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SOVA2 [1]
3 years ago
9

a company observes the lifespan of 560 lightbulbs and finds that their data follows a normal distribution. what is the approxima

te number of light bulbs that fall within two standard deviations from the mean?
Mathematics
1 answer:
quester [9]3 years ago
7 0
Empirical rule can be used to estimate the number of values that lie with 1, 2 or 3 standard deviations of a Normally distributed population.

According to the empirical rule, 95% of the values lie within 2 standard deviations of the mean.

Total number of bulbs = n = 560
95% of n = 0.95 x 560 = 532

This means, 532 bulbs will lie within 2 standard deviations from the mean 
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telo118 [61]

Answer:

2/3

Step-by-step explanation:

7/12+1/12=8/12

<u>8</u>  / 4     <u>2</u>

12 / 4     3

Final answer 2/3

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3 years ago
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3 years ago
Which of the following units is incommensurable with kilograms
Delvig [45]

Answer:

All units of measurement that are not based on or do not measure mass or weight and volume are incommensurable with kilograms.

Step-by-step explanation:

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7 0
3 years ago
What values of x makes the expression (x-6)(x+3) positive?​
Georgia [21]

Answer:

This means that for (x-6)(x+3) to be positive, the value of x has to be greater than 6; x>6

Step-by-step explanation:

Step 1

Given the equation;

(x-6)(x+3)

Step 2

To determine the values of x that make the equation positive, the equation can be expressed as;

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This means that for (x-6)(x+3) to be positive, the value of x has to be greater than 6; x>6

4 0
3 years ago
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