3 years ago

A group of 39 ladies is going to a

2 answers:

7 0

Answer:

Step-by-step explanation: 7 x 5 =35 so you will need one more to transport the remaining ladies which in this case is 4.

Hope This Helps:)

nadya68 [22]3 years ago

3 0

Answer:

6 jeeps are needed. the last jeep will fit 4 people because you cant logically cut a jeep in half to make it perfectly sized. In this case its 6 jeeps as your answer.

6x7=42

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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 =

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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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Step-by-step explanation:

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