A 95% confidence interval for the population mean is calculated to be 75.29 to 81.45. If the confidence level is reduced to 90%, the confidence interval will:

Q: A 90% confidence interval estimate for a population mean is determined to be 72.8 to 79.6. If the…

A: We know that a (1-α)% confidence interval for the population mean is given by; x¯-zα2σn, x¯+zα2σn…

Q: Determine the point estimate of the population mean and margin of error for the confidence interval.…

A: Given, Lower bound = 18  upper bound = 26

Q: If n = 240 and X = 192, construct a 90% confidence interval for the population proportion, p. Give…

A: Find z-critical value:…

Q: 3. needed to estimate the percentage of adults who can touch their nose with Find the sample size…

A:

Q: The mean and the standard deviation of a normal population are 11,795 and 14054 respectively. If n=…

A:

Q: If n=12, x=47, and s=7, construct a confidence interval at a 98% confidence level. Assume the data…

A: According to the provided information,

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A:

Q: A sample of 700 from population A has a proportion of interest of 0.24 while a sample of 600 from…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: Construct the confidence interval for the population mean  c=0.95, x=8.7 standard deviation=0.8 and…

A:

Q: a. Find the best point estimate of the mean. b. Find the 95% confidence interval of the mean score…

A: According to the answering guidelines, we can answer only three subparts of a question and the rest…

Q: A survey of 30 adults found that the mean age of a person’s primary vehicle is 5.6 years. Assuming…

A: A confidence interval is a type of estimate computed from the statistics of the observed data. This…

Q: If n = 380 and X = 304, construct a 95% confidence interval for the population proportion, p. Give…

A: Given: n = 380 x = 304

Q: If X=72​, σ=13​, and n=66​, construct a 95​% confidence interval estimate of the population​…

A:

Q: Determine tc for n = 15 and a confidence level of 99%.

A: From the given information, Sample size (n) =15, Confidence level (1-α)= 0.99 Thus, the t-critical…

Q: A toy manufacturer wants to know how many new toys children buy each year. A sample of 242 children…

A:

Q: Assume that a sample is used to estimate a population proportion p. To find the 95% confidence…

A:

Q: If n = 220 and X = 176, construct a 95% confidence interval for the population proportion, p. Give…

A:

Q: If n = 440 and X = 352, construct a 90% confidence interval for the population proportion, p. Give…

A:

Q: and X = 96, construct a 90% confidence interval for the population proportion, p. Give your answers…

A: Given X=96 N=120

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.