Find the quotient in simplified 8/5 divided by 3/4

What is the answer to this queation for my maths homework<br> 3a+7=13

borishaifa [10]

3a+7=13
3a+7-7=13-7
3a=6
$\frac{3a}{3}$ = $\frac{6}{3}$
a=2

5 0

3 years ago

A college chemistry instructor thinks the use of embedded tutors will improve the success rate in introductory chemistry courses

jeka57 [31]

Answer:

$p_v = P(z>2.425) = 0.0076$

The p value is a value in order to reject or not the null hypothesis. If the p value is higher than the significance level we FAIL to reject the null hypothesis otherwise we have enough evidence to reject the null hypothesis.

Step-by-step explanation:

Data given and notation

n=100 represent the random sample taken

X=152 represent the people passed the exam

$\hat p = \frac{152}{200}= 0.76$ estimated proportion of people report having texted while driving

$p_o = 0.68$ 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)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the true proportion is higher than 0.68.:

Null hypothesis: $p \leq 0.68$

Alternative hypothesis: $p>0.68$

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:

$z=\frac{0.76 -0.68}{\sqrt{\frac{0.68(1-0.68)}{200}}}=2.425$

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 left right test the p value would be:

$p_v = P(z>2.425) = 0.0076$

The p value is a value in order to reject or not the null hypothesis. If the p value is higher than the significance level we FAIL to reject the null hypothesis otherwise we have enough evidence to reject the null hypothesis.

5 0

4 years ago

X + 4 = 6 . Solve for x .

LuckyWell [14K]

Answer:

x = 2

Step-by-step explanation:

x + 4 = 6

=> x = 6 - 4

=> x = 2

4 0

2 years ago

Read 2 more answers

there were 20 members in thr running club in september. the membership increased to 25 in october. the membership decreased back

OLga [1]

There was a decrease of 20% in membership from October to November.

Step-by-step explanation:

Step 1; To find the percent by which the running clubs membership decreased we must find the difference between the number of members in October and the number of members in November. The number of members in the club in October was 25 whereas it reduced to 20 in the month of November.

Difference in members = Number of members in October -Number of members in November = 25 - 20 = 5

Step 2; To find the percent decrease in number of members in the running club, we divide the difference in number of members by the number of members in November . We multiply this value by 100 to get it in terms of percentage.

Percent decrease in number of members =(Difference in members / number of members in November) *100

= (5/25) * 100 = 0.20 * 100 = 20%

So number of members in the club decreased by 20% from October to November.

4 0

4 years ago

Solve the equation. <br><br><br> 12=2+z/-6

Bogdan [553]

Answer:

$\boxed{\bold{z=-60}}$