4. You collected data from a normally distributed random process. Your computed sample mean is 12 using15 measurements, but you know the population standard deviation exactly and it is 1.25. Define aprediction interval that you are 80% sure will encompass the next sample. NOTE: Since you have thepopulation standard deviation, you need to find a "z" value instead of a "t" value on this problem.5. You have made 7 measurements of the length of a bolt using a ruler as shown in the table. You thinkthat you might have made one or more bad measurements. Apply Chauvenet's criterion to eliminate any"bad" data point(s) and calculate a mean and sample standard deviation that excludes those values.Reading Measured Value (cm)12.111.712.514.211.8.12.311.31234567

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Answered: 4. You collected data from a normally…

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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Jeremiah earned a score of 530 on Exam A that had a mean of 450 and a standard deviation of 40. He is about to take Exam B that has a mean of 63 and a standard deviation of 20. How well must Jeremiah score on Exam B in order to do equivalently well as he did on Exam A? Assume that scores on each exam are normally distributed.
A particular fruit's weights are normally distributed, with a mean of 271 grams and a standard deviation of 28 grams.If you pick 3 fruits at random, then 7% of the time, their mean weight will be greater than how many grams?Give your answer to the nearest gram.
A particular fruit's weights are normally distributed, with a mean of 317 grams and a standard deviation of 29 grams. If you pick 25 fruits at random, then 5% of the time, their mean weight will be greater than how many grams? Give your answer to the nearest gram.
A marketing specialist wants to estimate the average amount spent by visitors to an online retailer's newly-designed website. From the data in a preliminary study she guesses that the standard deviation of the amount spent is about 14 dollars. Question 1. How large a sample should she take to estimate the mean amount spent to within 5 dollars with 95% confidence? (Round your answer up to the next largest integer).
A particular fruit's weights are normally distributed, with a mean of 689 grams and a standard deviation of 13 grams.If you pick 10 fruits at random, then 4% of the time, their mean weight will be greater than how many grams?Give your answer to the nearest gram.
You determine that the standard deviation for a sample of test scores is 0. This tells you that 1 all the test scores must be 0. 2 all the test scores must be the same value. 3 there is no straight-line association. 4 the mean test score must also be 0. 5 you made a mistake because the standard deviation can never be 0.
A rugby team from the country of Atlantis is formed by randomly drawing from its population. The population distribution is normally distributed with a mean of 165 cm and a standard deviation of 10 cm. The team draws 26 people for the team. Given a population mean of 165cm, how many standard deviations would a sample mean of 163cm be from the true value? Give your answer rounded to two decimal places.
Suppose that human pulse rates for children over 10 and adults are approximately normally distributed with a mean of 78 and standard deviation of 12. Suppose as random.Answer the question following question, rounding your answers to 4 decimal places.
A particular fruit's weights are normally distributed, with a mean of 580 grams and a standard deviation of 30 grams.If you pick 100 fruits at random, then 20% of the time, their mean weight will be greater than how many grams?Enter your answer to the nearest gram.
A particular fruit's weights are normally distributed, with a mean of 701 grams and a standard deviation of 30 grams.If you pick 24 fruits at random, then 2% of the time, their mean weight will be greater than how many grams?Give your answer to the nearest gram.
A large population of 5,000 students take a practice test to prepare for a standardized test. The population mean is 140 questions correct, and the standard deviation is 80. What size samples should a researcher take to get a distribution of means of the samples with a standard deviation of 10? provide the solution of above questions

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