Question

Why do population means require the use of the T score? Why are there 2 equations...

  1. Why do population means require the use of the T score?
  2. Why are there 2 equations to determine a sample size of a proportion? Explain

Homework Answers

Answer #1

SOLUTION:

From given data,

Why do population means require the use of the T score

When sample size less than 30 and population standard deviation are unknown then use confidence interval by t.

we can use here formula,

Why are there 2 equations to determine a sample size of a proportion? Explain

Since confidence interval for population is

Now ,

Margin of error (E) =

By squaring on both sides ,

There is no need of 2 equations to determine a sample size of a proportion

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Why are there 2 equations to determine a sample size of a proportion? Explain How are...
Why are there 2 equations to determine a sample size of a proportion? Explain How are confidence intervals interpreted? List the 4 confidence levels and their corresponding Z score. Why do population means require the use of the T score?
When performing inference on population means we require that the data are normal and/or that the...
When performing inference on population means we require that the data are normal and/or that the sample size is large (to use the Central Limit Theorem) so that the sample means have a sampling distribution that is at least approximately normal. The exact same statement (in bold) holds for performing inference on population variance(s) using the χ 2 or F-test. (a) True (b) False
Why is it important to compute confidence intervals for estimates of population means or percentages? A....
Why is it important to compute confidence intervals for estimates of population means or percentages? A. Because every sample statistic is subject to error. B. Because managers don’t like point estimates. C. Because every sample statistic must be presented without error. D. Because the sample statistic = the population parameter. The calculated z or t value is inversely related to the size of the differences between two means or percentages (i.e., as the difference between two means or percentage increases,...
To calculate z score , you have to know the raw score , population mean ,...
To calculate z score , you have to know the raw score , population mean , and standard deviation. Of the following what matches with the three ; Sample proportion , Sample size , wnd Popularion proportion .
- How do we use sample results to estimate values of population parameters? - What are...
- How do we use sample results to estimate values of population parameters? - What are the best point estimates of the population proportion "p", population mean "μ" and standard deviation "σ"? Why? - How accurate is the sample result of 85% likely to be? - Given that only 1,007 people were polled in the population of 241,472,385 adults, is the sample sample size too small to be meaningful? - What is a critical value? How is it related to...
Use "PLUC" data and the description for the dataset on the blackboard. What t test shall...
Use "PLUC" data and the description for the dataset on the blackboard. What t test shall be used to compare the population means of "LWAS" between male and female. One sample t test Two sample independent t test paired t test X^2 test Two sample proportion z test Use "PLUC" data and the description for the dataset on the blackboard. What t test shall be test if the population mean of LWAS of males is more than 75. One sample...
The MINITAB printout shows a test for the difference in two population means. Two-Sample T-Test and...
The MINITAB printout shows a test for the difference in two population means. Two-Sample T-Test and CI: Sample 1, Sample 2 Two-sample T for Sample 1 vs Sample 2      N Mean StDev SE Mean Sample 1 5 29.00 3.00 1.3 Sample 2 7 28.89 3.63 1.4 Difference = mu (Sample 1) - mu (Sample 2) Estimate for difference: 0.11 95% CI for difference: (-4.3, 4.5) T-Test of difference = 0 (vs not =): T-Value = 0.06 P-Value = 0.96...
38. If a population is not normally distributed, the distribution of the sample means for a...
38. If a population is not normally distributed, the distribution of the sample means for a given sample size n will A. take the same shape as the population                        B. approach a normal distribution as n increases C. be positively skewed D. be negatively skewed E. none of the above 39. A random sample of 66 observations was taken from a large population. The population proportion is 12%. The probability that the sample proportion will be more than 17% is...
Assume that population means are to be estimated from the samples described. Use the sample results...
Assume that population means are to be estimated from the samples described. Use the sample results to approximate the margin of error and​ 95% confidence interval. Sample size- 1,042 Sample mean - 46,245 Standard Deviation- 26,000 1-The margin of error is 2-Find the​ 95% confidence interval.
Assume that population means are to be estimated from the samples described. Use the sample results...
Assume that population means are to be estimated from the samples described. Use the sample results to approximate the margin of error and​ 95% confidence interval. Sample size=1,048​, sample mean=​$46,209​, sample standard deviation=​$21,000 The margin of error is $ __
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT