A simple random sample of size n=17 is drawn from a population that is normally distributed. The sample mean is found to be x=59 and the sample standard deviation is found to be s=14. Construct a 95​% confidence interval about the population mean.

Q: = The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard…

A: N = 22 Degree of freedom : df = N-1 = 22 - 1 = 21 Sample standard deviation  : S = 3.9  Confidence…

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: Given  Margin of error=8, level of significance ɑ=0.05, standard deviations σ=10

Q: Julia enjoys jogging. She has been jogging over a period of several years, during which time her…

A: Given,sample size(n)=90sample mean(x¯)=15.61population standard…

Q: A simple random sample of size n=25 is drawn from a population that is normally distributed. The…

A:

Q: A simple random sample of size n=40 is drawn from a population. The sample mean is found to be…

A: Given, Sample size = 40 Sample mean = 121.7 Sample standard deviation = 12.2   Since the population…

Q: How large a sample should be selected to provide a 99% confidence interval with a margin of error of…

A: Given,standard deviation(σ)=50margin of error (E)=10α=1-0.99=0.01α2=0.005Z0.005=2.58

Q: Assume that the population of serum amylase determinations from which the sample of size  15 (s = 33…

A: s = 33 n = 15 CL = 0.98

Q: A simple random sample of size n=40 is drawn from a population. The sample mean is found to be…

A: n=40 X-bar=121.2 S=13.2 99℅ confidence  interval

Q: A simple random sample of size n=16 is drawn from a population that is normally distributed. The…

A: Given information : Sample size = n = 16 Sample mean = x = 66 Sample standard deviation = s = 19…

Q: Use The t Distribution Table to find the t/α2 value for a 90% confidence interval for the mean when…

A: It is needed to find the tα/2 value for a 90% confidence interval for the mean when the sample size…

Q: The average height of a population is unknown. A random sample from the population yields a sample…

A: From the provided information, the sample mean and the standard deviation of the sampling…

Q: A simple random sample of size n=17 is drawn from a population that is normally distributed. The…

A: The random variable X follows approximately normal distribution. The sample size is 17. The sample…

Q: A sample of n = 43 data values randomly selected from a normally distributed population has varlance…

A: Degrees of freedom = n-1=43-1=42 (by using the standard normal table)

Q: A sample of size 50 from a normal distribution has sample mean 5 and sample variance 20. Find 96%…

A: To find the confidence interval for the variance, we need to use the Chi-squared distribution. The…

Q: Use The t Distribution Table to find the  t/α2  value for a  95%  confidence interval for the mean…

A: We have given that Confidence level (c) = 95% = 0.95 Significance level (α) = 1 - 0.95 = 0.05 Sample…

Q: Suppose we are interested in a confidence interval for the population mean scores on an exam. A…

A: We have given that,  Sample mean (x̄) = 67.89, population standard deviation (σ) = 9.90 and sample…

Q: Suppose we are interested in a confidence interval for the population mean scores on an exam. A…

A: We have given that,  Sample mean (x̄) = 107.65, population standard deviation (σ) = 4.72 Then,  We…

Q: t*

A: Given Confidence interval for population mean=97% Sample size n=17

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: Given : Margin of error = 5 α = 0.05 Population standard deviation = σ = 30 zα2 = z0.052 = 1.96

Q: A simple random sample of size n=15 is drawn from a population that is normally distributed. The…

A: Given information: n=15 x=57 s=20 Confidence level is 95% Significance level is 5%=0.05…

Q: Construct a 90% Confidence Interval for the population mean u

A: Given that the sample size is n = 36 Sample mean = 106 Population SD = 12 At 90% confidence level,…

Q: GPA of SMSU students is normally distributed with standard deviation (sigma) = 0.8. The average GPA…

A:

Q: Suppose we are interested in a confidence interval for the population mean scores on an exam. A…

A: We have given that.Sample size (n) = 99Sample mean (x̅) = 95.71Population Standard deviations (σ) =…

Q: The mean replacement time for a random sample of 12 cd players is 8.6 years with a standard…

A:

Q: In a study, Group 1 was found to have an average of 53 and a population standard deviation of 13 out…

A:

Q: Suppose scores on exams in statistics are normally distributed with an unknown population mean and a…

A: solution:Given thatsample sizen=36sample meanx=68population standard deviationσ=3then we will find…

Q: G3 We randomly select 100 fish from a reservoir and measure the length of them. The average length…

A: Given information: Sample size n=100 Average length of the fish x¯=33 cm Standard deviation of the…

Q: How large of a sample is required for a to construct a 95% confidence interval around a mean with an…

A: It is given that  Standard deviation, σ = 95 Margin of error, E = 3

Q: How large of a sample is required for a to construct a 90% confidence interval around a mean with an…

A: Given information- Population standard deviation, σ = 105 Let, Confidence interval = 0.90…

Q: Samples of 25 scores are selected from a population. If the distribution of sample means has an…

A: According to the given information in this question, we need to find the mean and standard deviation

Q: The number of square feet per house are normally distributed with a population standard deviation of…

A: We have to calculate 80% confidence level margin of error.

Q: A simple random sample of size n=40 is drawn from a population. The sample mean is found to be…

A: The given sample size is 40, sample mean is 120.1 and sample standard deviation is 13.1.

Q: A sample of 20 items provides a sample standard deviation of 4. a. Compute the 90% confidence…

A:

Q: A simple random sample of size n=18 is drawn from a population that is normally distributed. The…

A:

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.