3 years ago

WILL MARK BRAINLIEST!!

Mathematics

1 answer:

Paul [167]3 years ago

4 0

Answer:

Angelica's house is 11 miles away from the gas station.

Step-by-step explanation:

The most simple path from Angelica's house is 11 blocks away from the gas station and each unit/block is 1 mile. So 11 miles.

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If the population of a country grows at a rate of approximately 5 percent per year, the number of years required for the populat

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THe number of years would be 20 years.

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5. The box plot summarizes the test scores for 100 students: u 55 60 65 70 75 80 85 90 95 100 Which term best describes the shap

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2 years ago

The weights of 67 randomly selected axles were found to have a variance of 3.85. Construct the 80% confidence interval for the p

VLD [36.1K]

Answer:

$3.13$

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 67

Variance = 3.85

We have to find 80% confidence interval for the population variance of the weights.

Degree of freedom = 67 - 1 = 66

Level of significance = 0.2

Chi square critical value for lower tail =

$\chi^2_{1-\frac{\alpha}{2}}= 51.770$

Chi square critical value for upper tail =

$\chi^2_{\frac{\alpha}{2}}= 81.085$

80% confidence interval:

$\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}$

Putting values, we get,

$=\dfrac{(67-1)3.85}{81.085} < \sigma^2 < \dfrac{(67-1)3.85}{51.770}\\\\=3.13$

Thus, (3.13,4.91) is the required 80% confidence interval for the population variance of the weights.

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3 years ago

What is the area of the figure?

kap26 [50]

Answer:

3400

Step-by-step explanation:

60 * 70 = 4200

70 - 10 - 20 = 40

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4200 - 800 = 3400

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3 years ago

Read 2 more answers

Giving brainlest Help Please

iragen [17]

Answer:

1.6cm:

Step-by-step explanation:

1cm = 2m

2 divided by 1 = 2

3.2 divided by 2 =1.6

1.6cm

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2 years ago