For a 4-units class like Statistics, students should spend average of 12 hours per week studying for the
class. A survey was done on students, and the distribution of total study hours per week is bell-shaped with
a mean of 15 hours and a standard deviation of 3 hours.
ic Success
raries Online
Use the Empirical Rule to answer the following questions.
and
hours on this
ft Teams
gs
a) 68% of the students spend between
class.
b) What percentage of the students between 6 and 18 hours on this class?
c) What percentage of the students above 9 hours?

Answers

Answer 1

) 68% of the students spend between

class.

[tex] \frac{68}{100} = \frac{17}{25 } [/tex]


Related Questions

I need help please? :(

Answers

Answer:

C

Step-by-step explanation:

Bought rings at 5$ each and bracelets at 8$ each, he bought 19 total items and spent $131. How many rings and bracelets were bought?

Answers

Answer:

Johannes Gutenberg - Wikipediahttps://en.wikipedia.org › wiki › Johannes_Gutenberg

Johannes Gensfleisch zur Laden zum Gutenberg was a German goldsmith, inventor, printer, and publisher who introduced printing to Europe with his ...

Occupation: Engraver, ‎inventor‎, and printer‎

Born: Johannes Gensfleisch zur Laden zum G...

Died: February 3, 1468 (aged about 68); Mainz‎, ...‎

Known for: The invention of the movable-type ...

‎Early life · ‎Printing method with... · ‎Legacy · ‎References

People also ask

Step-by-step explanation:

Find the median of the data in the dot plot below.

Answers

Answer:

The answer is 25.

Step-by-step explanation:

I hope this helps! Have a great rest of your day!

Answer:

25

Step-by-step explanation:

All the data values from least to greatest:

20, 23, 23, 25, 25, 27, 27, 27, 28

Since the data values are odd, the middle value is the median:

25

Hay 12 canicas en una bolsa y 6
de ellas son verdes. Si se elige
una canica, ¿cuál es la
probabilidad de que sea verde?

Answers

Answer:

50%.

Step-by-step explanation:

Dado que hay 12 canicas en una bolsa y 6 de ellas son verdes, para determinar la probabilidad de que si se elige una canica al azar, esta sea verde, se debe realizar el siguiente cálculo:

6 / 12 = X

0.5 = X

0.5 = 50/100

50/100 = 50%

Así, hay un 50% de probabilidades de que, eligiendo una canica al azar dentro de la bolsa, la canica elegida sea verde.

I need help please ?!!!!

Answers

Answer:

multiplication

Step-by-step explanation:

The inverse of division is multiplication

The inverse of addition is subtraction

The inverse of multiplication is division

The inverse of subtraction is division

multiplication!!!!!!! hope this helps

Convert 9 square feet to square inches

Answers

I believe it should be 1296 squared inches

Answer:

1296

Step-by-step explanation:

9 x 144

A square foot is a unit of area. It is the size of a square that is one foot on a side. It is 144 square inches, 1/9th of a square yard, or approximately 0.093 square meters.

A square inch is a unit of area. It is the size of a square that is one inch on a side. It is 1/144th of a square foot, or exactly 6.4516 square centimeters.

So, 9 x 144 = 1296

Choose all the equations for which x=3 is a solution

Answers

A and D

A= 3+1=4

D=4*3=12

A I think sorry if I'm wrong have a nice day

help pls
750000 + 4000 x 4%

Answers

750000+4000 x 4% is 750160

Answer:

750160 ez

Step-by-step explanation:

Write (2p)^4 without exponents.

Answers

Answer:

= 8p

Step-by-step explanation:

Steps

2p · 4

Remove parentheses: (a) = a

= 2p · 4

Multiply the numbers: 2 · 4 = 8

= 8p

Find the next two numbers in the following sequence. List the very next missing
number in Blank 1, and then list the second missing number in Blank 2.
1,4, 16, 64, _, _

Answers

Answer:

256,781

Step-by-step explanation:

Hence, the missing number in the sequence is [tex]1,4, 16, 64, 256,1024[/tex].

What is the sequence?

A sequence is a list of objects, typically numbers, in which order matters, repetition is allowed, and the same elements can appear multiple times at different positions in the sequence.

Here given sequence is

[tex]1,4, 16, 64, -,-,[/tex]

So,

[tex]1\\1(4)=4\\16(4)=64\\64(4)=256\\256(4)=1024[/tex]

Hence, the missing number in the sequence is [tex]1,4, 16, 64, 256,1024[/tex].

To know more about the sequence

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if an area of the rectangle below is 39 square feet, sides are x-2 and x+8 find the area of x

Answers

Answer:

x  = 5.

Step-by-step explanation:

The area of a rectangle can be determined by the following formula.

A = l ⋅ w  

l  stands for length or the longer side.

w  stands for width or the shorter side.

Now, we can plug the values we are given into the equation.

A = ( x − 2 ) ⋅ ( x + 8 )

The easiest way to multiply is to follow the acronym FOIL , which stands for First Outside Inside Last, and dictates the order in which you multiply these terms.

A = x 2 + 8 x − 2 x −16 = x 2 + 6 x − 16

Now, we can plug in the given value for the area.

39 = x 2 + 6 x − 16  

Next, we simplify by moving all terms to one side and factor the equation.

0 = x 2 + 6 x − 55

Finally, we factor the equation. This means we reverse-FOIL, trying to determine the two things that we multiplied together.

0= ( x − 5 ) ⋅ ( x + 11 )

If the equation ultimately equals zero, either  ( x − 5 )  or  ( x + 11 )  or both equal zero. Therefore, we set each equal to zero to find the value of  

x .

x − 5 = 0 x = 5 x + 11 = 0

x = − 11

Since  x  is a length, we know it cannot be negative. Thus, we can conclude that it equals 5.

Exact = 50 Approximate = 45

Answers

Answer:

Approximate of error = 11.11 % (Approx.)

Step-by-step explanation:

Given:

Exact value = 50

Approximate value = 45

Find:

Approximate of error

Computation:

Approximate of error = [(Exact value - Approximate value)/Approximate value]100

Approximate of error = [(50 - 45)/45]100

Approximate of error = [(5)/45]100

Approximate of error = [0.11111]100

Approximate of error = 11.11 % (Approx.)

a)
4x -1
=X+7
2
b) 3x +2=
2x +13
3
+
I
+

Answers

Answer:

a is x=7.5 b is x=1

Step-by-step explanation:

:))))))))

Find the value of each trigonometric ratio. Simplify if possible.

Answers

Answer:

15/8

Step-by-step explanation:

opp/adj=30/16=15/8

I need help with this I will mark you

Answers

Answer: A

Step-by-step explanation:

Answer: A or 46.50

Step By-Step Explanation:

ASAP-
Can someone please help me with this?

Answers

Answer:

90 I believe  

Step-by-step explanation:

Answer: A or B

Step-by-step explanation: A or B

What is the total amount of fabric needed to make the tent with the following dimensions?

Answers

The answer is 30 for all the dimensions

Find the area of this triangle.
Round to the nearest tenth.
12 cm
33°
5.5 cm
[?] cm2

Answers

Answer:

1/2 ab sinC =1/2(5.5×12)sin33 = 17.97

Step-by-step explanation:

Put the numbers in the equation ,a calculator will be better.

The area of the triangle is 18.0cm².

What is the sine rule for the area of the triangle?

The sine rule for the area of the triangle is defined as the area of the triangle that can be calculated by the product of the half of the two sides of the triangle and the sine of the angle between the two sides.

Area= Δ= (1/2)*a*b*sinC

where a and b are the length of the side BC and AC respectively. And angle C is the angle between the sides BC and AC.

Here given in the figure the triangle has two sides of lengths 12cm, and 5.5cm.

The angle between the sides is 33°.

Then using the sine rule for the area of the triangle

The area of the triangle= (1/2)*a*b*sinC

=(1/2)*12*5.5*sin 33°

=17.97≅ 18.0 cm²

Therefore the area of the triangle is 18.0cm².

Learn more about the sine rule

here: https://brainly.com/question/27174058

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The top of a coin has a radius of 2 cm.
What is the area of the top of the coin?
4π ​cm²
2π ​cm²
4 cm²
2 cm²

Answers

Answer:

I think is 2cm if I’m wrong plz correct me

Step-by-step explanation:

I’m guessing so no work

Find the arc length????????

Answers

Answer:

don't believe the other guy he is a scaming bot don't click the link

can someone help me on this?

Answers

Answer:

Step-by-step explanation:

12+98=
really confused on this one

Answers

Answer:

12+98=110

Step-by-step explanation:


PLS HELP CAN U DO B C D thanks

Answers

The median is 21 The mean is 23 The range is 11
Mode : 21

Media: 21

Mean: 23

Range: 11


Does anyone know?????

Answers

Answer:

I think it's C

Step-by-step explanation:

if it's not C then I'm sorry

Find 50% of 152:
Find 25% of 152:
Find 75% of 152:

Answers

I think:
50% of 152 = 76
25% of 152 = 38
75% of 152 = 114

Sorry if im wrong

Answer:

76

38

114

Step-by-step explanation:

50% of 152

= ( 50 / 100 ) x 152

= ( 1 / 2 ) x 152

= 152 / 2

= 76

25% of 152

= ( 25 / 100 ) x 152

= ( 1 / 4 ) x 152

= 152 / 4

= 38

75% of 152

= ( 75 / 100 ) x 152

= ( 3 / 4 ) x 152

= ( 3 x 152 ) / 4

= 3 x 38

= 114

Refer to the accompanying data set and use the 30 screw lengths to construct a frequency distribution. Begin with a lower class limit of 3.470 ​in., and use a class width of 0.010 in. The screws were labeled as having a length of 3 1/2 in

Answers

Answer:

Answer:

A) Total frequency = 30

B) Yes, the distribution is consistent with the label because the frequencies are greatest when the lengths are closest to the labeled size of 1/2 inches which is 0.5 inches.

Step-by-step explanation:

Since the class limit width is 0.010 from the question, we arrive at;

Class Limits Frequency

Length(Inches)

0.470 - 0.479 3

0.480 - 0. 489 5

0.490 - 0.499 9

0.500 - 0.509 12

0.510 - 0.519 1

Following is the frequency distribution table:

How to build a frequency table?

The lower limit is given as 3.470 inches.

The upper limit is 3.500 inches.

And the width of each class is 0.010 inches.

Therefore, the intervals will be:

3.470-3.480

3.480-3.490

3.490-3.500

To know more about frequency tables problems refer:

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Please help I have a lot of other due assignments and I don’t have Time and paper thx:)

Answers

Median: 69

First Quartile: 65.5

Third Quartile: 73

Interquartile Range: 7.5

Step-by-step explanation:

First, put all of the numbers in order.

63, 64, 67, 68, 70, 72, 74, 76.

Median

For the median, it is the center of the data set.

To find the median of this data set, add 68, and 70, then divide by 2.

The Median is 69.

First Quartile

To find the first quartile, find the range below the median (63-68).

Find the median of that range.

Add 64 & 67 together, then divide by 2.

The first quartile = 65.5

Third Quartile

Do the same as the first quartile, but do it with the range above the median (70-76).

Add 72 & 74 together, then divide by 2.

The third quartile = 73.

Interquartile Range

Now, take the first and third quartile, and subtract.

[tex]73-65.5=IR[/tex]

[tex]7.5 = IR[/tex]

The interquartile range is 7.5.

Convert grams (g) and milligrams (mg) to grams.

Answers

Answer:

1mg= 1000g

Step-by-step explanation:

1000 grams makes up 1miligram

can some one please help me? i will give brainlist!
This is a factorable polynominal with GCF:
5x^2y + 6x^2y^3 - 3x^2y^2
what are it's two other equivalent forms?
show how you got the answers so i can better understand how to do it

Answers

x^(2)y (6y^(2)-3y+5)

Find the prime factors of each term in order to find the greatest common factor (GCF).

Brainliest or a thank you please! sorry im wrong :(

Drag each equation to the value that makes it true.

Answers

Answer:

5h=60 needs to go in the last one

Step-by-step explanation:

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