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vredina [299]
2 years ago
12

HELP ASAP

Mathematics
1 answer:
dlinn [17]2 years ago
5 0
Y=mx+b
m=slope
b=yint

slope between (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)
given
(-1,3) and (2,-3)
slope=(-3-3)/(2-(-1))=(-6)/(2+1)=-6/3=-2

y=2x+b
find b
(-1,3) is a point
when x=-1, y=3
3=2(-1)+b
3=-2+b
add 2
5=b



y=2x+5
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Let us suppose we have data on the absorbency of paper towels that were produced by two different manufacturing processes. From
maksim [4K]

Answer:

The 95% CI for the difference of means is:

-155.45 \leq \mu_1-\mu_2 \leq -44.55

Step-by-step explanation:

<em>The question is incomplete:</em>

<em>"Find a 95% confidence interval on the difference of the towels mean absorbency produced by the two processes. Assumed that the standard deviations are estimated from the data. Round to two decimals places."</em>

Process 1:

- Sample size: 10

- Mean: 200

- S.D.: 15

Process 2:

- Sample size:  4

- Mean: 300

- S.D.: 50

The difference of the sample means is:

M_d=M_1-M_2=200-300=-100

The standard deviation can be estimated as:

\sigma_d=\sqrt{\frac{\sigma_1^2}{n_1}+\frac{\sigma_2^2}{n_2}}\\\\\sigma_d=\sqrt{\frac{15^2}{10}+\frac{50^2}{4}} =\sqrt{22.5+625}=\sqrt{647.5}=25.45

The degrees of freedom are:

df=n_1+n_2-2=10+4-2=12

The t-value for a 95% confidence interval and 12 degrees of freedom is t=±2.179.

Then, the confidence interval can be written as:

M_d-t\cdot \sigma_d\leq \mu_1-\mu_2 \leq M_d+t\cdot \sigma_d\\\\-100-2.179*25.45\leq \mu_1-\mu_2 \leq -100+2.179*25.45\\\\-100-55.45 \leq \mu_1-\mu_2 \leq -100+55.45\\\\ -155.45 \leq \mu_1-\mu_2 \leq -44.55

8 0
3 years ago
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2 years ago
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olga nikolaevna [1]

Answer yes 569

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3 years ago
Suppose a computer technical support representative can answer calls from 8 customers in an hour. What is the probability that a
Ganezh [65]

Answer:

Option d

Step-by-step explanation:

We need 2 fundamental data to solve this problem.

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But the time t in the formula is given in hours.

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We know that 1\ hour = 60 minutes.

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4 0
3 years ago
Read 2 more answers
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