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 is within 0.005 of the population mean? Assume that a 99% confidence level is desired. If using the range rule of thumb, o can berange4 - 0estimated as4= 1. Does the sample size seem practical?4The required sample size is(Round up to the nearest whole number as needed.)Does the sample size seem practical?O A. Yes, because the required sample size is a fairly small number.B. No, because the required sample size is a fairly large number.C. Yes, because the required sample size is a fairly large number.O D. No, because the required sample size is a fairly small number.

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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 estimate of the population proportion should be within plus or minus .05, with a 95% level of confidence. The best estimate of the population proportion is 15. How large a sample is required? (Use z Distribution Table) ( Round z-value to 2 decimal places and round up your answer to the next whole number) What is the sample size?
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 is within 0.005 of the population mean? Assume that a 95% range 4-0 confidence level is desired. If using the range rule of thumb, o can be estimated as =1. Does the sample size seem practical? 4 4
Find the critical value tc for a 95% confidence level when the sample size is 18. Use Table 4 on page A10 (Appendix) A. 1.740 B. 2.110 C. 2.101 D. 1.734
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I only need part B
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 is within 0.008 of the population mean? Assume that a 98% confidence level is desired. If using the range 4-0 =1. Does the sample size seem practical? range rule of thumb, o can be estimated as 4 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 large number. O B. No, because the required sample size is a fairly small number. OC. Yes, because the required sample size is a fairly small number. O D. Yes, because the required sample size is a fairly large number.
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?
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Next question If a sample proportion is 0.68, which of the following could be a 90% confidence interval for the population proportion? ..... Select all that apply. A. Lower bound: 0.59; Upper bound: 0.77 B. Lower bound: 0.66; Upper bound: 0.70 OC. Lower bound: 0.50; Upper bound: 0.77 D. Lower bound: 0.77; Upper bound: 0.95 E. Lower bound: 0.67; Upper bound: 0.71 F3 F4 F5 F7 F8 24 4. %23 2 3. 6. Left control option command
Determine whether the following statements are True or False: If we increase the confidence level C, then the width of the CI decreases, i.e., the CI becomes narrower. (Hint: think about what happens to the margin of error m) Suppose the mean of a population µ = 100. If we found that the margin of error is m = 2 for level of confidence 98%, then we can be 98% confident that a sample mean (computed from a sample of the same size used to compute m) is in the interval (98, 102).
ACT scores are normally distributed with mean 22 and standard deviation 4.7. A random sample of 32 MiSU students has a mean ACT of 23.6. A. Estimate the mean ACT score for all MiSU students at the 95% confidence level. B. If we want to estimate the mean ACT score for all MiSU students at the 99% confidence level with a margin of error of 10, then what sample size will we need?
Assume that all grade-point averages are to be standardized on a scale between 0 and 6. How many grade-point averages must be obtained so that the sample mean is within 0.012 of the population mean? Assume that a 95% confidence level is desired. If using the range rule of thumb, σ can be estimated as range/4=6−0/4=1.5. Does the sample size seem practical?

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