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.   Margin of​ error, E=4.8 ​minutes; sample standard​ deviation, s=59.2 minutes The required sample size is

Q: The mean height for the population of a species of gorilla is believed to be 70 inches, and the…

A: Sample size n =20 Sample mean=73 Population standard deviation =4 NOTE:- According to bartleby…

Q: A population mean is 13. The sample mean is 12.8, and the sample standard deviation is two. The…

A: Given The data is as follows: Population mean, μ=13 Sample mean, x¯=12.8 Sample sd, s=2 Sample size,…

Q: Esmeralda wants to estimate a population mean age of residents of a retirement community. Based on…

A: given data  σ = 6.2 for 90% confidence  α = 0.10α2 = 0.051-α2=0.95 Z* = invNorm(0.95,0,1) = 1.645…

Q: The ICUAdmissions dataset includes a variable indicating the age of the patient. Find a 90%…

A: Given data,x=57.55SE=1.42n=200z-value at 90% confidence is Zc=1.645

Q: The mean score on a driving exam for a group of​ driver's education students is 60 ​points, with a…

A: Solution:From the given information, k value is 22, standard deviation of points is 4 and mean…

Q: A public bus company official claims that the mean waiting time for bus number 14 during peak hours…

A:

Q: You measure 38 textbooks' weights, and find they have a mean weight of 52 ounces. Assume the…

A:

Q: Cost of an Operation A medical researcher surveyed 11 hospitals and found that the standard…

A: Given that  n=11 , S=53

Q: he lengths of pregnancies in a small rural village are normally distributed with a mean of 263 days…

A: Empirical rule: About 68% of values fall within one standard deviation of the mean. i.e. μ-σ, μ+σ…

Q: You work for a soft-drink company in the quality control division.  You are interested in the…

A: a. Sample standard deviation: For the given sample, s=0.0764, from the excel function,…

Q: 6. Determine whether a normal distribution or a t-distribution should be used to construct a…

A: The decision to use a normal distribution or a t-distribution depends on whether the population…

Q: € cell phones dollars square dollars is ne

A: According to the given information in this questionwe need to find the value of margin of error and…

Q: work for a soft-drink company in the quality control division.  You are interested in the standard…

A: Formula :

Q: In a random sample of six mobile devices, the mean repair cost was $75.00 and the standard deviation…

A: Given: The sample number of mobile devices are n=6. The sample mean repair cost is x¯=75. The…

Q: Weights of Elephants A sample of 8 adult elephants had an average weight of 11,800 pounds. The…

A: From the given information, number of adult elephants n = 8. Average weight of the sample adult…

Q: You work for a soft-drink company in the quality control division.  You are interested in the…

A: Followings are the Explanation of the question Calculate the Sample Mean and Sample Standard…

Q: Determine a 95%-confidence interval for u.

A: Given that, Sample size (n) = 16 Sample mean (x¯) = 2.53 Sample variance (σ^2x) = 1.21 Sample…

Q: Construct a confidence interval of the population proportion at the given level of confidence.…

A:

Q: Find: Null hypothesis & Alternative hypothesis test statistic P-value conclusion

A: a. Let σ be the population standard deviation of the pulse rates of women. The claim of the test is…

Q: An apple grower wishes to estimate the mean number of apples per tree in his orchard. He selects a…

A: Step 1: State the given: sample mean, x̄ = 600sample standard deviation, s = 50sample size, n =…

Q: Body temperatures of healthy adults have a bell-shaped distribution with a mean of 98.20°F and…

A: From the provided information, Population mean (µ) = 98.20 Population standard deviation (σ) = 0.62

Q: A simple random sample with n = 56 provided a sample mean of 23.5 and a sample standard deviation of…

A:

Q: A fitness instructor wants to estimate the average number of steps his clients walk per day. She…

A: When we extract some value for a population that is a sample. The sample is denoted by 'n'. Using…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days…

A: Determine the range that would be expected to find the middle 68% of most pregnancies. The range…

Q: Determine the sample size needed to construct a 95 % confidence interval to estimate the population…

A: Suppose μ is the population mean.

Q: You work for a soft-drink company in the quality control division.  You are interested in the…

A: Given data…

Q: You work for a soft-drink company in the quality control division. You are interested in the…

A: 11.84,11.99,12.03,12.07,12.04,11.95,11.87,12.04,12.09,12,12.05,12.01,12.01,11.73,11.96sample…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population…

A: Given,margin of error(E)=4population standard deviation(σ)=17α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population…

A: Here, σ=10, E=3, and CL=0.95. Note that the value of zα2 for 95% confidence level is 1.96.

Q: You work for a soft-drink company in the quality control division. You are interested in the…

A:

Q: In a random sample of seven people, the mean driving distance to work was 21.6 miles and the…

A: We have given that  Sample size n = 7 Sample mean = 21.6 Standard deviation = 6.6 99% confidence…

Q: Social Networking Sites A recent survey of 8 social networking sites has a mean of 14.03 million…

A: The sample mean is 14.03 million, the population standard deviation is 4.5 million.

Q: Assume that population means are to be estimated from the samples described. Use the sample results…

A: Given that, Mean = 77 Standard deviation = 8 Sample size = 144 95% confidence level

Q: Use technology to construct the confidence intervals for the population variance o and the…

A: Step-by-step procedure to obtain the 90% confidence interval for the population variance using the…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

A:

Q: You work for a soft-drink company in the quality control division. You are interested in the…

A:

Q: In a random sample of eleven people, the mean driving distance to work was 18.2 miles and the…

A: Confidence intervals are used to study the range where the population parameter is likely to occur.…

Q: Starting salaries of 100 college graduates who have taken a statistics course have a mean of $42,930…

A: a. Since the population standard deviation is unknown, t distribution can be used for the…

Q: Types of Error: A You take a sample of size 36 from a population, and compute the sample mean, which…

A: Type 1 and 2 errors: If we reject the null hypothesis where the null hypothesis is true is known as…

Q: - Repair Costs: Washing Machines You want to buy a washing machine, and a salesperson tells you that…

A: Given data is appropriate for testing of hypothesis to test z-test for difference of  means. Because…

Q: You measure 26 watermelons' weights, and find they have a mean weight of 36 ounces. Assume the…

A: Given, Sample size = 26 Sample mean = 36 Population standard deviation = 11.8   Since the population…

Q: In a random sample of six ​people, the mean driving distance to work was 23.2 miles and the standard…

A: We have given that  Sample size n =6 Sample mean = 23.2 Standard deviation =6.4

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population…

A: given data,μ=100σ=17normal distribution CI=0.90n=?

Q: Suppose you use simple random sampling to select and measure 44 dogs' weights, and find they have a…

A:

Q: A sample​ mean, sample​ size, and population standard deviation are provided below. Use the​…

A:

Q: Salaries of 39 college graduates who took a statistics course in college have a​ mean, x, of $62,300…

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.