Using the order of operations, what would be the first step:<br><br> 4−8÷1−3[3+(7−5)2]

Can you table y=x+4 for me?

Jet001 [13]

Answer:

Step-by-step explanation:

4 0

3 years ago

A running track at a school is shaped like oval. The track is 1/2 miles long . Mr. Perez puts a marker down every 1/8 mile .

Lunna [17]

Answer:

4 markers

Step-by-step explanation:

1/2 miles divided by 1/8 miles equals 4 markers.

1/2 ÷ 1/8

Apply the fraction rule:

1/2 × 8/1

Cross cancel common factor 2:

= 4/1

= 4

Hope this helps!

4 0

3 years ago

In a survey, 32% of the respondents stated that they talk to their pets on the telephone. A veterinarian believed this result

adoni [48]

Answer:

$z=\frac{0.29 -0.32}{\sqrt{\frac{0.32(1-0.32)}{210}}}=-0.932$

$p_v =P(z$

So the p value obtained was a very high value and using the significance level given $\alpha=0.05$ 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 pet owners contacted by telephone is NOT significantly lower than 0.32

Step-by-step explanation:

Data given and notation

n=210 represent the random sample taken

X=61 represent the number of pet owners contacted by telephone

$\hat p=\frac{61}{210}=0.29$ estimated proportion of pet owners contacted by telephone

$p_o=0.32$ 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 proportions is lower than 0.32.:

Null hypothesis: $p \geq 0.32$

Alternative hypothesis: $p < 0.32$

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:

$z=\frac{0.29 -0.32}{\sqrt{\frac{0.32(1-0.32)}{210}}}=-0.932$

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 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 given $\alpha=0.05$ 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 pet owners contacted by telephone is NOT significantly lower than 0.32

3 0

3 years ago

Factor the expression 4d + 12 your answer in the boxes to complete the factored expression. blank (d+blank) fill in the blank

kupik [55]

4(d + 3) take out the GCF of 4

3 0

3 years ago

Are 10x -3+ 2x -5 and 4(3x-2) equivalent

NikAS [45]

Simplify the first one
12x-8
Simplify the second one
12x-8
They're the same

7 0

4 years ago

Read 2 more answers

Using the order of operations, what would be the first step: 4−8÷1−3[3+(7−5)2]