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The heights of children 2 years old are normally distributed with a mean of 32 inches and standard deviation of 1.5 inches. Find the probability of these events.
a) A 2-year-old child is taller than 36 inches. P(X>36) =
b) A 2-year-old child is shorter than 34 inches. P(X<34) =
c) A 2-year-old child is between 30 and 33 inches tall.
P(30< X < 33) = - 2 - 4. The long-distance calls made by employees of a company are normally distributed with a mean of 6.3 minutes and a standard deviation of 2.2 minutes. Answer the following questions. a) What is the probability that a call lasts less than 4 minutes?
b) How long do the longest 10% of calls last? (Determine the cutoff point to the longest 10% of calls). Round up your answer to 2 decimal places.
Suppose a computer chip manufacturer rejects 2% of the chips produced because they fail presale testing. Assuming the bad chips are inde- pendent, find the probability of each of the following.
according to the most recent labor department data 10.5 of engineers electrical mechanical civil and industrial were
According to theoretical probability, how many times can we expect to land on each color, if we spin sixty times?
The x-ray department of a hospital has two machines, A and B, which can be used to develop x-ray film
Suppose a random sample of 20 tax returns from small business is examined. What is the binomial probability that at least one tax return involves fraud?
Use the GPA classification to adjust the weights of the respondents in the sample. What is the weighting-class estimate of the average viewing time?
Recently, three new airlines, MAX jet, L'Avion, and Eos, began operations selling business or first-class-only service. These airlines need to estimate the high
on nov 1 2012 there was a florida poll. the poll was of 549 likely florida voters. 47 said they were going to vote
Find the value of the linear correlation coefficient and Construct a 95% confidence interval for the population proportion of people in test with cholesterol
Assume that the population average for adults is 6 hours and 57 minutes, or 6.95 hours of sleep per night, with a standard deviation of 2 hours.
Dark treatment is between 0.26 and 1.14 cm shorter than the (population) mean for plants with the Light treatment. Discussion: Are Dark shorter than Light?
a random sample of size 64 is drawn from a population with mean 80 and standard deviation 20. describe the sampling
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