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nydimaria [60]
3 years ago
14

The table below gives probabilities for various combinations of events A, B, and their complements. Probability of being in each

cell of a two-way table . A not A B 0.4 0.2 not B 0.3 0.1 Find P(A). Enter the exact answer. P(A)= Enter your answer in accordance to the question statement

Mathematics
1 answer:
k0ka [10]3 years ago
7 0

Answer:

The required answer is attached below

Step-by-step explanation:

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Y=0.30x+65

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Please please help <br> What is the dependent variable?<br> A) height<br> B )armspan
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In the expression 3x² + y − 5, which of the following choices is the exponent in the term 3x²?
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Step-by-step explanation:

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7 0
3 years ago
Considering the number of questions incorrect from classmates on a quiz {10, 11, 12, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19,
IrinaK [193]

Answer:

According to the Empirical Rule, 68% of the data should fall between 11.98 and 18.02

Step-by-step explanation:

We are given the following data in the question:

10, 11, 12, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19, 20

Formula:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{225}{15} = 15

Sum of squares of differences = 25 + 16 + 9 + 4 + 4+ 4 + 1 + 0+ 1+ 1 + 4 + 9 + 9+ 16 + 25 = 128

S.D = \sqrt{\dfrac{128}{14}} = 3.02

Empirical rule:

  • According to this rule almost all the data lies within three standard deviation of the mean for a normal distribution.
  • About 68% of data lies within one standard deviation of the mean.
  • About 95% of data lies within two standard deviations of mean.
  • Arround 99.7% of data lies within three standard deviation of mean.

Thus, by empirical rule,

\mu \pm 1\sigma = 15\pm (3.02) = (11.98,18.02)

According to the Empirical Rule, 68% of the data should fall between 11.98 and 18.02

5 0
2 years ago
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