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alekssr [168]
3 years ago
12

The probability of an operator entering alphanumeric data incorrectly into a field in a database is equally likely. The random v

ariable X is the number of fields on a data entry form with an error. The data entry form has 28 fields. Is X a discrete uniform random variable? Why or why not? (Please provide the mathematical details that lead to your answer.)
Mathematics
1 answer:
34kurt3 years ago
5 0

Answer:

Since P(0) and P(1) have not the same values for the probability, X is not a discrete uniform random variable.

Step-by-step explanation:

Probability of data to be correct: 0.5

Probability of data being incorrect: 0.5

The random variable X is the number of fields that have an error within the range of 28.

P(0) = 0.5^2^8

P(1) = ^2^8\text{C}_1 \times 0.5 \times 0.5^2^7 = 28 \times 0.5 ^2^8

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The dot plot represents a sampling of ACT scores:
Troyanec [42]

The data from a dot plot can be analyzed to find the five number summary, from which a box plot can be constructed

The correct option for the details of the box plot that represents the dot plot data is;

<em>Box plot </em><em>titled ACT Score with a minimum of </em><em>18</em><em>, quartile 1 of </em><em>21</em><em>, median of </em><em>22</em><em>, quartile 3 of </em><em>23</em><em>, and maximum of </em><em>25</em>

The process of deriving the five number summary of the box plot above is as follows;

Known:

The data from the dot plot can be expressed in increasing order for analysis of a box plot as follows;

18, 19, 19, 19, 21, 21, 21, 21, <u>22, 22</u>, 22,22, 23, 23, 23, 24, 24, 25

The number of data points in the statistics, n = 18

Unknown:

The five number summary

Method:

Finding the five number summary as follows;

The minimum value = 18

The maximum value = 25

  • The first quartile, inclusive of the median Q₁ = The middle number of the lower half {18, 19, 19, 19, 21, 21, 21, 21, <u>22}</u> = The (9 + 1)/2 th term

∴ Quartile 1 = Q₁ = 5th term = 21

  • The second quartile, Q₂ = The median (the middle number) = (22 + 22)/2 = 22 = Quartile 2

Quartile 2 = 22

  • The third quartile = The middle number of the upper half {<u>22</u>, 22,22, 23, 23, 23, 24, 24, 25} = Quartile 3 = 23

Quartile 3 = 23

Combining the above 5 number summary, the correct option for the box plot representing the dot plot data, is therefore;

Box plot titled ACT Score with a minimum of 18, quartile 1 of 21, median of 22, quartile 3 of 23, and maximum of 25

Learn more about box and whiskers, and dot plots here;

brainly.com/question/4002977

7 0
2 years ago
What is y after the following statement is executed? x = 0; y = (x &gt; 0) ? 10 : -10;?
Novosadov [1.4K]
Ahh, i can see youre doing some programming.  In C++ this output is -10
So -10
4 0
3 years ago
I NEED HELP PLEASE<br> Find the measure of ZD.
IgorLugansk [536]

Answer:

its 55 brooooooooooooooo

8 0
2 years ago
Can someone plz help Me?
hammer [34]

Answer:

A

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3 0
2 years ago
Read 2 more answers
28) Find the circumference of a circle with a diameter of 2.5 inches. (it = 3.14)
antoniya [11.8K]

Answer: Circumference = 7.85 inches

Concept:

Here, we need to know the idea of circumference.

The circumference is the perimeter of a circle. The perimeter is the curve length around any closed figure.

Circumference = 2πr

r = radius

π = constant

Solve:

<u>Given information</u>

r = (1/2) d = (1/2) (2.5) = 1.25 inches

π = 3.14

<u>Given formula</u>

Circumference = 2πr

<u>Substitute values into the formula</u>

Circumference = 2 · (3.14) · (1.25)

<u>Simplify by multiplication</u>

Circumference = (2.5) · (2.14)

Circumference = \boxed {7.85 inches}

Hope this helps!! :)

Please let me know if you have any questions

3 0
3 years ago
Read 2 more answers
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