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-0.3n≤5.4<br> a n≤-18<br> b n≤-1.8<br> c n≥-1.8<br> d n≥-18

Usimov [2.4K]

Answer:-0.3n≤5.4

by WD Liu · 2008 · Cited by 77 — Let X1,...,Xn be a random sample from a p-dimensional population distribution. Assume that c1nα ≤ p ≤ c2nα for some positive constants c1,c2.

Step-by-step explanation:

8 0

2 years ago

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 380 babies were born, a

Alex Ar [27]

Answer:

The 99% confidence interval estimate of the percentage of girls born is (86.04%, 93.96%). Considering the actual percentage of girls born is close to 50%, the percentage increased considerably with this method, which means that it appears effective.

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 z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

In the study 380 babies were born, and 342 of them were girls.

This means that $n = 380, \pi = \frac{342}{380} = 0.9$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a p-value of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.9 - 2.575\sqrt{\frac{0.9*0.1}{380}} = 0.8604$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.9 + 2.575\sqrt{\frac{0.9*0.1}{380}} = 0.9396$

As percentages:

0.8604*100% = 86.04%.

0.9396*100% = 93.96%.

The 99% confidence interval estimate of the percentage of girls born is (86.04%, 93.96%). Considering the actual percentage of girls born is close to 50%, the percentage increased considerably with this method, which means that it appears effective.

4 0

3 years ago

The total of p,t and d

frosja888 [35]

Answer:

what does that mean

Step-by-step explanation:

6 0

3 years ago

Simplify (5x^3-x+14)-(3x^2-9x+4)

forsale [732]

5x^3 -3x^2 +8x +10 Combine all the like terms and multiply everything in the second parentheses by -1

I hope this help's you :)

7 0

4 years ago

Read 2 more answers

Which trigonometric ratio represents Cosine (cos)?

kotykmax [81]

If you want to remember the trig formulas, I suggest the “SOHCAHTOA” or the “Some old hippie caught another hippie tripping on acid method.” It combines all three principle formulas together. So, SOH means sine equals opposite over hypotenuse, and CAH means cosine equals adjacent over hypotenuse, and TOA means tangent equals opposite over adjacent.

Cosine equals adjacent/hypotenuse.

4 0

4 years ago