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4 years ago

UT.15:02

Mathematics

2 answers:

Bingel [31]4 years ago

7 0

Answer:

What

Step-by-step explanation:

What assignment and grade is this? I could try to help!?

deff fn [24]4 years ago

4 0

Answer:

Look at the graph of the relationship. Count the number of units up and the number of units to the right one must move to arrive at the next point on the graph. Write these two numbers as a fraction.

Step-by-step explanation:

Unit rate is basically slope, and to find slope, you do rise (up or down) divided by run (right or left). Counting the number of units up and the number of units to the right you need to travel between points and then writing the two numbers as a fraction is how you find slope. Therefore, it is also how you find unit rate.

Slope explained:

Slope is a number (or fraction) you find to see how much a function changes for every unit. Simply put, it's how much you go up or down every time you go one unit to the right.

Ex. A slope of 2 would mean the graph of the relationship would go up 2 units for every 1 unit you went right.

You find slope by dividing how much the relationship goes up or down by how far you went right.

Ex. Went up 2 units and right 3 units. Since the relationship went up 2 units for every 3 units, then it must go up 2/3 for every one unit.

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An elementary school buys tickets for a field trip to the zoo. The number of children going on the field trip is 2 times the num

ioda

To answer the question, let x be the number of adults going to the zoo and 2x be the number of children. The total amount gained from the ticket sales should be,
1650 = 6x + 4(2x)
The values of x is equal to 117.86. Therefore, the school bought approximately 118 tickets for adults and 236 for children.

4 0

3 years ago

Alex is feeling stressed this morning. He did not get enough sleep because a dog barked most of the night. The dog barked from 1

inna [77]

Answer:

Poor Alex, I know how they feel, I got a dog myself.

The amount of time between

11:41 pm to 12:09 am is

19 minutes (to 12 am, 60 minutes to next hour) + 9

which is 28 minutes for the first dog barking session

the second time is 35 minutes,

using same method as before.

adding the two separte barking sessions we get

35+28= 63 minutes

which is equivelant to 1 hour and 3 minutes.

In conclusion the dog barks for 1 hour and 3 minutes in total.

7 0

2 years ago

Find the P-value for the indicated hypothesis test. An airline claims that the no-show rate for passengers booked on its flights

trapecia [35]

Answer:

$p_v =P(z$

B. 0.2061

Step-by-step explanation:

1) Data given and notation

n=380 represent the random sample taken

X=19 represent the no-shows in the sample

$\hat p=\frac{19}{380}=0.05$ estimated proportion of no-shows in the sample

$p_o=0.06$ is the value that we want to test

$\alpha$ represent the significance level

z would represent the statistic (variable of interest)

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

2) Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the no-show rate for passengers booked on its flights is less than 6%:

Null hypothesis: $p\geq 0.06$

Alternative hypothesis: $p < 0.06$

When we conduct a proportion test we need to use the z statistic, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

3) Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.05-0.06}{\sqrt{\frac{0.06(1-0.06)}{380}}}=-0.8208$

4) Statistical decision

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

The next step would be calculate the p value for this test.

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

$p_v =P(z$

So the p value obtained was a very high value and using the significance level for example $\alpha=0.05$ we have $p_v>\alpha$ so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of no-show rate for passengers booked on the company flights is nor significantly less than 0.06 or 6%.