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3 years ago

please explain why you got the answer to the question, as i need to write it on paper or else i get a straight 0

Mathematics

1 answer:

adoni [48]3 years ago

7 0

Answer:

The answer is 1.2...

Step-by-step explanation:

If you look at the part y on the table and look at all of the points, you can see that every number increases by 1.2 points every single number. So, the constant proprotionally is 1.2

Hope this helps dude:)

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lyudmila [28]

The secong one...........:)

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3 years ago

Read 2 more answers

A company decided to test the hypothesis that the average time a company’s employees are spending to check their private e-mails

Degger [83]

Answer:

$z=\frac{6.6-6}{\frac{1.7}{\sqrt{40}}}=2.232$

Since is a one sided right tailed test the p value would be:

$p_v =P(z>2.232)=0.0128$

Step-by-step explanation:

Data given and notation

$\bar X=6.6$ represent the sample mean

$\sigma=1.7$ represent the population standard deviation

$n=40$ sample size

$\mu_o =6$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the true mean is higher than 6minutes or no, the system of hypothesis would be:

Null hypothesis: $\mu \leq 6$

Alternative hypothesis: $\mu > 6$

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$z=\frac{6.6-6}{\frac{1.7}{\sqrt{40}}}=2.232$

P-value

Since is a one sided right tailed test the p value would be:

$p_v =P(z>2.232)=0.0128$

5 0

3 years ago

Point X has coordinates (-4, -5) and point y has coordinates (--1, --5 ) which expression models the distance between points X a

sdas [7]

Answer: The last expression shows the result of 3 so it models the distance between x and y.

Step-by-step explanation:

First you will have to find the distance between the two points by square the x coordinates and squaring the y coordinates to find their sum .

-4 - (-1) = -3

-5 - ( -5) = 0

-3^2 + 0^2 = d^2 where d is the distance

9 = d^2

d= 3

The distance is 3 units

Now evaluate which expression have a solution as 3.

The last expression is the answer

the absolute value for -4 is 4 , and the absolute value for -1 is 1 and 4 minus 1 is 3.

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3 years ago

Help, dividing fractions.

e-lub [12.9K]

1. 3/5
2. 15
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3 years ago

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A cylindrical water tank is being filled with a hose. The depth of the water increases by 114 ft per hour. How many hours will i

Nimfa-mama [501]

2 hours and 14 min. 114 + 114 = 228. 312 - 228 = 84. 114 / 2 = 57. 84 - 57 = 27. 114 / 60 = 1.9. 27 / 1.9 = 14

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