 more candy bars than Betty sold if Agnes and Betty sold a total of 348 candy bars how many did Betty sell the

Answers

Answer:

356

Step-by-step explanation:

2. Lara collects shark's teeth. She has 72 teeth. She wants to put them in special cases. Each case can hold 10 teeth. How many cases should Lara buy? Draw a picture to find the answer. Then explain how you know your answer is correct.​

Answers

Answer:

Lara should buy 8 boxes

Step-by-step explanation:

To start we would need to do

72/10

since 72 isn't a multiple of ten we can round it down to 70, then do

70/10=7

since we still have two teeth, we can put them in their own box so

7+1=8

Given g(x) = -5x – 4, solve for x when g(x) = 1.

Answers

Answer:

g (1) = -5(1) -4

-5-4

-9............. .......

Step-by-step explanation:

-5(1)-4=-5-4=-9 Answer

hope it helps

When an object moves on a circular path, the centripetal force varies directly as the square of the velocity and inversely as the radius of the curve. If the force is 640 lb for a velocity of 20 mi/h and radius of 5 m, find the radius for a velocity of 30 mi/h and a force of 1800 lb.

Answers

Answer: I think it's 40

Step-by-step explanation:

I don't know, I just need points. If you take the 640 and divide it by the nearest angular velocity, then square it, then divide by the radius, you get Bolivia

Which statements are true about trapezoid ABCD and
its translated image, ABCD? Select two options
3
2
The role for the translation can be written as I
1
3
The rule for the translation can be written as
The rule for the translation can be written as
The rule for the translation can be written as
Trapezoid ABC has been translated 3 units to the
night and 1 on Up
farandi

Answers

Answer:

The rule for the translations can be written as T -3,1(x,y).

The rule for translations can be written as (x,y)➡️(x-3,y+1).

Step-by-step explanation:

Answer:

A, and D

Step-by-step explanation:

Took Unit test edge 2022


PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!

Answers

Answer:

QPN and TSU

Step-by-step explanation:

They're both exterior angles and they are both alternate to each other.

Whats is -100+500 you get it ok

Answers

Answer:

400 pick mine as Brainlest

Step-by-step explanation:

Answer:

It is 400

Step-by-step explanation:

If you reverse it to make it easier on yourself.

500-100 =400

PLEASE HELP ME ASAPPP!!!!!!

Answers

Answer:

2   1/4 inches

Step-by-step explanation:

1/4 per 1 foot so if there are 9 feet it would be 9/4 then converte that to a proper fraction which is 2  1/4

HALP!!!!!!!!!!!!!!!!!!
If a quadratic function has roots 2 and -7, what are the factors of the function?

Answers

A negative number.......

What is the area of the triangle?
6 yd.
2 yd.

Answers

Answer:

12 yd.

Step-by-step explanation:

The radius of a circle is 4 kilometers. Use 3.14 for ​. What is the circle's circumference?

Answers

C = πd
C = 3.14 x 9
C = 25.12

A ticket selling company charges a service charge of $4 to buy tickets.
Each ticket costs $55. Which equation represents the cost of buying
tickets through the company.

Answers

Answer=D, Y=55x + 4. This is the answer.......

Btw: this is my first answer I done ;)

D. 55x + 4 is the answer :)

Please help please help please and will mark branliest

Answers

Answer:

m=w+6

Step-by-step explanation:

Use 2 points to find the slope, which is 1.

The y intercept is 6

Solve the system of equations 2x - y = 13 and - 3x + 2y = - 18 by combining the equations .

Answers

Answer:

2X-Y = 13

-3X+2Y = -18

(2X-3X-Y+2Y) = 13-18

-X +Y= -5

A mans basic wage for a 40 hour week is 160 . He is paid 5 per hour for overtime .If he fors for 6.5 hours overtime in a certain week , his wages for that week is​

Answers

Answer: $192.50

Step-by-step explanation:

wages for 40 hrs + wages for overtime work

$160.00 + 6hrs × $5.00 + $2.50 (1/2 hrs)

$192.50

Credit: anjalijalan3126

The area of the figure below is ___ cm2. Round to the nearest hundredth where necessary. PLEASE HELP! WILL MARK BRAINLIST! THANK YOU!

Answers

Answer:

20.9

Step-by-step explanation:

its the same as the other side, don't think to much about it

Answer:

20.9 Is the right answer

Step-by-step explanation:

hope this helps

Please please i need help i will mark u brill

Answers

[tex] \bf\green{7.8 \times c + 3.4 = 19} \\ \\ \bf\red{7.8 \times 2 + 3.4 = 19} \\ \\ \blue{\bf{15.6 + 3.4 = 19}} \\ \\ \bf \red{\boxed{ \underline{\underline{\pink{ 19 = 19}}}}}[/tex]

Haha, very easy... :)

Which of the following triangles can be proven similar through AA?

Answers

Its a
Hope it helps

5th grade math. correct answer will be marked brainliest

Answers

Answer:

Step-by-step explanation:

The answer is 4/8 or 1/2 pie

Answer:

The answer is 4/8 or 1/2 pie

Have an amazing day :)

Solve for g.............

Answers

Answer:

G = 3

Step-by-step explanation:

Answer:

g=3

Step-by-step explanation:

reverse the whole question:

so all the minus would convert into an addition sign

hope that helps

please mark as brainliest if correct

have a great day/night.

thank you

19NBoli

A
b
c
d
thank youuuuuuuuuu ​

Answers

Answer:

[tex]\frac{4x}{x-2}+\frac{7}{x-2}[/tex]

Step-by-step explanation:

The general rule for add or subtracting fractions is that the fractions must have a common denominator, meaning that the value under the fraction bar must be the same. This rule is also applicable for algebraic fractions.

Therefore, when the question asks "Which of the following can be added without altering any of the fractions?", one should be looking for two fractions with a common denominator. Thus the answer would be the first option, which is the following;

[tex]\frac{4x}{x-2}+\frac{7}{x-2}[/tex]

Damian is trying to pick out an outfit for the first day of school. He can choose from 3 pairs of pants, 5 t-shirts, 8 sweaters or hoodies, and 5 pairs of shoes. How many different outfits does Damian have to choose from? (Don't answer if you don't know and no bots with the fake links pls)

Answers

Answer:

64 outfits I think.

Step-by-step explanation:

The number of the different outfits do Damian have to choose is 600.

What are permutation and combination?

A permutation is an act of arranging the objects or elements in order.

Combinations are the way of selecting objects or elements from a group of objects or collections, in such a way the order of the objects does not matter.

Different outfits do Damian have to choose, will be;

⇒3C₁×5C₁×8C₁×5C₁

⇒3×5×8×5

⇒600

Hence,the number of the different outfits do Damian have to select is 600.

To learn more about the permutation and combination, refer:

https://brainly.com/question/13387529

#SPJ2

Could someone pls help?

Answers

12%









She Henie tjebrirbid

2. A right rectangular container is 10 cm wide and 24 cm long and contains water to a depth of 14cm. A stone is placed in the
water and the water rises 3.4 cm. Find the volume of the stone.

Answers

Answer:

This answer is A

Step-by-step explanation:

Answer:

Subtraction. 10.6 is your answer.

Step-by-step explanation:

14 - 3.4 = 10.6

subtract the rock's volume from the volume of the water.

What is the probability that a randomly selected date in the year 2021 is not in the month of October or
November?
Type your answer into the box as a decimal. Round to the nearest thousandth.

Answers

Answer:

0.833

Step-by-step explanation:

There are 365 days in 2021

There are 31 days in October

There are 30 days in November

(365-61)/365 = 0.833

Other Questions
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