Calculate the necessary minimum sample size for a good mean estimate given that za/2 = 0.6, ở = 4.1, and E = 0.08.О а. 946O b. 715О с. 31O d. 1192

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Answered: Calculate the necessary minimum sample…

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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2. The owner of a factory that sells a particular bottled fruit juice claims that the average capacity of their product is 250 ml. To test the claim, a consumer group gets a sample of 100 such bottles, calculates the capacity of each bottle, and then finds the mean capacity to be 248 ml. The standard deviation is 5 ml. Is the claim true?
Dylan has collected 20 quarters and wants to compare the age of each coin to the age of all coins in the US. Select all the reasons why a z-test should not be used. Choose all that apply: 1. The sample standard deviation cannot be calculated 2. The sample size is >10 3. We do not have the population standard deviation 4. The sample size is <30 5. The population is <500
The standard deviation of the distribution of sample means would be equal to:
The p hat =0.25, proportion standard deviation=0.065, and z=1.960. 34. What is the size of the sampling proportion?* A. small B. large C. both small and large D. cannot be determined
Find the standardized test statistic t for a sample with n = 25, x = 26, s = 3, and a = 0.005 if Ha: H>25. Round your answer to two decimal pla 0000 А. 1.67 B. 2.00 с. 1.24 D. 1.45
Let X 1 , … , X n be identically and independently distributed with population mean 9.3 and standard deviation 1.400. Let xbar be the sample mean, xbar = 1 n ∑ i = 1 n X i. Suppose n = 14. What is the mean squared error (MSE) of 0.742*xbar as an estimator for the population mean?
2. A normal level glucose control (80 – 105 mg/dL) was tested at the beginning of the morning shift at a local hospital. The reagent used was of the same lot number, the instrument operator was the same, and all conditions were controlled to ensure the results would not be affected by environment or by any condition that could be controlled. The following values were recorded in 12 consecutive days. Calculate the Standard error of the mean (SEM) Days Glucose levels (mg/dL) 92 1 93 92 4 90 89 6. 87 7 88 8. 89 9. 88 10 92 11 88 12 91
14. Pooled estimate of the standard deviation = 21.4, and n1 = n2 = 13. Thus, the standardized error is: Select one: 6.083 0.6 3.45 8.393
11. In order to estimate the mean amount of time computer users spend on the internet 10 each month, how many computer users must be surveyed in order to be 95% confident that your sample mean is within 11 minutes of the population mean? Assume that the standard deviation of the population of monthly time spent on the internet is 201 min. The minimum sample size required is computer users. What is a major obstacle to getting a good estimate of the population mean? O A. There may not be 1,283 computer users to survey. O B. It is difficult to precisely measure the amount of time spent on the internet, invalidating some data values. O C. The data does not provide information on what the computer users did while on the internet. O D. There are no obstacles to getting a good estimate of the population mean.
1. An experimenter feels that a population standard deviation is no larger than 17.0and would like to construct a 95% two-sided t-interval for the population mean that has alength at most 2.8. What sample size would you recommend?
A population has a standard deviation of 8. What is the minimum sample size needed to estimate a mean to within 2 units with 66.8% confidence? O A. 13 О В. 15 ОС. 12 O D. 16 O E. 14
Given a normal distribution with mean 25 and standard deviation 5, find the area under the normal curve from the men to the indicated measurement. A) 36.1?

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Calculate the necessary minimum sample size for a good mean estimate given that za/2 = 0.6, g = 4.1, and E = 0.08- a. 946 O b. 715 О с. 31 O d. 1192