Assume that population means are to be estimated from the sample described. Use the sample results...
Assume that population means are to be estimated from the sample described. Use the sample results to approximate the margin of error and 95% confidence interval. Sample size = 1030 Sample mean = $46,228 Sample Standard Deviation = $25,000 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 to approximate the margin of error and 95% confidence interval. Sample size equals =1, 043, sample mean equals =$46, 198, sample standard deviation equals = $26,000
Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and 95% confidence interval. Sample size, n= 100; sample mean, x = 74.00 cm; sample standard deviation, s=5.00 cm The margin of error is cm. (Round to two decimal places as needed.) Find the 95% confidence interval. cm<u< cm (Round to two decimal places as needed.)
o Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and 95% confidence interval n = 36. X = 62.8 seconds, S = 6.1 seconds The margin of error is seconds (Round to one decimal place as needed) Find the 95% confidence interval seconds <<seconds (Round to one decimal place as needed.) imeframe Enter your answer in each of the answer boxes This course (STATISTICAL REASONING IN...
Assume the population proportion is to be estimated from the sample described. Find the approximate margin of error and the 95% confidence interval for the population proportion. Sample sizeequals144, sample proportionequals0.28 The margin of error is nothing. (Round to four decimal places as needed.) Find the 95% confidence interval.
1. Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of (4.0, 4.8) when estimating the mean height (in centimeters) of a sample of seedlings. 2. In a random sample of 26 people, the mean commute time to work was 32.2 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% confidence interval for the...
1) A sample of size 25 is chosen from a population. Assume the probability distribution is normal. If the mean of the sample is 80 and the standard deviation is 6, find the lower bound of the 99% confidence interval. Round off to three decimal places. 2) A sample of size 36 is chosen from a population. The sample mean is 50 and the standard deviation is 5. Find the upper limit of the 95% confidence interval for the population...
1. A random sample of size n is drawn from a population that is normally distributed with a standard deviation of 8. The sample mean is found to be 50. 1.a) Construct a 98% confidence interval (CI) for the population mean uif the sample size is 16. The critical value used is The (margin of) error for the 98% confidence interval (C.I.) is The resulting Cl is 1.b) Construct a 95% confidence interval for the population mean u if the...
Assume that you want to construct a 95% confidence interval estimate of a population mean. Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval. The sample standard deviation is given below. Margin of error equals$5, standard deviation equals$19 The required sample size is __.
A simple random sample of 60 items resulted in a sample mean of 90. The population standard deviation is 13. 1) Compute the 95% confidence interval for the population mean (to 1 decimal). 2) Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). 3) What is the effect of a larger sample size on the margin of error?