1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OLEGan [10]
3 years ago
11

The shade of marble tile is measured by the amount of light reflected by the tile measured on a scale of 0-255. A perfectly blac

k tile would reflect no light and a perfectly white tile would measure 255. A sample of nine Mezza Perla tiles were measured, with the following results: 204.999 206.149 202.102 207.048 203.496 206.343 203.496 206.676 205.831
(b) can you conclude that the mean shade of Mezza Perla tile (µ) is greater than 204.8?
Mathematics
1 answer:
Dafna11 [192]3 years ago
7 0

Answer:

Step-by-step explanation:

Sample data

204.999 206.149 202.102 207.048 203.496 206.343 203.496 206.676 205.831

N=9

Sum, Σx: 1846.14

Mean, μ: 205.12666666667

Variance, s^2:  2.6217475555555

Std dev = s = 1.619

The sample mean follows a t distribtion with df =8

Mean difference = 205.13-204.8 = 0.50

Std error = std dev/sqrt n = 0.540

Test statistic = Mean diff/se = 0.9259

p value = 0.1907 (one tailed at 95%)

Since p >0.05 we accept null hypothesis.

We cannot conclude that  the mean shade of Mezza Perla tile (µ) is greater than 204.8

You might be interested in
What is the range of this set of data?<br> 111.97, 63, 84, 100, 119,72
Reika [66]

Answer:

56

Step-by-step explanation:

The range of a data set is the difference between the largest and the smallest values in that data set. In this case, the largest value in the data set is 119, and the smallest is 63. 119-63=56, which is the range. Hope this helps!

3 0
3 years ago
Read 2 more answers
1. if the bearing of p from y is 048° what is the bearing of y from p .
Helen [10]

Answer:

See below and image

Step-by-step explanation:

180 + 48 = 228

180 + 55 = 235

5 0
1 year ago
PLEASE HELP WITH GEOMETRY WILL GIVE BRAINLIEST
sammy [17]

Answer:

Option D

Step-by-step explanation:

In the first three options we can evaluate the values of x with the help of Sine Rule for all the triangles

The Rule says

\frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c}

Where a , b and c are the sides opposite to the angles A, B and C of any ΔABC.

Hence , in order to determine unknown values of sides or angles , we need any 3 values from all 3 sides and 3 angles in a triangle. First Three options give us three values but the last option gives only 2.

Example

in first option we can apply Sine Rule as

\frac{\sin 84}{x}=\frac{\sin 63}{3}

\frac{0.994}{x}=\frac{0.891}{3}

x=\frac{0.991 \times 3}{0.891}

x=\frac{2.973}{0.891}

x=3.336

8 0
3 years ago
Kelsey graphed the equation y = 3x + 1 as shown below.
USPshnik [31]

Answer:

D. Kelsey graphed the slope as the y-intercept and the y-intercept as the slope.

Step-by-step explanation:

The equation to graph was : y= 3x + 1 where the slope is 3 and the y-intercept is 1

However, Kelsey graph line passes through points (-3, 0)and (0, 3).From these points the equation of the line is;

m=Δy/Δx  where

m=the slope of the graph

Δy= 3-0 =3

Δx= 0--3 =3

m=3/3 = 1

The equation of the line should be;

m=Δy/Δx

1=y-3/x-0

1x= y-3

3+1x= y

y= 1x + 3 ----------where the slope is 1 and y-intercept is 3

So you can see here that in the original equation,<em> the slope m is 3 and y-intercept is 1 as shown in the first attached graph.</em>

While in the Kelsey's graph, <em>the slope is 1 and the y-intercept is 3 as in the second attached graph. </em>

<em>Thus, the correct answer is D : Kelsey graphed </em><u><em>the slope,3</em></u><em> as the </em><em>y-intercept </em><em>and the</em><u><em> y-intercept,1,</em></u><em> as the slope. </em>

Answer choice A is incorrect because Kelsey didnot graph the y-intercept, 1 on the x-axis but graphed point (-3,0) on the x-axis.

Answer choice B is incorrect because on Kelsey's equation the y-intercept is 3 and not -3. i.e. y=1x + 3

Answer choice C is incorrect because Kelsey graphed the slope as up 1 right 1 which is okay per the equation , y=1x+3.However, this incorrect because the correct graph has a slope of 3.

4 0
3 years ago
Read 2 more answers
From the top of a 100-ft building a man
romanna [79]

Answer:

219m

Step-by-step explanation:

Since the man observes the car with angle 15 before observing in 33 degrees.

For the first observation

The angle observation gives an angle if 33 degrees with the horizontal.

It gives a triangle which I'll attach to the que,

from the first triangle

Tan 33 = 100/y

Y= 100/ tan 33

Y = 153.99m.

This is the distance from the building to the distance where it was secondly observed( 33).

To find x

tan 15 = 100/(153.99+x)

153.99 + x = 100/ tan 15

153.99 + x = 373.21

The distance between the two observed angles

X= 219m.

5 0
3 years ago
Other questions:
  • Container A is cylinder with a radius of 10 units and a height of 10 units. A right cone has been carved from its base and has a
    15·1 answer
  • Find the quotient.<br> 121.5 ÷ 9
    11·2 answers
  • All help is much appreciated please and thank you
    10·1 answer
  • F(x)=4(x+2)(x+2)-6 in standard form
    8·1 answer
  • Graph the linear function whose equation is<br> y - 2 = - * (x + 1) by following these steps:
    12·2 answers
  • Can someone please help me with this math question?
    13·1 answer
  • 3(6x - 4) = 22x
    13·1 answer
  • One half of a pie is cut into four equal pieces. What
    15·2 answers
  • September has come, and it is time to close the Pool.
    12·1 answer
  • Plzzzzz help 3 9/10 is the same as the sum of 3 1/3 and half of a number what is the number​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!