.  In a random sample of eight cell​ phones, the mean full retail price was ​$564.50 and the standard deviation was ​$163.00. Assume the population is normally distributed and use the​ t-distribution to find the margin of error and construct a 90​% confidence interval for the population mean μ. Interpret the results. Identify the margin of error.  Cell phones dollars square dollars

Q: A researcher wishes to test whether the mean of a normally distributed population is greater than…

A:

Q: Given a sample with s = 8.5 and n = 21. Estimate the population standard deviation with 90% of…

A: Given that Sample size n = 21 Sample SD = 8.5 The critical values of Chi-square at 90% confidence…

Q: Suppose the mean​ per-person check for brunch at a restaurant chain is approximately ​$13.75.…

A: The formula for the sample size needed to estimate a population mean is

Q: Suppose you wish to estimate the average height of adults using a sample of 20 adults where the mean…

A:

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: From the information,  sample size is 4749, mean of 26.86 lb and a standard deviation of 12.82 lb

Q: If specifications for a research project require the standard error of the corresponding…

A: From the provided information, Standard error (SE) = 5 Population standard deviation (σ) = 45

Q: The number of Grade 11 learners per section in Kasiglahan Village Senior High School has a mean of…

A: The population mean is 56.3. The population standard deviation is 8.6. We have to write which…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Use excel formula "=NORM.S.DIST(1.976, TRUE)" to find the probability.

Q: 3 In a large city the distribution of incomes per family has a standard deviation of $5200. (i) For…

A: According to central limit theorem, if the population is normally distributed or sample size is at…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Introduction:The sampling distribution of the sample mean, X̅ for a large sample (n ≥ 30) is…

Q: The proportion of all high school students who watch national news is p = 0.57. A random sample of…

A:

Q: What is the minimum sample size required to estimate a population mean with 95% confidence when the…

A: Given, standard deviation, σ = 10.75 margin of error, E = 1.9

Q: The shape of the distribution of the time required to get an oil change at a 15-minute oil-change…

A: By central limit theorem, the distribution of sample mean follows a Normal distribution if the…

Q: Given a standard error of 5.2 with a sample size of 9. Then the standard deviation is

A: Solution: 4. From the given information, a standard error is 5.2 and n=9.

Q: 3. The sample mean weight of 65 adult African elephants was measured to be 14,325.62 pounds, with a…

A:

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Given information, the mean is 27.09 and a standard deviation of 12.43 lb. That is, μ=27.09 and…

Q: If the manager of a bottled water distributor wants to estimate, with 95% confidence, the mean…

A:

Q: Suppose the mean​ per-person check for brunch at a restaurant chain is approximately $13.75.     c.…

A: Given Data : Margin of error, ME = 0.25 population standard deviation, σ =…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A:

Q: A researcher claims that the mean of the salaries of elementary school teachers is greater than the…

A: Given: The descriptive statistics given is as follows

Q: 7. A researcher wants to estimate the mean income of all physicians in a city at a 95% confidence…

A: Given,standard deviation(σ)=17500margin of error(E)=5000α=1-0.95=0.05α2=0.025Z0.025=1.96    (from…

Q: Suppose the mean​ per-person check for brunch at a restaurant chain is approximately ​$13.75.…

A: The formula for the sample size needed to estimate a population mean is

Q: A government agency provides the number of miles that residents of the 75 largest metropolitan areas…

A: The random variable X follows normal distribution. There are two samples of data which are named as…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Given that, n=4925,μ=26.11lbσ=12.96 lb The proportion of weeks in which the waste disposal…

Q: 10. A measure of the right atrial pressure (mm Hg) was made for cardiac patients who were given…

A: The appropriate test statistic to conclude the indifference between the mean right atrial pressure…

Q: 1. The average height of the students in a famous college in the city is unknown but the standard…

A: 1. The population standard deviation is 0.8, sample size is 49, and sample mean is 6.1. Computation…

Q: If the population standard deviation is σ=10, how large a sample is necessary to have a standard…

A: σ=10   The standard error is given by SE = σn n = (σSE)2

Q: m the distributor. On average, how many of these tires Would Ahmed expect to be blemished? O 12 O 40…

A: Given: n=25,x=12.7,σ=2.1,α=0.05

Q: Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A: Given that :  The distance traveled per truck is normally distributed with a mean ( µ ) : 50,000…

Q: The Quality Control Manager wants to estimate the mean life of light bulbs to within ±20 hours with…

A: Given that the Quality Control Manager wants to estimate the mean life of light bulbs to within ±20…

Q: Suppose that the caffeine in one tablespoon of Folgers is normally distributed with a mean of 45 mg…

A:

Q: The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries…

A: Given, x=46.05n=25σ=5.1α=0.025 The hypothesis to be tested here is: H0:μ=50H1:μ<50 This is a left…

Q: The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.59, with a…

A: Given : n(sample size) =56 x(amount purchased)

Q: Consider a population of 1024 mutual funds that primarily invest in large companies. You have…

A: We want to find the range in part(c)

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Solution: Let X be the weight. From the given information, X follows normal distribution with mean…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A:

Q: if a population has a mean  of 75 and a standard deviation of 15    (a) what is the mean of the…

A: Given,sample size(n)=25mean(μ)=75standard deviation(σ)=15

Q: The mean number of travel days per year for salespeople employed by three hardware distributors…

A:

Q: Assume that a sample is used to estimate a population mean µ. Find the margin of error M.E, that…

A:

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Hypothesis Testing (Z-TEST)           In statistics, we have to determine the variation…

Q: ne hundred (900) high school freshmen were randomly selected for a national survey. Among survey…

A: Given data,Mean x=2.7sd     σ=0.4n=900What is the margin of error at 95% confidence level?

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A:

Q: 14. Find the sample size that will produce the maximum error of a 99% confidence interval for a…

A:

Q: If the manager of a bottled water distributor wants to estimate, with 95% confidence, the mean…

A: From the provided information, Standard deviation (σ) = 0.04 Confidence level = 95%

Q: Suppose population 1 is all blue cars sold at used car auctions, and the mean sale price of all such…

A: Given  Sales of red cars and blue cars and few other parameters.we need to find whether it has 2…

Q: 3- At a computer manufacturing company, the actual size of a particular type of computer chips is…

A: We have to find required sample mean.

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Let Xi be the waste disposed by the ith household, i=1,2,....,n=4729. We have…

Q: population has a mean of 75 and a standard deviation of 15 (a) what is the mean of the sampling…

A:

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

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.