Pls help me I’ll give brainlest

A line goes through the point (5,-7) and has a slope of m= -3. I need to know how to find the Y VALUE please explain the steps o

juin [17]

Well, don't you already have the t value ,-7.

3 0

3 years ago

Read 2 more answers

Help please i hv no clue how to do ths

Montano1993 [528]

D is the correct answer

7 0

3 years ago

Read 2 more answers

A random sample of 100 people was taken. Eighty-five of the people in the sample favored Candidate A. We are interested in deter

lbvjy [14]

Answer:

$z=\frac{0.85 -0.8}{\sqrt{\frac{0.8(1-0.8)}{100}}}=1.25$

$p_v =P(z>1.25)=0.106$

If we compare the p value obtained and the significance level given $\alpha=0.05$ we see that $p_v>\alpha$ 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 people who favored candidate A is not significalty higher than 0.8

ii) not significantly greater than 80%

Step-by-step explanation:

Data given and notation

n=100 represent the random sample taken

$\hat p=0.85$ estimated proportion of people who favored candidate A

$p_o=0.8$ is the value that we want to test

$\alpha=0.05$ represent the significance level

Confidence=95% or 0.95

z would represent the statistic (variable of interest)

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

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the true proportion is higher than 0.8.:

Null hypothesis: $p\leq 0.8$

Alternative hypothesis: $p > 0.8$

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:

$z=\frac{0.85 -0.8}{\sqrt{\frac{0.8(1-0.8)}{100}}}=1.25$

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 $\alpha=0.05$ . The next step would be calculate the p value for this test.

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

$p_v =P(z>1.25)=0.106$

If we compare the p value obtained and the significance level given $\alpha=0.05$ we see that $p_v>\alpha$ 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 people who favored candidate A is not significalty higher than 0.8

ii) not significantly greater than 80%

8 0

3 years ago

If NML ~ SRL find the value of x.

katen-ka-za [31]

Answer:

x = 5

Step-by-step explanation:

Since the triangles are similar, corrresponding sides are in proportion.

$\frac{NM}{SR} = \frac{ML}{RL} = \frac{NL}{SL}$

Using the equation formed by the second and third fraction above we get

$\frac{28}{24} = \frac{3x - 1}{x + 7}$

28(x + 7) = 24(3x - 1)

28x + 196 = 72x - 24

44x = 220

x = 5

7 0

3 years ago

rounded to the nearst dime, what is the greatest amount of money that rounds to $ 105.40 ? what is the least amount of money tha

hram777 [196]

Numbers with 5 or more in the cents place will round up to the next dime. Those with 4 or fewer cents will round down.

most that rounds to $105.40 is $105.44

least that rounds to $105.40 is $105.35

7 0

3 years ago