Among various ethnic groups, the standard deviation of heights is known to be approximately three inches. Forty-eight male Swedes are surveyed. The sample mean is 71 inches. A 92% confidence interval for the population mean height of male Swedes is O (70.151,71.849) O (70.167,71.833) O (71.167,72.833) O (70.238,71.762)

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

A:

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

A: Given,   Sample size = 900 Sample mean = 2.7 Sample standard deviation = 0.4   Calculation:…

Q: From a random sample of 64 high school seniors, the sample mean and standard deviation of the math…

A: The sample size is 64, sample mean is 96, and standard deviation is 16. The degrees of freedom is,…

Q: From a random sample of 49 high school seniors, the sample mean and standard deviation of the math…

A:

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: Which of the following would increase the width of a confidence interval for a population mean?

A:

Q: Among various ethnic groups, the standard deviation of heights is known to be approximately three…

A:

Q: Calculate a ninety-nine (99) percent confidence interval for µ, where n = 100, sample mean = 38, and…

A:

Q: The General Social Survey asked, “How many emails do you send in a day?” The results of 928…

A: Given information Sample size, n = 928 Mean, x-bar = 10.4 Standard deviation, σ = 28.5 Since sample…

Q: The number of unhealthy days based on the AQI (Air Quality Index) for a random sample of…

A: Given information- Sample size, n = 10 Calculating sample mean and sample standard deviation using…

Q: In an examination of purchasing patterns of shoppers, a sample of 16 shoppers revealed that they…

A: From the given information, sample mean, x̅=54 Population standard deviation, σ=21 Sample size n =16…

Q: The population standard deviation for the height of college hockey players is 3.4 inches. If we want…

A:

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: The mean for the verbal component of the SAT is reported as 500, with a standard deviation of 100. A…

A: It is given that the sample mean is 498 and the population standard deviation is 100.

Q: Find the Confidence interval for the true Population Mean if a sample of 50 has a mean of 26.8 and a…

A:

Q: A sample of 14 commuters in Cebu showed the average of the commuting times was 33.2 minutes. If the…

A: Sample size : n=14 Sample mean : x¯=33.2 Sample standard deviation : s=8.3 Confidence level :…

Q: Please calculate a 95% confidence interval with a single sample mean 45, sample size of 30, and…

A: Given that  Sample size n =30 Sample mean =45 Sample standard deviation =5.4

Q: From the scores in subject statistics for 8 students, it was found that the mean score is 73 and the…

A: We have given that,  Sample mean (x̄) = 73,  standard deviation (s) = 5.15 and sample size (n) = 8…

Q: In analyzing the city and highway fuel efficiencies of many cars and​ trucks, the mean difference in…

A:

Q: In a random sample of ten people, the mean driving distance to work was 21.8 miles and the standard…

A: Given,sample size(n)=10mean(x)=21.8standard deviation(σ)=6.4α=1-0.99=0.01α2=0.005degrees of…

Q: The average salary of 64 employee was 5400 and the sample standard deviation was 280. Find the 95%…

A: It's a t distribution as the population standard deviation is unknown

Q: A survey of 31 accountants shows the average salary is $65,000 with a population std deviation of…

A: Given : Sample size, n= 31 Mean = $65000 Population standard deviation = 7000

Q: given a standard deviation of + or - 0.023m at the 90% confidence level, what is the 68% error level…

A: The confidence level of the data is 90%. The standard deviation of the data with error percentage is…

Q: Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal…

A: Construction of the test statisticXi~Nμ , O2 , i =cn , independently⇒ x  ~N μ σ2n n-1S2σ2 ~ Xn-12…

Q: Fifteen SmartCars were randomly selected and the highway mileage of each was noted. The analysis…

A:

Q: Given a mean of 62, a standard deviation of 8, and a sample size of 150, construct a 99.7%…

A: Given that a mean of 62, a standard deviation of 8 and a sample size of 150. We have to construct a…

Q: Fifteen Smart Cars were randomly selected and the highway mileage of each was noted. The analysis…

A: Solution: Let X be the highway mileage of smart car. From the given information, x-bar=47 miles per…

Q: In a survey, 12 people were asked how much they spent on their child's last birthday gift. The…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: The average weight of 50 randomly selected minivans was 4,200 pounds. The minivan population…

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: According to NEA Advocate (2007), the averages for the 2005-2006 academic year, 34 CSU Stanislaus…

A: The provided information is x¯1=$65800x¯2=$72400σ1=$12000σ2=$8000n1=34n2=40α=0.05 The critical value…

Q: A simple random sample of 41 Veterans Day celebrations was selected and the number of children…

A: (14) Obtain the 98% confidence interval for the mean number of children attending all 2017 Veterans…

Q: The mean time it takes for a random sample of 758 airplanes to fly from Florida to New York was…

A: airplanes to fly from Florida to New York μ=165  standard deviation σ=45 The mean time n=758…

Q: In a random sample of 100 basketball players,the average vertical jump was 38 inches. If you somehow…

A: a) The margin of error is, Thus, the margin of error is 1.96 inches.

Q: Suppose an economist wishes to estimate the mean commute time of workers in Westchester County. The…

A: Given, Sample size n = 31Sample mean x¯ = 31.2Sample standard deviation s = 12.1

Q: The average salary of 64 employee was 5400 and the sample standard deviation was 260. Find the 90 %…

A:

Q: A professor at a local community college is interested in studying the amount of hours that a…

A: See the handwritten solution

Q: Find the error bound for an unknown population mean or the margin of error that corresponds to a 85%…

A: Find the error bound for an unknown population mean or the margin of error that corresponds to a 85%…

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: How much money does the average professional football fan spend on food at a single football game?…

A:

Q: In a survey, 21 people were asked how much they spent on their child's last birthday gift. The…

A: Margin of error is the error due to random sampling. The margin of error decreases with increase in…

Q: he following stemplot shows the swimming speeds, in kilometers per hour  (km/h), for a random sample…

A: xbar = 9.771 s = 0.944 n = 31

Q: For a group of 10 men subjected to a stress situation, the mean number of heart beats per minute was…

A:

Q: In a survey, 19 people were asked how much they spent on their child's last birthday gift. The…

A: The summary of the statistics is, The degree of freedom is, df=n-1   =19-1   =18 Critical value: By…

Q: In a survey, 41 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: The average weight of 35 randomly compact automobiles was 2680. The sample standard deviation was…

A: From the provided information, Sample size (n) = 35 Sample mean (x̅) = 2680 Sample standard…

Q: We measure the heights of 57 students and obtain a sample mean of 67 inches and a sample standard…

A: Given information- Sample size, n = 57 Sample mean, x-bar = 67 inches Sample standard deviation (s)…

Q: The average weight of 35 randomly selected compact automobiles was 2680 pounds. The sample standard…

A: From the provided information, Sample size (n) = 61 Sample mean (x̅) = 2680 Sample standard…

Q: A bank wishes to estimate the mean credit card balance owed by its customers. The population…

A: We have to find sample size ....

Q: Among various ethnic groups, the standard deviation of heights is known to be approximately three…

A: