I don't really understand part B of this homework problem

Answer:

the probability of a Type II error if in fact the mean waiting time u, is 9.8 minutes is 0.1251

Option A) is the correct answer.

Step-by-step explanation:

Given the data in the question;

we know that a type 11 error occur when a null hypothesis is false and we fail to reject it.

as in it in the question;

obtained mean is 9.8 which is obviously not equal to 8.3

But still we fail to reject the null hypothesis says mean is 8.3

Hence we have to find the probability of type 11 error

given that; it is right tailed and o.5, it corresponds to 1.645

so

z is equal to 1.645

z = (x-μ)/[tex]\frac{S}{\sqrt{n} }[/tex]

where our standard deviation s = 3.8

sample size n = 50

mean μ = 8.3

we substitute

1.645 = (x - 8.3)/[tex]\frac{3.8}{\sqrt{50} }[/tex]

1.645 = (x - 8.3) / 0.5374

0.884023 = x - 8.3

x = 0.884023 + 8.3

x = 9.18402

so, by general rule we will fail to reject the null hypothesis when we will get the z value less than 1.645

As we reject the null hypothesis for right tailed test when the obtained test statistics is greater than the critical value

so, we will fail to reject the null hypothesis as long as we get the sample mean less than 9.18402

Now, for mean 9.8 and standard deviation 3.8 and sample size 50

Z =  (9.18402 - 9.8)/[tex]\frac{3.8}{\sqrt{50} }[/tex]

Z = -0.61598 / 0.5374

Z = - 1.1462 ≈ - 1.15

from the z-score table;

P(z<-1.15) = 0.1251

Therefore, the probability of a Type II error if in fact the mean waiting time u, is 9.8 minutes is 0.1251

Option A) is the correct answer.

Answer:

B. f (x) = 2x + 2.5

Step-by-step explanation:

Linear function:

A linear function has the following format:

[tex]y = mx + b[/tex]

In which m is the value that y changes by when x increases by 1, and b is the flat fee.

A bowling alley has a one-time charge of $2.50 to rent a pair of shoes and a charge of $2.00 for each game bowled.

This means that [tex]m = 2, b = 2.50[/tex]

So

[tex]f(x) = 2x + 2.5[/tex]

And the correct answer is given by option b;

Step-by-step explanation:

iiiiii wiiish iit iis correeeeect

Answer:

Step-by-step explanation:

height = 14tan(24°)

area = 0.5(base)(height)

Find the angle that triples the height.

tanθ = 3×14tan(24°)

θ = arctan(3×14tan(24°)) ≅ 53.2°

The base angle will be 53.3 degrees when the area gets treble.

A triangle with two sides of equal length is an isosceles triangle.

The angles that have the base as one of their sides are called base angles.

[tex]Area = \frac{1}{2} bh[/tex]

Where,

b is the base of the triangle

h is the height of the triangle

According to the given question

We have,

Base angle of the isosceles triangle is 24 degrees.

Base of the isosceles triangle is 28 cm.

In triangle ABC

We have

BC = 28cm, BD = 14cm, AD = h and ∠ABD = 24 degrees

Now, in right angle triangle ABD

[tex]tan24 = \frac{h}{14}[/tex]

⇒ tan24 × 14 = h

Therefore,

Area of triangle ABC = [tex]\frac{1}{2}[/tex] × 28 × 14 × tan 24

Area of triangle ABC = 196tan24

Therefore, the base angles of an new  isosceles triangle when the area get treble is given but with the same base  by

Area of new isosceles  = 3× area of triangle ABC

⇒ [tex]\frac{1}{2}[/tex]× 28 × tanθ × 14 = 3×196tan24

⇒tanθ =  3 × 0.4452

⇒ tanθ = 1.3356

⇒ θ = [tex]tan^{-1}(1.34)[/tex]

⇒ θ = 53.3 degrees

Hence, the base angle will be 53.3 degrees when the area gets treble.

Learn more about isosceles triangle  and base angle here:

https://brainly.com/question/2456591

#SPJ2

Answer:

13/16

Step-by-step explanation:

First, write 1 3/13 as a fraction.

1 3/13 = 1 + 3/13 = 13/13 + 3/13 = 16/13

The reciprocal of 16/13 is 13/16.

Answer: 13/16

Answer:

This question doesn't have a solution

Step-by-step explanation:

Answer:

Functions:

3. The chart with arrows

4. The graph

Not Functions:

1. (1,1), (2,2), (3,3), (1,4)

2. (1,17), (0,16), (0,15), (-2,17)

Step-by-step explanation:

Functions do not have repeating domains (x-coordinates).

Hope it helps!

Answer:

Step-by-step explanation:

r = 6cm

so area = 6²π

Answer:

option 1

Step-by-step explanation:

Answer: 1st one

Step-by-step explanation:

Answer:

x=18°

hope it helps.......

Answer:

x=15 degrees

hope it helps you

Answer:

90.335

Step-by-step explanation:

Answer:

The answer is B

Step-by-step explanation:

B

Answer:

65

Step-by-step explanation:

if they are similar their sides are in proportion and so are the corresponding medians

to see their corresponding sides line up the names of the triangles

N  Q  Z

⇵⇵⇵

C  B  K

BK / QZ = 45/27 ; substitute whit what you see in the picture

(4x+1) / (2x+7)  = 45/27 ; cross multiply

27( 4x+1) = 45( 2x+7) ; distribute

108x + 27 = 90 x + 315; subtract 90x and 27 from both sides

108x -90x = 315 -27; combine like terms

18x = 288; divide both sides by 18

x=16

BK = 4* 16 +1 = 65

Answer:

From this question, we can write

Let n be the number.

9n=3n+30

6n=30

n=5

We find that the number is 30.

Hi there!

it would be 10.. if your asking for what multiply by 9 and 3 more than the number.

1.Find common multiply:

[tex]9,18,27,36,45,54,63,72,81,90,99[/tex]

[tex]30,60,90,120[/tex]

2.Find what nine can multiply to and 30 can also:

[tex]=90[/tex]

3.Divide two terms:

[tex]90*9=10[/tex]

This means, the number would be 10.

Answer:

yes

Step-by-step explanation:

Answer:

yes

Step-by-step explanation:

Answer:

x 37 y 30

Step-by-step explanation:

hopes it helps yo

Answer:

10^12

Step-by-step explanation:

Add the exponents when you multiply numbers with exponents

Answer:

3x+11 = 65, so x will equal 18

Answer:

23

Step-by-step explanation:

18 19 21 25 27 28

19 21 25 27

21 25

21+25= 46

46/2= 23

Answer:

23

Step-by-step explanation:

Step-by-step explanation:

AB = 3

by similaritiy criterion

CE/ CB= ED/AB

4/6= 2/AB

AB = 3

plz mark my answer as brainlist plzzzz also vote me ..if you find it useful.

Answer:

The answer is pi and the estimate is 3.14

Step-by-step explanation:

Just took the test for plato and Edmentum users only

The estimated value of the expression is π which is approximately equal to the number 3.14.

Simplification is to make something easier to do or understand and to make something less complicated.

The expression is given below.

[tex]\Rightarrow \dfrac{5\sqrt2 \pi - 4\sqrt2 \pi}{\sqrt2}[/tex]

Taking √2and π common, then we have

[tex]\rightarrow \dfrac{(5 - 4)\sqrt2 \pi}{\sqrt2}\\\\\\\rightarrow \dfrac{\sqrt2 \pi}{\sqrt2}\\\\\\\rightarrow \pi \approx 3.14[/tex]

The value of the expression is 3.14.

More about the simplification link is given below.

https://brainly.com/question/12616840

#SPJ2

Answer:

no solution

Step-by-step explanation:

2(4x - 2) = 8(x - 7)

8x - 4 = 8x - 56

0x = -52

no solution

Answer:

2(4x-2) = 8(x-7)

Distribute on both sides

2(4x)-2(2) = 8(x)-(7)(8)

Simplify

8x - 4 = 8x - 56

Subtract 8x from both sides to balance the equation.

-4 = -56

This is not equal.

Therefore the answer is no solution

Answer:

9²

Step-by-step explanation:

9³ × 9⁻¹ = 9³⁻¹ = 9²

Answer:

[tex] {9}^{ - 3} \times {9}^{ - 1} = {9}^{( - 3 - 1)} = {9}^{ - 4} =\boxed{\frac{1}{ {9}^{4} }}✓ \\ [/tex]

Answer:

m = 7

Step-by-step explanation:

1.2m = 8.4

m is being multiplied by 1.2

to get m alone, we do the inverse operation to multiplication which is division.

Divide both sides by 1.2

1.2m/1.2 = 8.4/1.2

m = 7

Answer:

m=7

Step-by-step explanation:

8.4/1.2=7

Answer:

-8u-16=-6u+30

-8u+6u=30+16

-2u=46

u=-46/2

u=-23

Step-by-step explanation:

Answer:

7

Step-by-step explanation:

First multiply 6 by u and 7 to get 6u+7

next add  -8u + 6u and get -2u

then subtract 42 from both sides of the equation (28-42)

finally divide -2u from both sides of the equation and get 7

Answer:

$1020

Step-by-step explanation:

0.155x1200

1200-180=

1020