5. A sample of 16 elements from a normally distributed population is selected. The sample mean is 10 with a standard deviation of 4. The 95% confidence interval for u is A. 8.04 to 11.96 C. 2.16 to 17.84 B. 1.476 to 18.524 D. 7.869 to 12.131

Q: The average salary of 64 employee was 5400 and the sample standard deviation was 280. Find the 90%…

A:

Q: a random sample of seven cell​ phones, the mean full retail price was ​$575.00 and the standard…

A: Given, Mean (x-) = 575 Standard deviation (s) = 226 c= 99% = 0.99

Q: The diameter of holes for a cable harness is known to have a normal distribution with a star…

A: Given information: Population standard deviation is 0.01. A random sample of size 10 yields an…

Q: . A simple random sample of size n=100 is taken from a normally distributed original population.…

A:

Q: Assume that a sample is used to estimate a population mean µ. Find the 99.5% confidence interval for…

A: Solution To calculate the confidence interval we will use t distribution.

Q: 4. Assume a normal distribution with known population variance. Calculate the confidence interval…

A: The formula for the confidence interval for the population mean when the population standard…

Q: A sample of 66 elements from a normally distributed population is selected, The sample mean is 11…

A:

Q: 2. A sample of 38 data observations has a sample mean 0.0328. If an experimenter wishes to use a…

A: Given  n=38, Xbar=0.0328, sigma=0.015 and alpha=0.01 Zcritical=2.578 at alpha=0.01

Q: Assume that a sample is used to estimate a population mean u. Find the 99.5% confidence interval for…

A: Confidence interval give a range of values for an unknown parameter of the population. The width of…

Q: The average salary of 36 employee was 4650 and the sample standard deviation was 165. Find the 99%…

A: We associate with the interval estimate is called a confidence interval. This probability indicates…

Q: Assuming that the population standard deviation is given as 48.9. The sample statistics are n=19 and…

A: given data n = 19x¯ =58.2σ = 48.995% ci for μ = ?

Q: A random sample of 115 light bulbs had a mean life of x = 507 hours. Assume that o = 32 hours.…

A: Given  Sample size=n=115, sample mean x̄=507, standard deviations σ=32  Construct 90% CI for…

Q: 9A. The time to failure of 12 batteries was measured. The average time to failure of the 12…

A: A confidence interval, in statistics, refers to the probability that a Population parameter will…

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: GPA of SMSU students is normally distributed with standard deviation o = 0.8. The average GPA of a…

A:

Q: In a random sample of 21 people, the mean commute time to work was 32.3 minutes and the standard…

A: From the provided information, Sample size (n) = 21 Sample mean (x̅) = 32.3 minutes Sample standard…

Q: We have calculated a 95% confidence interval and would prefer for our next confidence interval to…

A: The 95% confidence interval was calculated and would prefer the next confidence interval to have a…

Q: The random sample shown below was selected from a normal distribution. 3, 5, 5, 10, 4, 9 D Complete…

A:

Q: 5. A random sample of size 30 from a normal population yields - 32.8 with a population standard…

A: Given that n=30 & standard deviations =4.15 we have to find 97% CI  Here is table reference for…

Q: A sample of size 8 has a mean of 76 and a standard deviation 9. Assuming the population is…

A: since we know the population standard deviation i.e.,  σ=144=12 we would use the following formula…

Q: The upper limit of a 95% confidence interval for the population mean would equal:

A: Given that  Sample size n = 20 Sample mean M = 77.1 Sample variance s2 = 45.1 The critical value of…

Q: 4) A study of 29 female Sumatran elephants provided a 96% confidence t-interval for the mean the…

A: Solution: 4. The standard error of the mean is calculated by using the formula:

Q: 2. A confidence interval for the population mean based on 16 individuals has been reporte to (34.14,…

A:

Q: A random sample of size 49 from normal population yields, mean = 58.6 and standard deviation = 15.2.…

A: The confidence interval is the range of intervals in which the true value of the population…

Q: 9A. The time to failure of 12 batteries was measured. The average time to failure of the 12…

A:

Q: Assume that a sample is used to estimate a population mean u. Find the 90% confidence interval for a…

A: The sample size is 56, the sample mean is 19.4 and the sample standard deviation is 17.9.

Q: Assume that a sample is used to estimate a population mean u. Find the 80% confidence interval for a…

A: Givensample size(n)=52Mean(x)=55.2standard deviation(s)=9.1confidence inerval = 80%

Q: A random sample of 70 observations has a mean of 40. The population standard deviation is assumed to…

A:

Q: Assume that a sample is used to estimate a population mean u. Find the 99.5% confidence interval for…

A:

Q: Find t, for a 95% confidence interval for the population mean. The sample size is 30. O a. 1.699 O…

A: The random variable X follows normal distribution. The level of confidence is 95%. The sample size…

Q: The average salary of 64 employee was 5400. Using historical data, we will assume that the…

A: Given; Number of employee = 64 Average salary=5400 Standard deviation = 280.

Q: Assuming that the population standard deviation is given as 8.5. The sample statistics are n=20 and…

A: Sample size=20 C.I=90% ?=1-C.I=1-0.90=0.10

Q: Construct a 95% confidence interval for the population standard deviation o of a random sample of 15…

A:

Q: .2 and X right 2 Find X left for a 95% confidence interval using the chi-square distribution with 9…

A: Given Information: Degrees of freedom df=9 Confidence level =95%=0.95 Significance level…

Q: 33. A simple random sample of size n = 51 is taken from a normally distributed original population.…

A: Solution To find the confidence interval we will use Excel

Q: normally distributed. Use co

A:

Q: A simple random sample of size n=64 is taken from a normally distributed original population.  The…

A: From the provided information, Sample size (n) = 64 Sample standard deviation (s) = 37

Q: A random sample of 149 full-grown lobsters had a mean weight of 15 ounces. Assume that population…

A:

Q: 5. Suppose that the heights (in inches) of adult males in Tanjung Malim are believed to be normally…

A: The question is about confidence interval Given : Randomly selected no. of adult males ( n ) = 25…

Q: 5. Assume that the population has a normal distribution. Thirty randomly selected students took the…

A: Mean = 83Standard deviation = 13.599% confidence level