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Elenna [48]
3 years ago
5

On a trip to Sacramento, Shawna traveled 400 miles in 8 hours. The next time she made the same trip, it took 10 hours. How much

faster was her average speed on her first trip?
Mathematics
1 answer:
Leona [35]3 years ago
5 0
On her first trip, she went 50 miles per hour.  On the second trip, she went 40 miles per hour.  Meaning her speed was 10 miles per hour faster on the first trip than it was on the second.
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5 1/4 divided by 1/8
svetlana [45]

Answer:

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Step-by-step explanation:

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Several years​ ago, 43​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students r
Ne4ueva [31]
<h2><u>Answer with explanation</u>:</h2>

Let p be the population proportion of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive.

Set of hypothesis :

H_0: p=0.43\\\\ H_a:p\neq0.43

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n= sample size

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and z_c is the two-tailed z-value for confidence level (c).

As per given ,

Sample size of parents : n= 1085

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Critical value for 90​% confidence interval : z_c=1.645  ( by z-value table)

Now, the  90​% confidence interval :

0.429\pm (1.645)\sqrt{\dfrac{0.429(1-0.429)}{1085}}\\\\=0.429\pm 0.0247\\\\=(0.429-0.0247,\ 0.429+0.0247)\\\\=(0.4043,\ 0.4537)

Thus , the 90​% confidence interval: (0.4043, 0.4537).

Since 0.43 lies in 90​% confidence interval , it means we do not  have enough evidence to reject the null hypothesis .

i.e. We are have no evidence that parents' attitudes toward the quality of education have changed.

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Hope this helped! Let me know if there is anything else I can do!

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butter bts

the only explanation for this world

cuz i've got that superstar glow so eohohohwoow

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