3 years ago

Select the correct answer.

Mathematics

1 answer:

Marrrta [24]3 years ago

8 0

Answer:

D makes an annuity. for annuity u have to make equal deposit regularly. so i think its D

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6=2*6/3+4

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Answer:

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Step-by-step explanation:

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3 years ago

25 8 10 20 30 35 5 40 45 what is the upper quartile of the data set

rusak2 [61]

Put the numbers in order
5, 8, 10, 20, 25, 30, 35, 40, 45

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3 years ago

In constructing 95% confidence interval estimate for the difference between the means of two normally distributed populations, w

Margaret [11]

Answer:

Option B.

Step-by-step explanation:

Given information:

$n_1=50, \overline{x}_1=756, s_1=35$

$n_2=50, \overline{x}_1=762, s_2=30$

We need to find 95% confidence interval estimate for the difference between the means of two normally distributed populations.

Formula for confidence interval:

$CI=(\overline{x}_1-\overline{x}_2)\pm z*\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}$

From the standard normal table it is clear that the z value at 95% confidence interval is 1.96.

Substitute the given values in the above formula.

$CI=\left(756-762\right)\pm 1.96\sqrt{\frac{35^{2}}{50}+\frac{30^{2}}{50}}$

$CI=\left(-6\right)\pm 1.96\sqrt{42.5}$

$CI=-6\pm 12.78$

$CI=(-18.78, 6.78)$

The lower confidence limit is −18.78.

Therefore, the correct option B.

8 0

3 years ago