Assume that all grade-point averages are to be standardized on a scale between 0 and 4. How many grade-point averages must be obtained so that the sample mean= 1. Doesrange.4-0%3Dis within 0.006 of the population mean? Assume that a 98% confidence level is desired. If using the range rule of thumb, o can be estimated asthe sample size seem practical?The required sample size is(Round up to the nearest whole number as needed.)Does the sample size seem practical?O A. No, because the required sample size is a fairly small number.O B. Yes, because the required sample size is a fairly large number.O C. No, because the required sample size is a fairly large number.D. Yes, because the required sample size is a fairly small number.

Determine the sample size n needed. From the information, given that assume that all grade point…

Answered: Assume that all grade-point averages…

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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The following sample data are from a normal population: Sample size (n) = 25, Sample mean=14, Sample standard deviation=3.6 With 95% confidence, what is the margin of error for the estimation of the population mean?
Determine the sample size needed to estimate a population with a mean of 10 units given that the population standard deviation is 50; use a confidence level of 90%.
How do you Recalculate the sample size needed for hat p =0.27?
You want to estimate the mean weight of quarters in circulation. A sample of 60 quarters has a mean weight of 5.682 grams and a standard deviation of 0.061 gram. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. The estimate for the mean weight of all quarters is (Round to three decimal places as needed.) grams. Find the 95% confidence interval for the mean weight of all quarters. grams < p< grams (Round to three decimal places as needed.)
10. The mean value of 130 observations is 17 and with variance equal to 0.98. Find 90% confidence interval of the population mean value.
You want to estimate the mean weight of quarters in circulation. A sample of 50 quarters has a mean weight of 5.658 grams and a standard deviation of 0.064 gram. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. grams. The estimate for the mean weight of all quarters is (Round to three decimal places as needed.) Find the 95% confidence interval for the mean weight of all quarters. grams<μ< grams (Round to three decimal places as needed.)
If you want to construct a 90% confident interval for a population mean such that it is within a quarter (population) standard deviation from the sample mean, then what is the minimum sample size required?
Use technology to help you test the claim about the population mean, μ, at the given level of significance, x, using the given sample statistics. Assume the population is normally distributed. Claim: μ> 1270; α=0.02; a=214.81. Sample statistics: x= 1293.27, n = 275 Identify the null and alternative hypotheses. Choose the correct answer below. OA. Ho: > 1270 OB. Ho: 21270 H₂H1270 H₂H1270 c. Ho: H≤ 1270 H₂: H> 1270 OE. Ho: s1293.27 H₂: > 1293.27 Calculate the standardized test statistic. The standardized test statistic is 1.80. (Round to two decimal places as needed.) Determine the P-value. P= (Round to three decimal places as needed.) OD. Ho: > 1293.27 H₂: Hs 1293.27 OF. Ho: 2 1293.27 H₂: <1293.27
Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 272 with 27.9% successes at a confidence level of 80%. M.E. = % Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Round final answer to one decimal place Question Help: Video Submit Question MacBook Air 80 888 F5 F6 F7 F8 F1 F2 F3 F4 @ # & 2 3 6. 7 8 W Y S D H. J K C V S LO R
A student wants to estimate the mean score of all college students for a particular exam. First use the range rule of thumb to make a rough estimate of the standard deviation of those scores. Possible scores range from 500 to 2000. Use technology and the estimated standard deviation to determine the sample size corresponding to a 99% confidence level and a margin of error of 100 points. What isn't quite right with this exercise? The range rule of thumb estimate for the standard deviation is (Type an integer or a fraction.) A confidence level of 99% requires a mimimum sample size of (Round up to the nearest integer.) What isn't quite right with this exercise? A. The range rule of thumb introduces too much inaccuracy for this procedure. B. Amargin of error of 100 points seems too high to provide a good estimate of the mean score. OC. These results don't apply to a test that has multiple choice questions.
Calculate the standard score (z-score) of the given sample mean. Round your answer to two decimal places. mu=57" and "sigma=14;n=38; bar(x)=62
For the specified margin of error and confidence level, obtain a sample size that will ensure a margin of error of at most the one specified. margin of error = 0.03; confidence level = 95% Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve. (Round up to the nearest integer.) n3=

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