suppose the diameter of farmland is normally distributed with mean of 8.6 km and a standard deviation of 2.7 km
what is the probability that the diameter of a randomly selected farmland will be between 6.4 km and 12 km?
suppose the diameter of farmland is normally distributed with mean of 8.6 km and a standard...
suppose the diameter of farmland is normally distributed with mean of 8.6 km and a standard deviation of 2.7 km i) what is the value of x such that the interval (8.6-x, 8.6+x) contains 94% of all diameter values? ii) what is the probability that the diameter of a randomly selected farmland will be between 6.4 km and 12 km?
A) The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What is the probability that the diameter of a randomly selected pencil will be between 0.21 and 0.29 inches? B) The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What is the probability that the diameter of a...
Suppose IQs are normally distributed with a mean of 100 and a standard deviation of 16. a) If one person is randomly selected, what is the probability that the person’s IQ is higher than 90 but lower than 115? b) If eight people are randomly selected, what is the probability that the sample mean IQ is higher than 90 but lower than 115?
Suppose that the weight of seedless watermelons is normally distributed with mean 6.2 kg. and standard deviation 1.7 kg. Let X be the weight of a randomly selected seedless watermelon. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N( ___ , ____ ) b. What is the median seedless watermelon weight? ____ kg. c. What is the Z-score for a seedless watermelon weighing 7.3 kg? _____ d. What is the...
assume that blood pressure reading are normally distributed with a mean of 125 and a standard deviation of 6.4. if 64 people are randomly selected, find the probability that their mean blood pressure will be less than 127. round to four decimal places.
Based on historical data, the diameter of a ball bearing is normally distributed with a mean of 0.527 cm and a standard deviation of 0.009 cm. Suppose that a sample of 36 ball bearings are randomly selected. Determine the probability that the average diameter of a sampled ball bearing is greater than 0.530 cm. a. 0.9772 b. 0.0228 c. 0.5062 d. 0.0559
15) Assume that z scores are normally distributed with a mean of 0 and a standard deviation 15) of 1. If P(z> c) 0.109, find c. olve the problem. 16) 16) Scores on an English test are normally distributed with a mean of 37.4 and a standard deviation of 7.9. Find the score that separates the top 59% from the bottom 41% 17) Suppose that replacement times for washing machines are normally distributed with a 17) mean of 10.9 years...
Suppose that SAT test produces scores that are normally distributed with mean = 500 and standard deviation = 100. what is the probability that at least two of the five randomly selected individuals will have SAT scores in the range [490, 535]? Show all steps. Thanks
The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.71 inches and a standard deviation of 0.05 inches. A random sample of 11 tennis balls is selected. What is the probability that the sample mean is between 2.70 and 2.72 inches
5. Assume the readings on thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. Find the probability that a randomly selected thermometer reads between −2.26 and −1.53 and draw a sketch of the region. 6. Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the probability of a bone...