Standard Deviation Topic Questions
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We found 35 questions associated with the 'Standard Deviation' topic. Displaying results 1 - 10.
A random sample of 49 shoppers showed that they spend an average of $23.45 per visit at the Saturday
... Mornings Bookstore. The standard deviation of the population is $2.80. Find a point estimate of the population mean. Find the 90% confidence ...
Posted 3+ months ago | 0 answers | 
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Related topics: random, morning, saturday, point, standard, visit, shopper, bookstore, confidence, population, standard deviation, ...
A batch of 5000 electric lamps has been a mean of 1000 hours and a standard deviation of 75 hours.
Assuming a normal distribution a) how many lamps will fall before 900 hours b) how many lamps will fall between 950 and 1025 c)what is proportional ...
Posted 3+ months ago | 0 answers | | Open
Related topics: fall, lamp, hour, electric, standard, distribution, normal, standard deviation
Construct a 99% confidence interval estimate of the difference μs−μf?
Randomly selected 15 student cars have ages with a mean of 8 years and a standard deviation of 3.4 years, while randomly selected 28 faculty cars ...
Posted 3+ months ago | 1 answers | | Open
Related topics: student, year, standard, ages, confidence, faculty, car, cars, years, age, standard deviation
Is margin of error 2 times the standard deviation?
Posted 3+ months ago | 0 answers | | Open
Related topics: standard, error, time, standard deviation
Sampling error?
I know standard deviation in dollars and number of random samples. Question is sampling error within $100 of mean. Long time since grandpa took ...
Posted 3+ months ago | 0 answers | | Open
Related topics: random, number, dollar, grandpa, standard, error, question, numbers, time, standard deviation
A batch of 5000 electric lamps has a mean life of 1000 hours and a standard deviation of 75...
... hours. Assume a normal distribution. i) How many lamps will fail before 900 hours? ii) How many lamps will fail between 950 and 1000 hours? ...
Posted 3+ months ago | 1 answers | | Open
Related topics: life, lamp, hour, electric, standard, distribution, normal, standard deviation
Please help me
If the result of a test were normally distributed with a mean of 70 and a standard deviation of 10, what would the area below the probability density ...
Posted 3+ months ago | 0 answers | | Open
Related topics: area, standard, below, density, result, probability, standard deviation
Distribution sores and standard deviations?
Questions 3a through 3d are based on a distribution of scores with¯X=75 and the standard deviation = 6.38. Draw a small picture to help you see ...
Posted 3+ months ago | 0 answers | | Open
Related topics: picture, score, draw, standard, distribution, question, 3d, standard deviation
The Sudso beer company is required to fill all bottles as advertised with a minimum fill of 12?
... ounces. Each bottle will only hold 12.25 ounces. The current process fill is running at an average of 12.07 ounces with a standard deviation of ...
Posted 3+ months ago | 0 answers | | Open
Related topics: beer, running, bottle, company, standard, current, standard deviation
A recent survey indicated that the average amount spent for breakfast by business managers was $7.58
... with a standard deviation of $0.42. It was felt that breakfast on the west coast were higher than $7.58. A sample of 81 business managers on the ...
Posted 3+ months ago | 0 answers | | Open
Related topics: coast, breakfast, felt, managers, standard, spent, manager, survey, standard deviation
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