3. Determining confidence interval estimate (o is known). The standard deviation of the masses of500 blocks is 2.50 kg. Random samples of 50 blocks have a mean mass of 24 kg. Determine a 90%confidence interval for estimating the mean mass of the population.5. Determining confidence interval estimate (o is unknown). The mean of the masses of randomsamples of 25 blocks is 30 kg with a standard deviation of 1.50 kg. Determine 90% confidence intervalsfor estimating the mean mass of the population.

We have given that Sample size n =50 Sample mean =24 Population standard deviation =2.50 90%…

Answered: etermining confidence interval estimate…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The weight of male contestants is normally distributed with a mean of 96 kg pounds and a standard deviation of 12 kg. If 35% of contestants satisfy a maximum weight requirement for police officers, what is the maximum weight requirement?
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If the standard deviation of hole diameter significantly exceeds 0.011 mm, there is an unacceptably high probability that a rivet designed to be placed in the hole will not fit. After drilling 30 of these holes, a sample standard deviation in hole diameter was calculated as 0.012 mm. Construct a 95% interval estimate for the true deviation of the hole diameters and discuss the likelihood of the standard deviation exceeding our target.
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 130, while the mean score was 71 and the standard deviation was 13. 32 45 97 110 58 71 84 Distribution of Test Scores Q What is the approximate percentage of students who scored less than 45 on the test? What is the approximate percentage of students who scored between 71 and 84 on the test? What is the approximate percentage students who scored between 58 and 84 on the test? What is the approximate percentage of students who scored between 45 and 97 on the test?
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A sample has mean of 36 and a standard deviation of 8. Would a score of 36 be considered a central score or extreme score
Consider population data with 5 being the standard deviation, 5 being the mean. Compute an 88.9% chebyshev interval around the population mean
According to an article in Good Housekeeping, a 128-lb woman who walks for 30 minutes four times a week at a steady, four-mi/hr pace can lose up to 10 lbs over a span of a year. Suppose 35 women with weights between 125 and 130lb perform the four walks per week for a year and at the end of the year the average weight loss for the 35 was 9.1 lbs. If the sample standard deviation is 5, calculate the value of the test statistic and find the p-value of the hypothesis test of Ho:µ =10 vs H1:µ≠10.
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samples with sample size of 5 are drawn form a normal population with a mean of 100 and standard deviation of 1.5. Estimate: - Mean of the sample means - Standard deviation of the sample means

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