E
Homework: Practice
Exam 3
Question 7
Find the standard deviation for the group of data items.
14, 15, 16, 16, 17, 18
The standard deviation is
(Simplify your answer. Round to two decimal places as needed.)
9

Answers

Answer 1

Answer:

Step-by-step explanation:

EHomework: PracticeExam 3Question 7Find The Standard Deviation For The Group Of Data Items.14, 15, 16,

Related Questions

What is the cardinal number of the set {-1,3,7,52,36,19,-6}

Answers

Answer:

can you please send me another one

Can someone plz solve this for me

Answers

Answer: [tex]y^\frac{1}{8}[/tex]

Step-by-step explanation:

Ok so when taking roots the number in the little corner at the left of the radical sign (if there is one) is the root you take. It could be the 4th root, 6th root, or the x root. You don't have to use the radical sign though, you can use an exponent to write it. All you have to do is take the reciprocal of the number to find what to write for the exponent. So for those examples it would be [tex]\frac{1}{4}, \frac{1}{6} ,\frac{1}{x}[/tex]. The number in the top left of the radical sign is 8 so the answer would be [tex]y^\frac{1}{8}[/tex]

Mr. Mason’s class is going on a field trip. There are 27 students. There will be 1 adult for every 9 students. Mr. Mason wants to know how many adults (n) are needed for the field trip. Which of the following equations should he use?
A. 9n + 27
B. 27 – 9n
C. 9n = 27 - 1
D. 9n = 27

Answers

Answer:

D. 9n = 27

Step-by-step explanation:

If we need one adult for every 9 students, we can represent that as 9n:

if n is the number of adults.

Because we have 27 students, the equation 9n = 27 works.

A better way of formatting the equation is:

n = 27/9

Because it directly shows what the number of adults is, but with some reformatting, it is clearly the same equation.

I think it would be d
I hope that helps?

I’m having trouble finding the answers to this problem

Answers

Step-by-step explanation:

Solve by Subsitution

[tex]x = 50 - y[/tex]

Replace this into the second equation

[tex]y(50 - y) = 300[/tex]

[tex]50y - {y}^{2} = 300[/tex]

Write in standard form

[tex] - {y}^{2} + 50y = 300[/tex]

Use the quadratic formula, and our answer will be

(6.97,43.02)

(43.02,6.97)

Find the time required for an investment to double in value if invested in an account paying 3% compounded quarterly.

Answers

Answer: [tex]6.12\ \text{years}[/tex]

Step-by-step explanation:

Given

Rate of interest is [tex]r=3\%[/tex] compounded quarterly

So, annually it is [tex]r=12\%[/tex]

Suppose [tex]P[/tex] is the Principal and A is the amount after certain time period.

Amount in Compound interest is given by

[tex]\Rightarrow A=P[1+r\%]^t[/tex]

for given conditions

[tex]\Rightarrow 2P=P[1+0.12]^t\\\Rightarrow 2=(1.12)^t\\\\\Rightarrow t=\dfrac{\ln (2)}{\ln (1.12)}\\\\\Rightarrow t=6.116\approx 6.12\ \text{years}[/tex]

It take [tex]6.12\ \text{years}[/tex] to double the invested amount.

Sketch a graph of f (x) = −1

Answers

Answer:

Step-by-step explanation:

f(x) = -1 is actually the same as y = -1.  Find y = -1 on the y axis and then draw a horizontal line through this point.  The resulting graph is that called for here.

A number is multiplied by 5 and the answer when divided by 3 gives 1315 . what is the number ?

Answers

Answer:

5×789/3

Step-by-step explanation:

According to the question you could simplify the above numbers .

Answer:

789

Step-by-step explanation:

let the number=x

[tex]\frac{5x}{3}=1315\\5x=1315 \times 3=3945\\x=\frac{3945}{5}=789[/tex]

f(x)=-2x^2+x-5 find f(5)

Answers

f(5) = -50

Hope it helps you...

Which system of linear inequalities has the point (3, -2) in its solution set?

Answers

Answer:

None of the given system of linear inequalities

Step-by-step explanation:

Given

[tex](x,y) =(3,-2)[/tex]

Required

The line inequalities with the above solution

The first set of linear inequalities, we have:

[tex]y < -3[/tex]

[tex]y \ge \frac{2}{3}x - 4[/tex]

[tex]y < -3[/tex] implies that the values of y is -4,-5.....

While [tex](x,y) =(3,-2)[/tex] implies that y = -2

Hence, the first set is wrong

The second set of linear inequalities, we have:

[tex]y > - 2[/tex]

[tex]y \ge \frac{2}{3}x - 4[/tex]

[tex]y > - 2[/tex] implies that the values of y is -1,0.....

While [tex](x,y) =(3,-2)[/tex] implies that y = -2

Hence, the second set is wrong

The system of linear inequalities having the point (3, -2) in its solution set is y > -3; y ≥ 2/3x - 4.

What are systems of linear inequalities?

A system of linear inequalities is known to be a composition of  linear inequalities that can be found in the same variables.

The graph that is showing  y > -3; y ≥ 2/3x - 4

-2 > -3  is true

y ≥ 2/3x - 4

-2 ≥ -2  is true

Therefore,  y > -3; y ≥ 2/3x - 4 has the point (3, -2) in its solution set.

Learn more about  linear inequalities from

https://brainly.com/question/12649320

Water is leaking out of an inverted conical tank at a rate of13400cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height8meters and the diameter at the top is6meters. If the water level is rising at a rate of24centimeters per minute when the height of the water is5meters, find the rate at which water is being pumped into the tank in cubic centimeters per minute.

Answers

9514 1404 393

Answer:

  2,664,118.8 cm³/min

Step-by-step explanation:

The diameter at the water level of 5 m is (5/8)(6 m) = 3.75 m, so the area of the water surface is ...

  A = (π/4)d² = (π/4)(3.75 m)² ≈ 11.044662 m²

When rising at the rate of 24 cm/min, the volume is increasing at the rate ...

  (110,446.62 cm²)(24 cm/min = 2,650718.8 cm³/min

The input volume must be sufficient to accommodate this increase as well as the leakage. Then the input volume is ...

  2,650718.8 cm³/min + 13,400 cm³/min = 2,664,118.8 cm³/min

on monday, sammy the storekeeper decided the increase the price of avocados by 20%. on tuesday he increases this price by another 25%. what percent of the original avocados after both increases? on Wednesday, sammy decides to return the avocados to their original price. by what percent must he decrease the tuesday price?

Answers

Answer:

I think 55%

Step-by-step explanation:

Answer:

Increases = 50%On Wednesday, sammy must decrease 50% to return to original price

Step-by-step explanation:

price on monday go to: 100% + 20% = 120% = 1,2 x first price

price on tuesday go to: 125% of 120% = 1,25 x 1,2 = 1,5 x first price

Increases = 50%

on Wednesday, sammy must decrease 50% (of price after second increases) to return to original price

For example for understanding:

If original price is $100

firs increase: new price: $100 + $20 = $120

second increase: new new price: $120 + $30 = $150

final price - original price = $150 - $100 = $50

And  icreases/original = $50/$100 =0,5 = 50%

For return to orignial price, sammy must have to reduce 50% the price of avocados in wednesday

For f(x) = 4x2 + 13x + 10, find all values of a for which f(a) = 7.
The solution set is ???

i keep getting -2, -1/5 ... but it’s telling me it’s wrong. help!.

(Type an integer or a simplified fraction. Use a comma to separate answers as needed.)

Answers

Answer:

0.84

Step-by-step explanation:

4x2+13a+10=7

13a=7-10-8

13a=-11

a=-11:13

a=0.84


oliver walks 5/8 of a mile in 1/6 of an hour. What is his unit rate in miles per hour?

Answers

Answer:

3.75 miles per hour

Step-by-step explanation:

(5/8)/(1/6)=3.75 mph, or you could do 5/8 x 6, since 1/6 x 6 equals one hour

Answer:

3 3/4 miles per hour

Step-by-step explanation:

Take the miles and divide by the hours

5/8 ÷ 1/6

Copy dot flip

5/8 * 6/1

Rewriting

5/1 * 6/8

5/1 * 3/4

15/4

3 3/4


If mZACB = 180°, and m2DCB = 1350,
then mZDCA = [? ]°

Answers

Answer:

m<DCA=45°

Step-by-step explanation:

m<DCA=m<ACB-m<DCB

m<DCA=180°-135°

m<DCA=45°

1. Find the equation of each of the straight line graphs that passes through the given
points.
(i) (1, 7) (2, 10)
(ii) (3, -1) (-2, 9)
(iii) (4, 3) (8,4)
(iv) (2, -5) (-2, 7
(v) (-1, -8) (3, 12)
(vi) (-5, 1) (10, –5)

(viii) (2, 2) (0, -4)

Answers

Answer:

25.987957

Step-by-step explanation:

Consider the following data representing the price of refrigerators (in dollars).14051405, 11211121, 13391339, 10961096, 12991299, 14011401, 11381138, 11491149, 12231223, 10711071, 13991399, 14001400, 12421242, 13181318, 11011101, 10651065, 14281428, 12251225, 13501350, 13581358, 13121312Copy DataPrice of Refrigerators (in Dollars)Class Frequency Class Boundaries Midpoint Relative Frequency Cumulative Frequency1049–1118 1119–1188 1189–1258 1259–1328 1329–1398 1399–1468 Step 2 of 7 : Determine the frequency of the fifth class.

Answers

Answer:

3

Step-by-step explanation:

Given the data:

1405, 1121, 1339, 1096, 1299, 1401, 1138, 1149, 1223, 1071, 1399, 1400, 1242, 1318, 1101, 1065, 1428, 1225, 1350, 1358, 1312

Using the intervals:

Class interval ___ Frequency

1049–1118 ________ 4

1119–1188 ________ 3

1189–1258 ________3

1259–1328 _______ 3

1329–1398 _______ 3

1399–1468 _______ 5

From the table ; the fifth class is the interval :

1329 - 1398 and it has a frequency of 3

According to this map of railroads in 1890, what part of country were most
railways concentrated?

Answers

Answer:

In 1890, America's railroad linked mainly through the north and south rarely in the west if at all.

Need answers please offering 30 points

Answers

Answer:

yefeihuerijohiftv3ugrhoerfujfy

Step-by-step explanation:

the answer should be B 6+y<3

Need the answer plz.

Answers

3rd one btw I’m not right

factor the polynomial

-x5+36x3-22x2-147x-90

Answers

Answer:

-(x+6)(x+1)^2(x-3)(x-5)

Step-by-step explanation:

1,547,489 which digit is in the thousandsths place

Answers

Answer:

7

Step-by-step explanation:

Answer:

7

Step-by-step explanation:

Starting from right to left...

9 is in the ones place

8 is in the tenths place

4 is in the hundreds place

7 is in the thousands place.

I hope this helps!

The function f(x) is shown on the provided graph. Graph the result of the following transformation on f(x). f(x) +6

Answers

Answer:

Graph the same exact curve, but move every y value up 6.

Step-by-step explanation:

A transformation to the y-values is outside of the argument of the function. i.e., outside of the parentheses.

A girl has 9 skirts, 8 blouses, and 7 pairs of shoes. How many different skirt-blouse-shoe outfits can
she wear? (Assume that each item matches all the others, so she is willing to wear any combination.)

Answers

Answer:

She could wear 7 different outfits

One 8.3 ounce can of Red Bull contains energy in two forms: 27 grams of sugar and 80 milligrams of caffeine. One 23.5 ounce can of Jolt Cola contains 94 grams of sugar and 280 milligrams of caffeine. Determine the number of cans of each drink that when combined will contain 457 grams sugar and 1360 milligrams caffeine. We need cans of Red Bull, and cans of Jolt.

Answers

That’s a lot of Red Bull

Which expression is equivalent to this polynomial? 9x^2 + 4


A. (3x+2i)(3x-2i)

B. (3x+2)(3x-2)

C. (3x+2i)^2

D. (3x+2)^2

Answers

The answer is A (3x+2i)(3x-2i)

A company produces optical-fiber cable with a mean of 0.6 flaws per 100 feet. What is the probability that there will be exactly 4 flaws in 1000 feet of cable

Answers

Answer:

[tex]P(X = 4) =0.133[/tex]

Step-by-step explanation:

From the question we are told that:

Mean [tex]\x=0.6/100[/tex]

Flaws [tex]f=4[/tex]

Distance  [tex]d_2=1000ft[/tex]

Generally the equation for Poisson mean lambda over 1000 is mathematically given by

[tex]\lambda=0.6*1000/100[/tex]  

[tex]\lambda = 6[/tex]

Therefore

[tex]P(X = 4) = {e^-\lambda * \lambda^{\=x}} {{\=x}!}[/tex]

[tex]P(X = 4) =\frac{ e^{-6} * 6^4}{ 4!}[/tex]

[tex]P(X = 4) =0.133[/tex]

The perimeter of a collage basketball court is 96 meters and the length is 14 meters more than the width. What are the dimensions? HELP MEEEEE

Answers

Mark Brainliest please

Perimeter of a rectangle,

Pr = 2L+ 2W

L = (W + 14)

Pr = 2(W+14) + 2W

Pr= 2W + 28 +2W

Pr =96 = 4W + 28

Pr = (96 — 28) = 4W

Pr = 68 = 4W

W = 68/4 = 17m, L= 17+14 = 31m

Check:

17m+17m+31m+31m= 96m

Answer:

width = 17 m ; length = 31 m

Step-by-step explanation:

w = width

l = length

perimeter of a rectangle = (length + width) * 2

l = 14 + w

(14 + w + w) * 2 = 96

(14 + 2w) * 2 = 96

28 + 4w = 96

4w = 68

w = 17 m

l = 14 + 17 = 31 m

Two vectors m and n are defined by 3i+4j and n=2i-j. find the angle between m and n​

Answers

Answer:

[tex]{ \tt{m.n = |m| |n| \cos( \theta) }} \\ { \tt{ (3 \times 2) + (4 \times - 1) = (5)( \sqrt{5}) \cos( \theta) }} \\ { \tt{ \cos( \theta) = \frac{0.4}{ \sqrt{5} } }} \\ \theta = 79.7 \degree[/tex]

Ayúdenme con esta multiplicación de polinomio por favor

(2×+3y)(-4ײy-2×y²)

Answers

Answer: welcome to brainly

Step-by-step explanation:

Hello there! My name is agenthammerx, a Master Answerer and Engagement Team Member here on Brainly. I am here to welcome you to the site! Thank you for taking initiative to check out Brainly and for posting your first question! The Brainly Community welcomes you. If you have any questions regarding anything about the site, please don’t hesitate to reach out to me! I will try my best to help you and answer your question or check out our help center at https://faq.brainly.com/

Suppose 180 randomly selected people are surveyed to determine whether or not they plan on voting to reelect the current president. Of the 180 surveyed, 36 reported they will not vote to reelect the current president. Identify the values needed to calculate a confidence interval for the proportion that will not vote to reelect the current president at the 99% confidence level. Then find the confidence interval.

Answers

Answer:

(0.123 ; 0.277)

Step-by-step explanation:

Given :

Sample size, n = 180

x = 36

Proportion, p = x / n = 36/180 = 0.2

Confidence interval for sample proportion :

Confidence interval :

p ± Zcritical * √p(1 - p) / n

Zcritical at 99% = 2.576

0.2 ± 2.576 * √0.2(1 - 0.2) / 180

0.2 ± 2.576 * 0.0298142

0.2 ± 0.0768013792

(0.123 ; 0.277)

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