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sleet_krkn [62]
3 years ago
7

Please some help me!!!

Mathematics
1 answer:
DiKsa [7]3 years ago
6 0
The mistake that was made is that she should of multiplied the fractions by the exponents first 
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A simple random sample of size n is drawn from a normally distributed population, and the mean of the sample is (x with a line o
prohojiy [21]

Answer:

Last option

{\displaystyle {\overline {x}}} \± \frac{2.58*s}{\sqrt{n}}

Step-by-step explanation:

{\displaystyle {\overline {x}}}

If we extract a sample of size n from a normal population and we want to estimate the population mean then the confidence interval for the mean will be:

{\displaystyle {\overline {x}}} \± Z_{\alpha/ 2}*\frac{s}{\sqrt{n}}

Where

Where {\displaystyle {\overline {x}}}  is an estimator for the mean μ.

n is the sample size and s is its standard deviation.

\alpha is the level of significance

\alpha= 1-Confidence Level

\alpha= 1-0.99

\alpha = 0.01

Then Z_{\frac{\alpha}{2}} = Z_{\frac{0.01}{2}} = Z_{0.005}=2.58

Then the 99% confidence interval for the population mean is

{\displaystyle {\overline {x}}} \± \frac{2.58*s}{\sqrt{n}}

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4 years ago
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grandymaker [24]
2 because the others aren’t factors of both
6 0
3 years ago
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Find the area and perimeter of the triangle in the picture. (the missing unit is 8.5 if you need that to solve)
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Is negative 2 n 13/16 greater, or less than or equal to negative 2 11/14???
Kazeer [188]
-2 \frac{13}{16} \ \textless \  -2\frac{11}{14}
8 0
3 years ago
Need help with both…
OLEGan [10]

Answer:

1. 0.00148

0.004 x 0.37 = 0.00148

2. 5

The number of marbles in each bag is the greatest common factor of 75 and 60. To find the greatest common factor, I used the prime factorization of the numbers to find the product of the common prime factors: 75 = 3 x 5 x 5and 60= 2 x 2 x 3 x 5, so the GCF is 3 x 5 = 15. Since each bag contains 15 marbles and there are 75 green marbles, there will be 75 / 15 x 5 bags of green marbles.

Step-by-step explanation:

7 0
3 years ago
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