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tangare [24]
3 years ago
10

A lumber company is making boards that are 2638.0 millimeters tall. If the boards are too long they must be trimmed, and if the

boards are too short they cannot be used. A sample of 18 is made, and it is found that they have a mean of 2636.5 millimeters with a standard deviation of 12.0. A level of significance of 0.05 will be used to determine if the boards are either too long or too short. Assume the population distribution is approximately normal. Is there sufficient evidence to support the claim that the boards are either too long or too short
Mathematics
1 answer:
Anna [14]3 years ago
3 0

Answer:

The answer is "Fail to reject H_o, because  w_o is sufficient evidence for claim".

Step-by-step explanation:

H_0 \mu=2638.0  \ \ / \ \ H_a \mu \neq 2638.0 \\\\\mu < 2638.0  \ \ or \ \  \mu > 2638.0 \\\\\alpha =0.05  \ \ level \ \ at \ \ sufficient  \\\\

Test Statistic:

t =\frac{\bar{x}- \mu}{\frac{S}{\sqrt{n}}}\\\\=\frac{2636.5- 2638.0}{\frac{12.0}{\sqrt{18}}}\\\\= -0.5303\\\\

dt=17\\\\

p-value=0.6028  

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The ratio of girls to boys in jame’s chorus is 2 to 4. If there are 25 girls in her chorus, how many boys are there ?
Brilliant_brown [7]

Answer:

There are 50 boys

Step-by-step explanation:

girls to boys - 2:4

so 25x2=50

3 0
3 years ago
What is the domain and range? <br><br> {(-7,5), (-6,1), (-5,0), (-4,1)}
Monica [59]
The Domain is the first number of the pair
D= -7, -6, -5, -4
The Range is the second number of the pair
R= 5, 1, 0, when a number repeats like the number one you can put it once.


8 0
3 years ago
HELP ASAP DUE IN 20 MINUTES
IrinaK [193]

Answer:

x = 3

< D = 26

< E = 54

Step-by-step explanation:

I did the math

8 0
3 years ago
If y = 7x – 5, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs?
Setler79 [48]
The third set, (0, -5) (2,9) (-3,-26)
3 0
3 years ago
Read 2 more answers
Which graft represent -3x+5y=-15
azamat

The graph of the function -3x+5y=-15 is a linear function we can draw it by finding the values of y for every value of x.

<h3>What is a function?</h3>

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

We have a function:

-3x + 5y = -15

The above function shows a linear function we can write it as:

5y = 3x - 15

y = (3x - 15)/5

If x = 0, y = -3

x = 1, y = -2.4

x = 2, y = -1.8

x = -1, y = -3.6

x = -2, y = -4.2

Thus, the graph of the function -3x+5y=-15 is a linear function we can draw it by finding the values of y for every value of x.

Learn more about the function here:

brainly.com/question/5245372

#SPJ1

7 0
2 years ago
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