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dsp73
4 years ago
11

The standard deviation of is usually called the A. randomized standard error B. standard error of the population C. standard err

or of the sample D. standard error of the mean
Mathematics
1 answer:
faust18 [17]4 years ago
8 0

Answer:

The correct answer is option 'D': Standard error of the mean.

Step-by-step explanation:

If we carry out observations that are random in nature the mean of the data is the average value which gives us an idea about the value about which the data is spread about.

The standard deviation gives us the distribution of the data around the mean thus data with a low standard deviation means that the data point's are closer to mean. A larger value of standard deviation means that the data is highly discrete or we can say that the variations in the data points is large.

the concept of standard deviation is highly useful while carrying out results of measured observations as it gives us a estimate of the standard error of the mean.

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3 years ago
Which is the graph of y = ⌊x⌋ – 2?
Alexandra [31]

Answer:

The third graph

Step-by-step explanation:

The Greatest Integer function (also called "floor" function. is in fact the one depicted on your first graph on the left. It indicates the integer part of the real number x.

So, if one translates such function two units down , as requested by the subtraction of 2 of the function y the problem shows, one ends up with the third graph depicted on the page.

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4 years ago
Your teacher gives you a number cube with numbers 1-6 on its faces. You are asked to state a theoretical probability model for r
butalik [34]

The missing part of the question is show in bold format.

Your teacher gives you a number cube with numbers 1-6 on its faces. You are asked to state a theoretical probability model for rolling it

once. Your probability model shows a probable outcome of 1/6 for each of the numbers on the cube, 1 chance for all any of the 6 numbers.

You roll it 500 times and get the following data:

Outcome 1 2 3 4 5 6

Frequency 77 92 75 90 76 90

Exercises 1–2

1. If the equality model was correct, about how many of each outcome

would you expect to see if the cube is rolled 500 times

2. Based on the data from the 500 rolls, how often were odd numbers observed? How often were even numbers observed?

Answer:

Step-by-step explanation:

1.

If the equally likely model was correct,  about how many of each outcome

would you expect to see if the cube is rolled 500 times.

The probability of rolling any of the numbers from 1 to 6 is  p(1/6)

The number of each of the outcomes expected to be seen in 500 rolls of the number cube is np

= 500 * \frac{1}{6}  \\ \\ = \frac{500}{6} \\ \\  = 83.333 \\ \\ \approx 83

2.  From the given data in the roll;

The odd numbers 1, 3 and 5, were obtained at  77, 75 and 76 times respectively.

Thus, the total number of times odd number were rolled = 77 + 75 + 76 = 228

Probability of an odd number turning up = \frac{ number \ of  \ required  \ outcome}{ total \  number  \ of  \ possible \ outcome}

= \frac{228}{500}

= 0.456

= 45.6%

The even numbers, 2, 4 and 6, were obtained 92, 90 and 90 times respectively.

The total number of times even number were rolled = 92 + 90 + 90 = 272

Probability of an even number turning up  = \frac{ number \ of  \ required  \ outcome}{ total \  number  \ of  \ possible \ outcome}

= \frac{272}{500}

= 0.544

= 54.4%

4 0
3 years ago
Which expressions are equivalent to −90−60w?
Kipish [7]

Answer:

a, b and e

Step-by-step explanation:

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3 years ago
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ki77a [65]

Step-by-step explanation:

<h2>13. </h2>

\implies\sf{ {x}^{2} = 144 } \\  \\  \implies\sf{ x =  \pm \sqrt{144} }   \\  \\ \implies\sf{ x =  \pm 12 }

<h2>14.</h2>

\implies\sf{ {x}^{2} =  \dfrac{25}{289}  } \\  \\  \implies\sf{ x =  \pm \sqrt{ \frac{25}{289} } }   \\  \\ \implies\sf{ x =  \pm  \frac{5}{17}  }

<h2>15.</h2>

\implies\sf{ {x}^{3} = 216 } \\  \\  \implies\sf{ x =   \sqrt[3]{216}  }   \\  \\ \implies\sf{ x =  6 }

4 0
3 years ago
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