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Luden [163]
3 years ago
9

a popular weekly magazine asserts that fewer than 40% of households in the united states have changed their lifestyles because o

f escalating gas prices. a recent survey of 180 households finds that 67 households have made lifestyle changes due to escalating gas prices.the standard error of p(bar) is:the value of the test statistic is:the pvalue is:at a=0.10 and using the p-valuein light of your conclusion, what test error may happen?
Mathematics
1 answer:
kiruha [24]3 years ago
8 0

Answer: The null hypothesis is not rejected.

Step-by-step explanation:

Since we have given that

n = 180

x = 67

So, \hat{p}=\dfrac{x}{n}=\dfrac{67}{180}=0.372

Hypothesis :

H_0:\hat{p}\geq 0.4\\\\H_1:\hat{p}

So, test statistic value would be

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\z=\dfrac{0.372-0.4}{\sqrt{\dfrac{0.4\times 0.6}{180}}}\\\\z=\dfrac{-0.027}{0.03645}\\\\z=-0.741

At 0.01 level of significance, z = -1.28

So, -1.28<-0.741

So, we will not reject the null hypothesis as p - value = 0.2234.

Hence, the null hypothesis is not rejected.

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Ordena de mayor a menor en los Ejercicios 9 a 12.
Dominik [7]

Answer:

We are required to order the numbers from greatest to least.

So, according to the options:

1. 9.129, 9.37, 9.3, 9.219

Since, the number of digits after the decimal place are not same, so we make them equal by adding 0 at the end. SO, we have,

9.129, 9.370, 9.300, 9.219

As, the ones place in each of the number is same, we look at the digit after the decimal.

Now, 9.370 and 9.300 have the same number after the decimal, so we look at the next number i.e 7 and 0 respectively.

As 7 > 0, so we get 9.370 > 9.300.

Hence, the order becomes 9.370, 9.300, 9.219, 9.129.

2. 0.012, 0.100, 0.001, 0.101

Again, as the ones place in each of the number is same, we look at the digit after the decimal.

Now, 0.101 and 0.100 have the same number till two places after the decimal, so we look at the next number i.e. 1 and 0 respectively.

As 1 > 0, so we have 0.101 > 0.100

Hence, the order becomes 0.101, 0.100, 0.012, 0.001.

3. 5.132, 5.123, 5.312, 5.231

Again, as the ones place in each of the number is same, we look at the digit after the decimal.

Now, 5.132 and 5.123 have the same number after the decimal, so we look at the next number i.e. 3 and 2 respectively.

As 3 > 2, so we get 5.132 > 5.123.

Hence, the order is 5.312, 5.231, 5.132, 5.123.

4. 62.905, 62.833, 62.950, 62.383

As the ones place in each of the number is same, we look at the digit after the decimal.

Now, 62.905 and 62.950 have the same number after the decimal, so we look at the next number i.e. 0 and 5 respectively.

As 5 > 0, so we get 62.950 > 62.905.

Hence, the order becomes 62.950, 62.905, 62.833, 62.383.

3 0
4 years ago
You created a scale drawing with the scale 1:8. The client asked you to change it to a scale of 1:10. Will your revised drawing
myrzilka [38]

Answer:

The revised drawing be larger or smaller than your original one

Step-by-step explanation:

The revised drawing be larger or smaller than your original one.

Because   a drawing at a scale of:

  • 1:10 means that the object is 10 times smaller than in real life scale 1:1
  • 1: 8 means that the object is 8 times smaller than in real life scale 1:1

So it means the revised drawing be larger or smaller than your original one

5 0
3 years ago
Read 2 more answers
Pls help algebra 2 below
olga_2 [115]

The answer is B. \frac{x(x+2)}{3y(2x+1)}

4 0
4 years ago
Free 50 points for the first two answer and ask me if you want brainliest!!<br>HAVE A NICE DAY​
Mashcka [7]

Answer:

can i have brainliest plz and thx so much have a great dayyyyy :)

Step-by-step explanation:

hop this helps :)

3 0
3 years ago
Read 2 more answers
a photograph has a perimeter of 24 in the difference between the photographs Lane and the width is 2 inches. find the length and
DaniilM [7]

L-w=5

L=w+5

P=2*(L+w)=24

L+w=24/2

L+w=12

w+5+w=12

2w+5=12

2w=12-5

2w=7

w=7/2

w=3.5

L=2+3.5

L=5.5

8 0
4 years ago
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