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worty [1.4K]
3 years ago
5

In prima zi de la lansarea noii cartii a scriitorului preferat al Elizei s-au vandut 24 de volume adica 6 _ 7

Mathematics
1 answer:
TiliK225 [7]3 years ago
3 0

Answer:

9

Step-by-step explanation:

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A manager of a grocery store wants to determine if consumers are spending
ololo11 [35]

Answer:

1. The error in the assumption is taking the sample mean, \bar x, as being equal to the population mean, μ

2. To correct the error, the manager will need to generate the confidence interval based on the population standard deviation on the acceptable values of the mean using the following relation;

CI=\bar{x}\pm z\frac{\sigma}{\sqrt{n}}

Step-by-step explanation:

We note that from the central limit theorem as the size of the sample, n, becomes more and more larger, the mean of the sample, \bar x, approaches that of the population mean, μ, therefore as the grocery store manager uses the sample mean as the population mean's point estimate an error will be observed based on the size of the sample compared to the population, where the difference between the two means (the population mean and the sample mean) is \left | \bar{x} - \mu \right |

1. The error in the assumption is taking the sample mean, \bar x, as being equal to the population mean, μ

2. To correct the error, the manager will need to generate the confidence interval based on the population standard deviation on the acceptable values of the mean using the following relation;

CI=\bar{x}\pm z\frac{\sigma}{\sqrt{n}}

Where:

σ = Population standard deviation = $30

z = z value at 95% confidence level = 1.96

\bar x = Sample mean $160

n = Sample size = 10

Plugging in the values, we have;

$141.4 < \bar x < $178.6

Hence the expected value of the mean should be between $141.4 and $178.6.

7 0
3 years ago
Degree measure of five thirds of a right angle
pychu [463]
150 degrees 
hope this helps 
6 0
3 years ago
Rewrite (2x+1)(x-2) using the distributive property then simplify
Contact [7]
(2x+1)(x-2) = 2x^2 - 4x +x -2= 2x^2-3x-2
3 0
3 years ago
Please help me with this
Masja [62]

Answer:

c = a - 16

Step-by-step explanation:

Given

a = b + 12 ( subtract 12 from both sides )

a - 12 = b

Substitute b = a - 12 into b = c + 4

a - 12 = c + 4 ( add 12 to both sides )

a = c + 16  ( subtract 16 from both sides )

c = a - 16

5 0
2 years ago
This is just in case you need help.....
Marta_Voda [28]
Yummmmmmmmmmmmmmmmmmmmmmmm
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3 years ago
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