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sertanlavr [38]
3 years ago
14

About 99.7% of sixth-grade students will have

Mathematics
2 answers:
attashe74 [19]3 years ago
6 0

Answer:

51.1

64.9

Step-by-step explanation:

Evgesh-ka [11]3 years ago
5 0

Answer: About 99.7% of sixth-grade students will have

heights between <u>51.1</u> inches and <u>64.9</u> inches.

Step-by-step explanation:

According to the empirical rule, 99.7% of data falls within the three standard deviations from the mean.

Given : Mean: \mu=58\text{ inches}

Standard deviation:=  \sigma=2.3\text{ inches}

Then, the  99.7% of sixth-grade students will have  heights between

\mu-3\sigma inches and \mu+3\sigma inches

i.e. 58-3(2.3) inches and 58+3(2.3) inches

i.e. 51.1 inches and 64.9 inches.

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VMariaS [17]

Answer:

The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

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:

323 blacks, 86% of blacks said that they would welcome a white person into their families. This means that n = 323, p = 0.86

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}} = 0.86 - 1.96\sqrt{\frac{0.86*0.14}{323}} = 0.8222

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.86 + 1.96\sqrt{\frac{0.86*0.14}{323}} = 0.8978

The 95% confidence interval for the percent of all black adults who would welcome a white person into their families is (0.8222, 0.8978).

5 0
3 years ago
4,792÷8 show your work​
Svetradugi [14.3K]

Answer:

<h2>4,792 ÷ 8 = 599</h2>

Step-by-step explanation:

Look at the picture.

Use the long division.

3 0
3 years ago
Kelly and Jessica have a total of 5 same-sized cookies. They want to divide them equally between the two of them. How much cooki
Paraphin [41]

Answer:

Each girl gets 2 1/2.

Step-by-step explanation:

5 is an odd number. If you take the 4 in it and split that in half then you have 2. Then take the extra 1 from the rest of 5 and split that in half.

2 1/2.

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Answer:

The direct consequences of poverty are well-known — limited access to food, water, health care or education are a few examples. However, the consequences of poor living conditions on the community are seldom discussed; indeed, if members of a community suffer from poor living conditions, then the entire community suffers.

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The stack on the left is made up of 15 pennies, and the stack on the right is also made up of 15 pennies. If the volume of the s
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