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The foreman at a large plant estimates defective parts about 1.5% of the time. If the plant produces 25,000 parts in a week, what is the standard deviation (to the nearest tenth) for the number of defective parts?
Statistics and Probability, Statistics
A new type of soft drink from Frackly Inc. is sold in 500 milliliter (ml) bottles. The mean volume of drink placed in a bottle is 490 ml with a standard deviation of 6.1 ml. Assuming a normal distribution of the data, wh ...
An electronics store receives a shipment of 37 graphing calculators, including 5 that are defective. Eight calculators are chosen at random to be sent to a local high school. How many selections contain 3 defective?
Heights of women follow a normal distribution with mean μ=63.6 inches and standard deviation of σ=2.5 inches. Suppose random samples of 10 women are chosen and their mean height calculated. Please calculate the mean and ...
During a certain week the mean price of gasoline was $2.719 a gallon. A ronadom sample of 32 stations is drwn. What is the probability that the mean price was between $2.695 and $2.716. Assume o=$0.048.
Consider the binomial distribution where n = 11 and p = 0.05. Find the mean and standard deviation of this binomial distribution. The customers at a local appliance store are polled as they leave the store. Each is asked ...
A fish tank in a pet store has 23 fish in it. 11 are orange and 12 are white. Determine the probability that if we select 4 fish from the tank, at least 2 will be white.
Two fair dice are rolled and the sum of the points is noted. Find the probability that the sum is 6 given that at least one of the numbers is less than 3.
Consider a machine with exponential reliability model. Assume that the breakdown rate is 1 and the repair rate is 2. Calculate the probability that the machine is up for more than 10 units of time. Calculate the probabil ...
State whether each of the following will increase, decrease, or have no effect on the population variance. (a) the sum of squares ( SS ) increases This change will increase the population variance. This change will decre ...
Assume that when adults with smartphones are randomly? selected, 42?% use them in meetings or classes. If 7 adult smartphone users are randomly? selected, find the probability that at least 5 of them use their smartphone ...
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