A manufacturer of calculator batteries claims that the mean length of life for its battery is 500 operating hours. Suppose the standard deviation of the length of life is known to be 25 operating hours, and the discretion of life lengths is symmetric and mound-shaped. Approximately what percentage of the manufacturer's batteries will less than 525 hours?

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Q: Suppose the average amount of apples per tree in a large orchard is 600 pounds with a standard…

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Q: If the average number of textbooks in professors' offices is 14, the standard deviation is 5, and…

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Q: If the mean height of bonsai trees is 52 cm with a standard deviation of 10 cm, 95% of the trees are…

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Q: On a final examination in Biology, the mean was 75 and the standard deviation was 12. What is the…

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Q: A class has a average height of 68 inches and a standard deviation of 2 inches. What percent of the…

A: Let x be the height which follows normal distribution with mean 68, and standard deviation 2. The…

Q: A class has an average height of 68 inches and a standard deviation of 2 inches. Find each value,…

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Q: In 2019, the amount of money that motorists spent on gas had a normal distribution with a mean of…

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Q: A livestock company reports that the mean weight of a group of young steers is 1300 pounds with a…

A: It is an important part of statistics. It is widely used.

Q: the length of a certain species of fish were found to be normally distributed. the mean length is 72…

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Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…

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Q: Annabelle earned a score of 410 on Exam A that had a mean of 450 and a standard deviation of 40. She…

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Q: In one town, the number of pounds of sugar consumed per person per year has a mean of 6 pounds and a…

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Q: The typical college freshman spends an average of ?=150 minutes per day, with a standard deviation…

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Q: Based on daily measurements, Brenda's weight has a mean of 200 pounds with a standard deviation of…

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Q: How many of the people surveyed will have a weight between 130 and 140lbs?

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Q: Christian earned a score of 80 on Exam A that had a mean of 200 and a standard deviation of 40. He…

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Q: Assume that the heights of 400 basketball players are normally distributed with a mean of 175 cm and…

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Q: A livestock company reports that the mean weight of a group of young steers is 1180 pounds with a…

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Q: Suppose the weekly rent of international students in Sydney is normally distributed with a mean of…

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Q: The heights of people are normally distributed with a mean of 86 inches and a standard deviation of…

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Q: If the average height of all women is 63.5 inches and the standard deviation is 2.5 inches,…

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Q: The time is takes a studen to walk from the dorn to the chemistry lab follows roughly a Normal…

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Q: An instructor in a large lecture class found, at the end of the semester, that the total point…

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Q: If the coefficient of variation for a data is given as  35%, and the standard deviation for the same…

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Q: Suppose the distribution of heights of a group of 300 children is normal, with a mean of 150…

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Q: a data set has a mean of 210 and a standard deviation of 40, what is the z- Score for a ralue of140…

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Q: If the weight of fertilizer in a 40-pound bag is normally distributed with a standard deviation of…

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Q: for a population with a standard deviation of 8 and mean of 40, draw a bell shaped curve, marking…

A: Given data  Mean = 40 and standard deviation= 8

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.