A sample of 20 cows is drawn to estimate the mean weight of a large herd of cattle.  If the standard deviation of the sample is 96 kg, what is the margin of error in a 90% confidence interval estimate?

Q: A researcher would like to estimate the mean weight of all adult male American alligators in the…

A: Givensample size(n)=80Mean(x)=522standard deviation(σ)=25Confidence level=96%

Q: A random sample of 21 Camden County College students had a mean age of 24 years, with a standard…

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Q: he number of square feet per house are normally distributed with an unknown population mean and…

A: Given information- Sample size, n = 33 Confidence level, C = 90% Significance level, α = 0.1 So,…

Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The…

A: Given data63,72,71,68,72,60Sample  size(n)=6Population standard deviation()=3

Q: A researcher would like to estimate the mean weight of all adult male American alligators in the…

A: Sample size (n) = 105Sample mean (x̅) = 502Standard deviations (σ) = 29Significance level (α) = 1 -…

Q: A study of peach trees found that the average number of peaches per tree was 625.  The standard…

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Q: From the normally distributed systolic blood pressures of a given patient population with a standard…

A: Sample mean = x̅ = 120 Sample size = n = 9 Population S.D = σ = 24 Standard Error = σ/√n  =…

Q: A sample of only 8 adult rhinos had an average weight of 2,500 pounds. The standard deviation for…

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Q: A data set includes 103 body temperatures of healthy adult humans having a mean of 98.5°F and a…

A: According to the given question A data set includes 103 body temperatures of healthy adult humans…

Q: The heights of pine trees at a local tree farm are known to follow a normal distribution with a…

A: Given: Sample Sizen=99Sample MeanX=121Standard Deviationσ=7 The z value corresponding to the area…

Q: The average height of students at UT from an SRS of 11 students gave a standard deviation of 3.0…

A: Givensample size(n)=11standard deviation(s)=3.0confidence level=95%

Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The…

A: According to the given information in this questionWe need to find margin of error and 99%…

Q: The average weight of 36 randomly selected school buses was 4150 pounds with a standard deviation of…

A: Given data,x=4150σ=480n=36z-value at 99% confidence is Zc=2.576

Q: A financial institution wishes to estimate the mean balances owed by its credit card customers. The…

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Q: A survey of 38 men found that the standard deviation is 3.3 and the average number of units for…

A: The sample size for men is 38, standard deviation is 3.3, and mean is 12.8. The sample size for…

Q: A sample of 13 concerts showed their average noise levels were 82 decibels and their standard…

A: Solution: Let X be the noise level From the given information, x-bar=82 decibels, s=7 decibels and…

Q: A recent study of 26 city residents showed that the time they had lived at their present address has…

A: Given, Sample size = 26 Sample mean = 10.3 Sample standard deviation = 3   Since the population…

Q: A professor decided to estimate the average time it takes for students to take tests. He measured…

A: The sample mean is 108 minutes and the sample size is 45.

Q: A random sample of 16 movies has been selected from a normally distributed population. If the mean…

A: Given that, a random sample of 16 movies has been selected from a normally distributed population.…

Q: In a hospital, a sample of 8 weeks was selected, and it was found that an average of 529 patients…

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Q: A laboratory tested 78 chicken eggs and found that the mean amount of cholesterol was 224 milligrams…

A:

Q: A marine biologist is interested in whether the chinook salmon a particular species of salmon in the…

A: The value of sample mean is, x¯=36 The value of margin of error is, ME= 9

Q: A data set includes 109 body temperatures of healthy adult humans having a mean of 98.2°F and a…

A: The random variable X follows normal distribution. The sample size is 109. The sample mean is 98.2.…

Q: Dr. Moore wanted to estimate the mean cholesterol level for all adult men living in Hartford... He…

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Q: The age when smokers first start from previous studies is normally distributed with a mean of 13…

A: Given,sample size(n)=22sample mean(x¯)=13.8standard deviation(σ)=2.1α=1-0.90=0.1α2=0.05Z0.05=1.645…

Q: The age of managers in particular industry is normally distributed with mean μ=35. A group of 30…

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Q: If x=1,340, find the P-value. (Round your answer to four decimal places.) P-value= Should Ho be…

A: The compressive strength is more than 1,300 KN/m².Population standard deviation

Q: How large of a sample is required for a to construct a 95% confidence interval around a mean with an…

A: It is given that  Standard deviation, σ = 95 Margin of error, E = 3

Q: A popular weight loss program claims users will lose weight each month. Linda samples 25 dieters and…

A: We have given that,  Sample mean (x̄) = 10 pounds, standard deviation (s) = 2 pounds and sample size…

Q: Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She…

A: Given mean of 5.9 standard deviation of 3.4.

Q: The average number of calories in a sample of 50 regular bagels is 405. If the standard deviation is…

A:

Q: A random sample of 5 months in an urban area showed an average of 28 mail carriers were bitten by…

A: Here we need to construct a 95% confidence interval for the mean number of mail carriers who were…

Q: he average height of students at a school from an SRS of 12 students gave a standard deviation of…

A: Given: Sample size, n=12 Standard deviation, s=2.5 We need to construct a 95% confidence interval…

Q: Noise levels at various area urban hospitals were measured in decibels. The mean of the noise levels…

A: We have given that Sample size (n) = 81Sample mean (x̅) = 62.04Population Standard deviations (σ) =…

Q: The mean diastolic blood pressure for a random sample of 70 people was 96 millimeters of mercury.…

A: given data  n = 70 x¯ = 96σ = 1190% ci for μ.

Q: A random sample of 250 students at a university finds that these students take a mean of 15 credit…

A: Solution: From the given information, the 99% confidence interval for the mean credit hours is…