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snow_tiger [21]
3 years ago
14

A group of students wanted to investigate the claim that the average number of text messages sent yesterday by

Mathematics
1 answer:
Likurg_2 [28]3 years ago
7 0
First we need to write the null and alternate hypothesis for this case.

Let x be the average number of text message sent. Then

Null hypothesis: x = 100
Alternate hypothesis: x > 100

The p value is 0.0853

If p value > significance level, then the null hypothesis is not rejected. If p value < significance level, then the null hypothesis is rejected.

If significance level is 10%(0.10), the p value will be less than 0.10 and we reject the null hypothesis and CAN conclude that:
The mean number of text messages sent yesterday was greater than 100.

If significance level is 5%(0.05), the p value will be greater than 0.05 and we cannot reject the null hypothesis and CANNOT conclude that:
The mean number of text messages sent yesterday was greater than 100.
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adell [148]
If I'm thinking correct it would say 5 120. HOPE I HELPED>
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3 years ago
What is two over twelve + four over nine
noname [10]

Answer:

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Step-by-step explanation:

2/12+4/9

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3 years ago
given the vector with a manitude of 9m at an angle a of -80 degrees, decompose this vector into two vector components oarallel t
lana [24]

Answer:

We have the magnitude, M, and the angle A.

(The angle is always measured from the +x-axis)

Then we have that:

x = M*cos(A)

y = M*sin(A)

in this case:

M = 9m

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x = 9m*cos(-80°) = 1.562

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Now, the component parallel to the x axis is:

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And the slope of something parallel to the x-axis is always zero, as this is a constant line.

3 0
3 years ago
10090 7 Each railroad car in a train set is 6 inches in length. The railroad track is 5 feet long. How many railroad cars can it
Orlov [11]

Step-by-step explanation:
Given,
Length of railroad car = 6 inches
The length of railroad track = 5 feet
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5 feet = 12*5 = 60 inches
Let,
x be the number of cars.
Number of cars * Length of each car = Length of track

Dividing both sides by 6

10 cars can fit on railroad track.
8 0
3 years ago
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Hello can someone please help me with this.
otez555 [7]

Answer:

a)

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