A normal random variable X is having mean 99 and standard deviation 5.78. What is p(X>78)? Round to 4 decimals
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A normal random variable X is having mean 99 and standard deviation 5.78.
What is p(X>78)?
Round to 4 decimals
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- A population of values has a normal distribution with �=105.6 and �=10.5. Find the probability that a single randomly selected value is greater than 102.1. Round your answer to four decimal places. �(�>102.1)= Find the probability that a randomly selected sample of size �=66 has a mean greater than 102.1. Round your answer to four decimal places. �(�>102.1)=In a chemistry general exam, the grades are approximately Normally distributed with mean 77 and standard deviation 6 then #If Students don’t pass chemistry if their grade falls below 62 then the proportion of all students fail in chemistry is 0.0047 0.0228 0.0062 Nonepopulation has a mean of 200 and a standard deviation of 50. Suppose a simple random sample of size 100 is selected and is used to estimate u. a. What is the probability that the sample mean will be within 25 of the population mean? b. What is the probability that the sample mean will be within@10 of the population mean? L(Ctrl) -
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- Suppose that the weight of seedless watermelons is normally distributed with mean 6.9kg and standard deviation 1.9kg. Let X be the weight of a randomly selected seedless watermelon. Round to 4 decimal places. What is the median seedless watermelon weight?Suppose X is a random variable with mean 16 and standard deviation 4 which follows normal distribution. Find the probability that x is less than 18? Round your answer to four decimalswhat is the standard deviation of x1=20 x2=30 x3=32 x4=21 x5=24 x6=11?
- Suppose speeds of vehicles traveling on a highway have an unknown distribution with mean 63 and standard deviation 4 miles per hour. A sample of size n=34 is randomly taken from the population and the mean is taken. What is the probability that the sample mean is less than 65 mph? Do not round your answer.Q3 i) The average number of acres of land cultivated with food grains is normally distributed with mean 4,300 acres per year, and standard deviation of 750 acres. What is the probability that between 2,500 and 4,200 acres will be cultivated in any given year? What number of cultivated acres corresponds to the 38th percentile?
