The number of hours of a certain device has been active are measured to the normally distributed closest hour with a mean of 450 hours and a standard deviation of 20 hours. When checking one device A What is the probability of 1. It being active for 420 or less hours. 2. It being active for 460 hours or more. 3. It being active for 400 500 hours. 4. It being active for 450 hours. B What is the difference in 4 above if the measurement was for the closest half hour 8- The number of hours of a certain device has been active are measured to thenormally distributed closest hour with a mean of 450 hours and a standard deviation of20 hours. When checking one device:A - What is the probability of:1. It being active for 420 or less hours.2. It being active for 460 hours or more.3. It being active for 400-500 hours.4. It being active for 450 hours.B - What is the difference in (4) above if the measurementВhour?was for the closest halfodwhussein

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The number of hours of a certain device has been active are measured to the normally distributed closest hour with a mean of 450 hours and a standard deviation of 20 hours. When checking one device A What is the probability of 1. It being active for 420 or less hours. 2. It being active for 460 hours or more. 3. It being active for 400 500 hours. 4. It being active for 450 hours. B What is the difference in 4 above if the measurement was for the closest half hour

8- The number of hours of a certain device has been active are measured to the
normally distributed closest hour with a mean of 450 hours and a standard deviation of
20 hours. When checking one device:
A - What is the probability of:
1. It being active for 420 or less hours.
2. It being active for 460 hours or more.
3. It being active for 400-500 hours.
4. It being active for 450 hours.
B - What is the difference in (4) above if the measurement
В
hour?
was for the closest half
odwhussein

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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