Among various ethnic groups, the standard deviation of heights is known to be approximately three inches. A Forty-eight male Swedes are surveyed. The sample mean is 71 inches. A 95% confidence interval for the population mean height of male Swedes is: (70.167,71.833) O (71.167,72.833) ( 70.151,71.849) 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: 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: How large a sample should be selected to provide a 90% confidence interval with a margin of error of…

A:

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: A sample of ?=25 diners at a local restaurant had a mean lunch bill of $16 with a standard deviation…

A: From the provided information, Sample size (n) = 25 Standard deviation (σ) = $5 Confidence level =…

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

A:

Q: A sample of 49 managers reveals a sample mean of $45,420. The standard deviation of the samp is…

A: As the population standard deviation is not known, we will use t-distribution. The number of degrees…

Q: A cell phone company claims that the average time a person spends on their phone is 12.8 hours a…

A: Given that, Population mean=μ=12.8 Hours Sample mean=X Bar=12.2 Hours Sample standard deviation= 2.3…

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

A:

Q: In a random sample of twelve ​people, the mean driving distance to work was 21.5 miles and the…

A: Solution

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

A:

Q: On the Standford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with…

A:

Q: In an effort to estimate the mean amount spent per customer for dinner at a major Atlanta…

A: From the provided information, Sample size (n) = 49 Sample mean (x̅) = $24.80 Population standard…

Q: In a random sample of 15 ​people, the mean driving distance to work was 18.5 miles and the standard…

A:

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: 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: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: Solution (a) Let μ denotes the population mean price in Providence for a bottle of red wine that…

Q: In a random sample of ten ​people, the mean driving distance to work was 18.1 miles and the standard…

A:

Q: A study of 64 bolts of carpet showed that their average length was 75 yards. The standard deviation…

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 270. Find the 90%…

A:

Q: A pollster asked a random sample of 269 students about their savings. The average amount of money…

A: The sample size is 269, sample mean is $258, and sample standard deviation is $145. The degrees of…

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: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: mu = 32.48 xbar = 30.15 s = 12 n = 61

Q: A pollster asked a random sample of 269 students about their savings. The average amount of money…

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: A bread shop owner wishes to find the 95% confidence interval of the true mean cost of special…

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

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: In an effort to estimate the mean dollars spent per visit by customers of a food store, the manager…

A: Given: s = $12.30  n = 100

Q: or a sample of 121 that has a mean of 6540 and a standard deviation of 780, calculate the 90%…

A:

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

A:

Q: 3. Another engineer studies the strength of cables, which has a known population standard deviation…

A: Here we need to obtain the minimum sample size required to obtain a 97% confidence interval.

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: In a survey, 23 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=23sample mean (x) = 31standard deviation (s) = 8α = 1-0.95=0.05α2=0.025degrees…

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: A sample of 256 managers reveals a sample mean of $45,420. The standard deviation of the sample is…

A: Given: A sample of 256 managers has a sample mean of $45,420 and a standard deviation of $2,050.…

Q: In a random sample of twelve ​people, the mean driving distance to work was 18.8 miles and the…

A: From the given information we want to construct 90% confidence interval.

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: 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: 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: The general social survey asked how many emails do you send in a day? The results of 928 respondents…

A: It is given that the number of residents is 928, the number of emails sent in a day is 10.4 and the…

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: (a) Let μ denotes the population mean price in Providence for a bottle of red wine that scores 4.0…

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…