pleaseee help I have no idea how to do this

Answer: a. Yes

              b. mean = 76.65

                  standard deviation = 10.04

              c. 76.65 ± 4.4

Step-by-step explanation:

a. Stem and leaf Plot shows the frequencies with which classes of value occur. To create this plot, we divide the set of numbers into 2 columns: stem, the left column, which contains the tens digits; leaf, the right column, which contains the unit digits.

Normal distribution is a type of distribution: it's a bell-shaped, symmetrical, unimodal distribution.

A stem and leaf plot displays the main features of the distribution. If turned on its side, we can see the shape of the data.

The figure below shows the stem and leaf plot of the 100-point test score. As we can see, when turned, the plot resembles bell-shaped distribution. So, this test scores were selected from a normal population.

b. Mean is the average number of a data set. It is calculated as the sum of all the data divided by the quantity the sample has:

mean = [tex]\frac{\Sigma x}{n}[/tex]

For the 100-point test score:

mean = [tex]\frac{71+93+91+...+65+75+84}{20}[/tex]

mean = 76.65

Standard Deviation determines how much the data is dispersed from the mean. It is calculated as:

[tex]s=\sqrt{\frac{\Sigma (x-mean)^{2}}{n-1} }[/tex]

For the 100-point test score:

[tex]s=\sqrt{\frac{[(71-76.65)+(93-76.65)+...+(84-76.65)]^{2}}{20-1} }[/tex]

s = 10.04

The mean and standard deviation of the scores are 76.65 and 10.04, respectively.

c. Confidence Interval is a range of values we are confident the real mean lies.

The calculations for the confidence interval is

mean ± [tex]z\frac{s}{\sqrt{n} }[/tex]

where

z is the z-score for the 95% confidence interval, which is equal 1.96

Calculating interval

76.65 ± [tex]1.96.\frac{10.04}{\sqrt{20} }[/tex]

76.65 ± 4.4

The 95% confidence interval for the average test score in the population of students is between 72.25 and 81.05.

Answer:

What’s the answer?!? Ok

Step-by-step explanation:

Answer:

60*

Step-by-step explanation:

because 180 -70 -50=60

Answer:

60°

Step-by-step explanation:

hmmmmmm oh yeah it is 60* I was honna wright 40° Lol

Answer:

3.75

Step-by-step explanation:

By Basic Proportionality Theorem:

[tex] \frac{6}{x} = \frac{8}{5} \\ \\ x = \frac{6 \times 5}{8} \\ \\ x = \frac{30}{8} \\ \\ x = 3.75[/tex]

Answer:

30 weeks

Step-by-step explanation:

Step-by-step explanation:

1 week -500

2 week -1kg

105-90

15

15 .2

30

there fore its take 30weeks to reduce his weight to 90kg

Answer:

Amount of salt = 500 milligrams

Step-by-step explanation:

Given:

Amount of salt = 0.5 g

Find:

Amount of salt in milligrams

Computation:

1 gram = 1,000 milligrams

So,

Amount of salt = 0.5 x 1,000

Amount of salt = 500 milligrams

Answer:

the answer is 27v- 2288/5

Answer:

primero sumas todas las calificaciones

posteriormente las divedes entre las materias que son y listo sacas su promedio

espero y te ayude

Answer:

1.15m/s

Step-by-step explanation:

Given data

m1=0.025 kg

m2= 2.35kg

u1= 217 m/s

v1= 109 m/s

u2= 0

v2=???

Applying the law of conservation of linear momentum

m1u1+m2u2=m1v1+m2v2

substitute

0.025*217+2.35*0= 0.025*109+2.35*v2

5.425= 2.725+ 2.35v2

5.425-2.725=2.35v2

2.7=2.35v2

divide both sides by 2.35

v2= 2.7/2.35

v2=1.15 m/s

Hence the speed of the watermelon will be 1.15m/s

Answer:

13.225 m

Step-by-step explanation:

Given that :

Initial Velocity, u = 4.9m/s

Acceleration due to gravity, a = - 9.8 m/s² (downward)

Distance, S = - 12

According to the motion equation :

S = ut + 0.5at²

S = 4.9t + 0.5(-9.8)t²

S = 4.9t - 4.9t² - - - (1)

At the highest point, v = 0

v² = u + at

0 = 4.9 + - 9.8t

-9.8t = - 4.9

t = 4.9/9.8

t = 0.5s

Put t = 0.5 in (1) above

S = 4.9(0.5) - 4.9(0.5)²

S = 2.45 - 1.225

S = 1.225 m

Total height :

(12 + 1.225) m = 13.225 m

Answer:

16in

Step-by-step explanation:

Most tiles a quadrilaterals meaning they have four sides, if it is 6in by 2 in, that means tou multiply both by two since there are two of each side length.

6 times 2 is 12

2 times 2 is 4

4 + 12= 16

Answer:

16 in

Step-by-step explanation:

Answer:

1. HL

2. ASA

3. AAS

4. SSS

Step-by-step explanation:

1. The hypotenuse and right angle of one triangle is congruent to the other triangle's hypotenuse and right angle, proving the hypotenuse-leg congruency theorem (HL).

2. The two angles and their included side (the side between the two angles) of a triangle match those of the other triangle, proving the angle-side-angle congruency theorem (ASA).

3. The measures of the side and the two adjacent angles of a triangle are given. They are congruent to the corresponding parts of the other triangle, proving the angle-angle-side congruency theorem (AAS).

4. All side lengths of one triangle are given, matching the corresponding sides of the other triangle. This proves the side-side-side congruency theorem (SSS).

I hope this helped!

Answer:

PERDON POR HACER ESTO

Step-by-step explanation:

NO ENTIENDO

ANSWER: I = 5

STEP BY STEP EXPLANATION:

HOPE THIS HELPS.

Answer:

A is a false equation broooo

Answer:

B, because 0.25 is EQUAL TO 1/4, not greater than

Step-by-step explanation:

A. 2/10 (or 1/5) is equal to 0.2 and 0.2 > 0.13 is correct

B. 1/4 is equal to 0.25, so 0.25 > 1/4 is incorrect

C. 1/6 is equal to 0.166666... and 0.125 < 0.1666 is correct

D. 2/3 is equal to 0.6666... and 0.15 < 2/3 is correct

Answer:

A

Step-by-step explanation:

The fact you need to use is 47%

47/100 * 47/100 = 2209 / 10000 = 0.221

Answer:

the answer is 3 miles

Step-by-step explanation:

1 +2 = 3 so 3

Answer:

A. 7%

Step-by-step explanation:

Given the following data;

Principal, P = $2,000

Time, T = 2 years

Simple Interest, I = $280

To find the simple interest rate, R?

Mathematically, simple interest is calculated using this formula;

[tex] S.I = \frac {PRT}{100} [/tex]

Where;

Substituting into the equation, we have;

[tex] 280 = \frac {2000*R*2}{100} [/tex]

Cross-multiplying, we have;

[tex] 280 * 100 = 4000*R[/tex]

[tex] 28000 = 4000R [/tex]

[tex] R = \frac {28000}{4000} [/tex]

Simple interest rate, R = 7%

Answer:

2

Step-by-step explanation:

( 282 - 14 ⋅ 3 ⋅ 6 ) / ( 6 ) - ( 21 - 18 )

= 30/( 6 ) - ( 21 - 18 )

= 30/( 6 ) - 3

[tex]=\frac{30}{6} -3[/tex]

= 2

Answer:

[tex]27[/tex]

Step-by-step explanation:

1) Simplify 14 × 3 to 42.

[tex]282 - 42 \times 6 - (21 - 18)[/tex]

2) Simplify 21 - 18 to 3.

[tex]282 - 42 \times 6 - 3[/tex]

3)Simplify 42 × 6 to 252.

[tex]282 - 252 - 3[/tex]

4) Simplify 282 - 252 to 30.

[tex]30 - 3[/tex]

5) Simplify.

[tex]27[/tex]

Therefor, the answer is 27.

Answer:

The answer is A

Step-by-step explanation:

Do on the first row, you see 1 tab of 5's

then on the left, you see 1 tab of 3's

So the answer is A!!!

Answer:

300 sqft

Step-by-step explanation:

30 times ten is 300 and the measure is feet squared

Answer:

9000 ft 3

Step-by-step explanation:

Answer:

ask the qustion better plz

Step-by-step explanation:

i don't know sorry

Answer:

A) Barnsboro Bank has more variation.

Step-by-step explanation:

Coefficient of Variation:

The coefficient of variation is given by the division of the standard deviation by the mean.

In this question:

The account balance with the highest coefficient of variation has more variation.

Barnsboro National Bank shows an average account balance of $315 with a standard deviation of $87.

So

[tex]cv = \frac{87}{315} = 0.2762[/tex]

Wellington Savings and Loan shows an average account balance of $8350 with a standard deviation of $1800.

So

[tex]cv = \frac{1800}{8350} = 0.2156[/tex]

Barnsboro Bank has the higher cv, so more variation, and the answer is given by option A.

Answer:

5x + y + 8 = 0

Step-by-step explanation:

53 sec hope this helps and meybe you could give me a brainlist?

Step-by-step explanation:

Answer:

8 Seconds

Step-by-step explanation:

0= -16t^2 + 1024

1024=16t^2

64=t^2

8= t

Answer:

Place one dot at (0,-2) and another point at (-1,-1) then draw a line through it. Then place a dot at (0,3) and (1,0) And draw a line through those two points. Wherever those two lines intercept will be your answer.

Step-by-step explanation:

Answer:

I think d. Sorry if I am wrong.

Step-by-step explanation:

Answer:

54

Step-by-step explanation:

Number of people in the meeting= 18

Out of this number 1/3 are from the club

Therefore the total number of club members can be calculated as follows

= 1/3 × x= 18

x = 18 × 3

= 54

Hence the number of people in the club is 54

Answer:

the answer is the 3rd one

Step-by-step explanation: