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2 years ago

The answers to the 3 questions

Mathematics

1 answer:

Simora [160]2 years ago

3 0

It is linear as the equation performs ax+by +c
y = 90.2x - 177670
number of student to enroll 2011 is 3722

Step-by-step explanation:

Linear is a straight line.
Quadratic is a square which generates parabola.
Quadratic formula is (ax)^2 + bx + c = 0.
Linear formula is ax+bx + c = 0
To forecast time series data modelling can be used.
To form a linear equation y = mx + c.
After finding x is the required value , m is the intercept and C constant.
X axis have years and Y axis has the value.
to find number of students x is 90.2 * 2011 - 177670.
The result comes to 3722.
In Data analysis predictive modeling is the second phase.
It is important because it helps in associating to variables.

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Can you please multiply this<br> (–2.3)(6.5)

liubo4ka [24]

Hello There!

-2.3 x 6.5 = -14.95.

The answer is -14.95.

Hope This Helps You!
Good Luck :)

- Hannah ❤

3 0

3 years ago

Read 2 more answers

Given a list of candy in a field called Item and prices called Price on an empty PivotTable, how would you find out how many of

SIZIF [17.4K]

Answer:

Drag Item to both the VALUES and the ROWS area

Step-by-step explanation:

To find out how many of each type of candy you have; Drag Item to both the VALUES and the ROWS area

4 0

2 years ago

Help pls!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

postnew [5]

Answer?

What do you need help with? :)

5 0

2 years ago

Ten years ago 53% of American families owned stocks or stock funds. Sample data collected by the Investment Company Institute in

Alborosie

Answer:

a) Null hypothesis: $p\geq 0.53$

Alternative hypothesis: $p < 0.53$

b) $z=\frac{0.46 -0.53}{\sqrt{\frac{0.53(1-0.53)}{300}}}=-2.429$

$p_v =P(Z$

c) So the p value obtained was a very low value and using the significance level given $\alpha=0.01$ we have $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 1% of significance the proportion of American families owning stocks or stock funds is significantly less than 0.53 .

Step-by-step explanation:

Data given and notation

n=300 represent the random sample taken

$\hat p=0.46$ estimated proportion of American families owning stocks or stock funds

$p_o=0.53$ is the value that we want to test

$\alpha=0.01$ represent the significance level

Confidence=99% or 0.99

z would represent the statistic (variable of interest)

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

Concepts and formulas to use

Part a

We need to conduct a hypothesis in order to test the claim that proportion is less than 0.53 or 53%.:

Null hypothesis: $p\geq 0.53$

Alternative hypothesis: $p < 0.53$

Part b

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 $p_o$ .

Calculate the statistic

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

$z=\frac{0.46 -0.53}{\sqrt{\frac{0.53(1-0.53)}{300}}}=-2.429$

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 significance level provided $\alpha=0.01$ . The next step would be calculate the p value for this test.

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

$p_v =P(Z$

Part c

So the p value obtained was a very low value and using the significance level given $\alpha=0.01$ we have $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 1% of significance the proportion of American families owning stocks or stock funds is significantly less than 0.53 .

7 0

2 years ago

What is the slope of a line that contains the points(-13,8) and (-2,-1)

anygoal [31]

Answer:

slope = -(9/11)

Step-by-step explanation:

$slope=\frac{-1-8}{-2-(-13)} =\frac{-9}{-2+13} =-\frac{9}{11}$

I hope this help you

7 0

1 year ago