12/27/2023 0 Comments Mean of percentages calculatorThe life expectancy of batteries has a normal distribution with a mean of 350 minutes and a standard deviation of 10 minutes. How many students will score less than 75? Are there at leįive thousand students take an exam with a mean of 59 and a deviation of 8. Is there anyone with an IQ above 130 points? b. With what probability among 15 randomly selected people: a. a) What is the probability that a randomly selected light bulb will have a lifespan of more than 320 hours? b) To what value of L hours can the laĪssume that the IQ in the population follows a normal distribution with a mean of 100 points and a standard deviation of 10 points. The lifetime of a light bulb is a random variable with a normal distribution of x = 300 hours, σ = 35 hours. The participants receiving the top 5% of the s Consider that the scores in the exam are normally distributed with a mean of 78 and a standard deviation of 7.5. In a college entrance exam, the participants are rated as excellent, very good, good, and fair. Establish a 95% confidence interval to est When checking the use-by date of a specific type of canned meat in warehouses of meat industry products, 340 canned goods were randomly selected, and it was found that 63 of them had passed their warranty period. How many tubes do have a length: a) between 16.5 cm and 18.1 cm b) greater than 17 cm The arithmetic mean is 17.27 cm, and the standard deviation is 1.2 cm. What is the value of x if it is z = +1.50? Suppose a distribution has a mean µ = 8 and standard deviation σ = 4. three claims in a given week, more than four claims in a given Assuming that a Poisson distribution can model the number of claims, find the probability it receives. An insurance company receives, on average, two claims per week from a particular factory.
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