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kirza4 [7]
3 years ago
14

Explain what is meant when it is said that​ "data vary". How does the variability affect the results of statistical​ analysis?

Mathematics
1 answer:
topjm [15]3 years ago
8 0

Step-by-step explanation:

To say "data vary" means the component opinions change from person to person. Particularly for certain people, certain parameters can change over time. Since the data vary, two separate statistical analyzes of the same variable can result in different outcomes. Thus statistical analyses should take into account this possible variability and thus we can never be 100% sure about the results of the statistical analysis.

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The test scores of 32 students are listed below. Construct a boxplot for the data set and include the values of the 5-number sum
zhenek [66]

Answer:

Boxplot is constructed using quartiles and 5 No. summary means including minimum value of data, 1st quartile, 2nd quartile, 3rd quartile and maximum value of data.

As data already in increasing order, we find quartiles using the following formula,

value\:of\:K_{th}\:Quartile\:,\, Q_k=\:value\:of\:(\frac{k\times{(n+1)}}{4})\,\:th\,observation

where n = No. of Observations.

∴, 1st Quartile,

Q_1 = \frac{1\times{(32+1)}}{4}\, th\:\:observation\\\\ \:\:\:=8.25\,th\:observation\\\: \:\:= 8th\,+0.25(9th-8th)\\\:\:\:= 55 + 0.25(57-55)\\\:\:\:= 55.5

2nd Quartile,

Q_2 = \frac{2\times{(32+1)}}{4}\, th\:\:observation\\\\ \:\:\:=16.5\,th\:observation\\\: \:\:= 16th\,+0.5(17th-16th)\\\:\:\:= 69 + 0.5(70-69)\\\:\:\:= 69.5

3rd Quartile,

Q_3 = \frac{3\times{(32+1)}}{4}\, th\:\:observation\\\\ \:\:\:=24.75\,th\:observation\\\: \:\:= 24th\,+0.75(25th-24th)\\\:\:\:= 79 + 0.75(81-79)\\\:\:\:= 80.5

Minimum value of data = 32 & Maximum value of data = 99

So, Values of 5 no. that are to ne include in Boxplot are 32, 55.5, 69.5, 80.5, 99.

BoxPlot is attached with this ans.

7 0
2 years ago
What is <img src="https://tex.z-dn.net/?f=15%5E%7B2%7D" id="TexFormula1" title="15^{2}" alt="15^{2}" align="absmiddle" class="la
umka21 [38]

Amayo943,

Remember that with exponents you have to multiply the number of exponets by the same number it's in for example: 1^2 = 1 \times 1 In this case you need to know that:

  • 15^2 = 15 \times 15
  • 15 \times 15 = 225
  • =225

Therefore your answer is "225."

Hope this helps!

5 0
3 years ago
Help in class ez rly ez
KiRa [710]

Answer:

The slope is 4x

The y-intercept is -5

Slope-intercept form = y = 4x - 5

Step-by-step explanation:

I hope this helps.

8 0
2 years ago
Read 2 more answers
Hellp me on number 3 pls
Y_Kistochka [10]

Answer:

a. +150, b. -15 yards, c. -75 feet, d. +35 degrees, e. -$24.75

Step-by-step explanation:

You are just evaluating the (-) and (+) symbol based off the term being used. If they are gaining something its a (+) if its a loss in any way shape or form it is a (-)

4 0
2 years ago
Read 2 more answers
Can someone check my answer please HELP!
Bezzdna [24]
Let price of one scarf be $x 
Price of the other is 3 more than $x
 Therefore price of the other scarf =$x +3
 The total price she paid = $25.00
 That is, x+x+3=25
  2x+3=25
  2x=25-3
  2x=22
  x=22/2
  x=11
 The price of one scarf is $11 and the price of the other is 11+3=$14
 The price of the expensive scarf =$14.
6 0
3 years ago
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