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Harman [31]
2 years ago
11

Please help me with this question

Mathematics
1 answer:
lbvjy [14]2 years ago
5 0
Lisa because Ty is typing in between a minute and 120 seconds
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The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e
Viefleur [7K]

Answer:

The 95% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.2087, 0.2507).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

Suppose a sample of 1537 tenth graders is drawn. Of the students sampled, 1184 read above the eighth grade level. So 1537 - 1184 = 353 read at or below this level. Then

n = 1537, \pi = \frac{353}{1537} = 0.2297

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2297 - 1.96\sqrt{\frac{0.2297*0.7703}{1537}} = 0.2087

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2297 + 1.96\sqrt{\frac{0.2297*0.7703}{1537}} = 0.2507

The 95% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.2087, 0.2507).

7 0
3 years ago
Please help me and are u supposed to divide 1056 by 24
insens350 [35]

1056/24

=44

Hope this helps!

Thanks!

-Charlie

6 0
3 years ago
Read 2 more answers
One day, the Early Bird Restaurant used
stiks02 [169]

Answer:

F. 23

Step-by-step explanation:

15/2 = 7.5

7.5 dozen eggs per 100 customers

15 + 7.5 = 22.5 which can be rounded to 23

= 23

3 0
2 years ago
Write two different pairs of decimals whose sums are 14.1 and one pair should involve regrouping
mr Goodwill [35]
<span>two pairs of decimals that add up to 14.1 would be 8.4 and 5.7</span>
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A Markov chain has 3 possible states: 1, 2, and 3. Every hour, it makes a transition to a different state. From state 1, transit
Alisiya [41]

Answer:

Please see attachment

Step-by-step explanation:

Please see attachment

4 0
2 years ago
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