What is the minimum sample size required to estimate a population mean with 90% confidence if the population standard deviation is estimated to be 30 and the desired margin of error is 2?
Solution :
Given that,
standard deviation = = 30
margin of error = E = 2
At 90% confidence level the z is ,
= 1 - 90% = 1 - 0.90 = 0.10
/ 2 = 0.10 / 2 = 0.05
Z/2 = Z0.05 = 1.645
Sample size = n = ((Z/2 * ) / E)2
= ((1.645 * 30) / 2 )2
= 609
Sample size = 609
What is the minimum sample size required to estimate a population mean with 90% confidence if...
24. Find the minimum sample size required to estimate a population proportion with a margin of error = 0.05 a confidence level of 90%, and from a prior study, p is estimated to be .25 (a) 203 (b) 329 (c) 247 (d) 396 (e) 289 25. In a survey of 385 students at Broward College, North Campus, results revealed that 154 students were born outside of the USA. Construct a 96% confidence interval estimate for the proportion of students who...
Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.09; confidence level: 90%; from a prior study, (p-hat) is estimated by 0.17.
Determine the minimum sample size n needed to estimate μ given that the confidence level is 90%, the population standard deviation is 6.8, and the margin of error is 1. Show complete solutions. Round up your answer to the nearest whole number.
Find the minimum sample size required to estimate a population proportion with a margin of error equal to .04 and a confidence level of 90%. A recent study resulted in a sample proportion of .70. ALSO determine the minimum sample size if no prior study was done.
Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: 0.01; confidence level 90%; p and ĝ unknown n= (Round up to the nearest integer.)
2) Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.058; confidence level: 90%; and unknown sample proportion p^. 0 201 0223 O 202 0 222 JUL 3 D 31 ER
Use the given information to find the minimum sample size required to estimate an unknown population mean u. Margin of error: $130, confidence level: 95%, 0 = $560 50 63 072 101
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 __.
Use the given information to find the minimum sample size required to estimate an unknown population mean, μ . Margin of error 153.0, confidence level- 95.0 percent and σ 574.6 A) B) n 2 52 C) D) None of These n 2 55
Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many business students must be randomly selected to estimate the mean monthly earnings of business students at one college? We want 95% confidence that the sample mean is within $131 of the population mean, and the population standard deviation is known to be $529.