Help with question 17

Please help with clear explanation

Arlecino [84]

Answer:

102

Step-by-step explanation:

You can split that shape up into 2 rectangles to make it easier get the area of each rectangle and add them together.

Step 1

Identify the width and height

Step 2

Multiply the sides to get the answer

For example if we split the shape we will have 9,10 and 2,6

9 times 10 is 90

and 2 times 6 is 12

Add the 2 and get 102

Hopefully this helped.

8 0

3 years ago

What is the median of 74,83,79,62,65,73

Allisa [31]

Answer:

Step-by-step explanation:

Median: 73.5

4 0

3 years ago

Help me look at picture

hoa [83]

Answer:

113.04

Step-by-step explanation:

Our formula for this circle is 3.14x6^2(6x6) and our formula is 3.14xr^2 so it equals 113.04

5 0

3 years ago

9.) During the soccer season, Finn scored goals on 8% of the shots he

lidiya [134]

Answer:

500 shots

Step-by-step explanation:

the question is 8% of what number is 40?

we can use this proportion: is/of = %/100

let 'g' = number of goals

40/g = 8/100

cross-multiply to get:

8x = 4000

x = 500

8 0

2 years ago

A researcher is interested in religious differences for immigration checkpoint experiences at airports. Polling a sample of 340

vekshin1

Answer:

$z=\frac{0.52-0.46}{\sqrt{0.49(1-0.49)(\frac{1}{340}+\frac{1}{190})}}=1.325$

$p_v =2*P(Z>1.325)= 0.185$

Comparing the p value with the significance level given $\alpha=0.01$ 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't conclude that we have a significant difference between the two proportions of negative experiences at 1% of significance.

Step-by-step explanation:

Data given and notation

$n_{M}=340$ sample of Muslims

$n_{C}=190$ sample of Christians

$p_{M}=0.52$ represent the proportion of Muslims with negative experience

$p_{C}=0.46$ represent the proportion of christians with negative experience

z would represent the statistic (variable of interest)

$p_v$ represent the value for the test (variable of interest)

$\alpha=0.01$ significance level given

Concepts and formulas to use

We need to conduct a hypothesis in order to check if is there is a difference in the two proportions, the system of hypothesis would be:

Null hypothesis: $p_{M} - p_{C}=0$

Alternative hypothesis: $p_{M} - p_{C} \neq 0$

We need to apply a z test to compare proportions, and the statistic is given by:

$z=\frac{p_{M}-p_{C}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{M}}+\frac{1}{n_{C}})}}$ (1)

Where $\hat p=\frac{p_{M}+p_{C}}{2}=\frac{0.52+0.46}{2}=0.49$

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

Calculate the statistic

Replacing in formula (1) the values obtained we got this:

$z=\frac{0.52-0.46}{\sqrt{0.49(1-0.49)(\frac{1}{340}+\frac{1}{190})}}=1.325$

Statistical decision

Since is a two sided test the p value would be:

$p_v =2*P(Z>1.325)= 0.185$

Comparing the p value with the significance level given $\alpha=0.01$ 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't conclude that we have a significant difference between the two proportions of negative experiences at 1% of significance.

3 0

3 years ago