There is a claim that the mean annual turnover rate of bottle of B Aspirin is 12. It is suspected that the mean is changed. Therefore, a randomsample of 64 is chosen that shows the average is 14 and the standard deviation is 8. Use 0.07 significance levelBased on the above, the test statistic is equal to?(Round answer to two decimal places ex. 2.09)

The provided information is n=64x¯=14s=8α=0.07 a.The null and altenative hypothesis is…

Answered: There is a claim that the mean annual…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A manufacturer of bolts has a quality control policy that requires it to destroy any bolts that are more than 2 standard deviations from the mean. A sample of 15 bolts were tested and their variance was recorded to be 10. Stating any assumptions you need to make, test, at the 5% level, whether the bolts are meeting the established standard.
Suppose that the average number of Facebook friends users have is normally distributed with a mean of 145 and a standard deviation of about 57. Assume forty-nine individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. Find the first quartile for the average number of Facebook friends.
According to the World Health Organization, the average height of a one-year-old child is 29". You believe children with a particular disease are smaller than average, so you draw a sample of 20 children with this disease and find a mean height of 27.5" and a sample standard deviation of 1.5". The test statistic is -4.4721 and the p-value is 0.00013 using the calculator function TTEST. If a=0.05, what conclusions can be made? Provide a detailed conclusion including contextualization to the given scenario.
An exam score has a mean of 78 and a standard deviation of 9. What is the z-score for an exam score of 64.5? What is the z-score for an exam score of 82.5? Which exam score is more unsual, 64.5 or 82.5? O An exam score of 64.5 is more unsual because its corresponding z-score is further from 0. O An exam score of 82.5 is more unusual because its corresponding z-score is further from 0.
Aspirin is packed in 120 tab bottles with weight normally distributed with mean 600g and standard deviation 6g. Rejected bottles are those whose weight differs from the mean weight by 15g or more. That is, rejected bottles have weight either too small or too large. We want to find out how many bottles will be rejected from a daily production of 5000 bottles. 1,Do we have to calculate one z-score or two z-scores? 2. The negative z-score is 3. The positive z-score is 4.How many bottles, of the 5000, do we anticipate to have to reject?
Suppose that IQ scores have a bell-shaped distribution with a mean of 96 and a standard deviation of 17. Using the empirical rule, what percentage of IQ scores are between 79 and 17. 113?
Per the Barron's report the average weeks unemployed is 21.5 (population mean) with a population standard deviation of 5 weeks and a sample of 55. Calculate the standard error of the mean to two decimals.
According to the USDA, the mean intake of calories of males 20-39 is 2716 with a standard deviation of 72.8Would you find it unusual to have a sample mean of 2750 or higher for a sample size of 35? Why?
the height of American men is normally distributed with a mean of 70 in and a standard deviation of 3 in. what are the heights in inches that define the most extreme 8% of the population of American men?
The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell- shaped distribution. This distribution has a mean of 44 and a standard deviation of 9. Using the empirical rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 26 and 53? Do not enter the percent symbol. ans =
The president of a college wants to determine the mean number of units that college students take per semester. How large of a sample is required in order to be 99% sure that a sample mean will be off by no more than 1.25 units? An initial study suggested that the standard deviation is approximately 2.1 units.
Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.068.06 and a standard deviation of 1.521.52. Using the empirical rule, what percentage of American women have shoe sizes that are at least 9.589.58?

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