Use the given data to find the 95% confidence interval estimate of the population mean u. Assume that the population has a normal distribution. Give your answers to 2 decimal places IQ Scores of professional athletes Sample size n 30 Mean I = 105 Standard deviation s = 14 田くく

Q: A random sample of 95 automobiles traveling on an interstate showed an average speed of 60 mph and a…

A: Given: Sample size (n) = 95 Sample mean (x̄) = 60 mph Sample standard deviation (s) = 13.8 mph…

Q: How much money does the average professional hockey fan spend on food at a single hockey​ game? That…

A: See the handwritten solution

Q: The prices of used books at a large college bookstore are normally distributed. If a sample of 23…

A: From the provided information, Sample size (n) = 23 Sample mean (x̅) = $27.50 Sample standard…

Q: A random sample of 130 observations produced a mean of x¯=33.6 from a population with a normal…

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Q: The mean scores of a random sample of 17 students who took a special test is 83.5. If the standard…

A: Given;sample size(n)=17sample mean(x¯)=83.5sample s.d.(s)=4.1for confidence level 95%, significance…

Q: Use the given data to find the 95% confidence interval estimate of the population mean . Assume that…

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Q: A 95% confidence interval for the mean hours freshmen spent on social media per day was calculated…

A: Solution: From the given information, the 95% confidence interval for the mean hours freshmen spent…

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with a…

A: Following information is given: standard deviation = 30 minutes sample size = 75

Q: A sample of 50 is taken from a population where the population standard deviation is known to be 6.…

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Q: Use the given data to find the 95% confidence interval estimate of the population mean 14 Assume…

A: A confidence interval for the population mean is computed by, CI = x¯±tcsn x¯ = 103 n = 10 df = n -…

Q: Provide an appropriate response. How much money does the average professional hockey fan spend on…

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Q: A machine produces nails whose lengths are (normally distributed with mean u cm and standard…

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Q: The heights of American adult males are normally distributed with a mean of 177 cm and a standard…

A: We need to get the data by using formula P(mean-standardDeviation< x <  mean+standardDeviation…

Q: The standard deviation of the population of IQ Scores is standardized to be 15 points. Calculate the…

A: (a) Obtain the standard error of the mean for the sample of size of 81. The standard error of the…

Q: Use the given data to find the 95% confidence interval estimate of the population mean μ. Assume…

A: Given: n=10x¯=103s=12

Q: Use the given data to find the 95% confidence interval estimate of the population mean μμ. Assume…

A: The summary of the statistics is, The degree of freedom is, Critical value: By using the t-tables,…

Q: A production engineer collected a sample of 14 parts to measure their weights. The sample mean was…

A: Given that, n= 14, mean =8.48kg, sigma=0.79kg We have to find 95% lower confidence bound.

Q: 13) The number of daily passengers riding in a local Sunshine Cab is assumed to be normally…

A: (a) As the population standard deviation is known, we will use z distribution. At 99% confidence…

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Given: n=12 s=17

Q: Based on a sample of 80 textbooks at the store, you find an average of 58.24 and a standard…

A: The best estimate which is given for a population parameter is known as "point estimate". As from…

Q: has a sample mean foot length of 27.5 cm. Assuming that the standard deviation of foot lengths for…

A: We have given that  Sample size n = 64  Sample mean x = 27.5  Standard deviation σ= 2 95% confidence…

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with a…

A: Given data,n=75σ=30x=90z-value at 95% confidence is Zc=1.96Upper Confidence limit=?

Q: The mean and standard deviation of the maximum loads supported by 60 cables are 11.09 tons and 0.73…

A: Given: Sample mean = 11.09 Sample standard deviation s = 0.73 sample size n = 60 100(1-α)%…

Q: Karen wants to advertise how many chocolate chips (in grams) are in each Big Chip cookie at her…

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Q: Find the 99% confidence interval for the variance and standard deviation for the time it takes state…

A: Given :   Sample size (n)=23 Sample standard deviation (s)=5.3 Confidence interval (c.I)=99%…

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: The random variable Score follows normal distribution. The sample size is 30. The sample mean is 82.…

Q: A YouTuber can expect to earn between 50 to 80 pesos per 1,000 views at 95% confidence level.…

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Q: Suppose that the waiting times for patients at a local hospital are normally distributed with a…

A: Confidence interval is a range of values it contains the true population parameter with specified…

Q: A sample of 81 items is taken from a population with a standard deviation of 45 kilograms. The…

A: Given : Sample Size , n= 81 Sample Mean , x̄ =112 population standard deviation , σ =45

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with a…

A: Given: Sample size n = 75 Sample mean X = 90 Population standard deviation σ = 30 Formula Used:…

Q: A random sample of 40 students has a mean annual earnings of​ $3120 and assume that the population…

A: We want to find the 95% CI for population mean (μ)

Q: find the 95% confidence interval estimate of the population mean

A: We have given that  Sample size n= 30Mean = 104Standard deviation = 9

Q: Use the given data to find the 95% confidence interval estiate of the population mean ?μ. Assume…

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Q: Suppose that the waiting times for patients at a local hospital are normally distributed with a…

A: Given: n=75, x=90 and σ=30.   Since, population standard deviation is known, use z-test.

Q: A study of 25 professors showed that the average time they spent creating test questions was 16.5…

A: It is given that the sample size is 25 professors, the average time to creating test question is…

Q: Use the sample information x with a line on top=41, o=4, n=20 to calculate the following confidence…

A: Given that  Sample mean (x¯) = 41 Population standard deviation (σ) = 4  Sample size (n) = 20   We…

Q: Q2: Assume the population standard deviation o of the student height in survey is 9.48. Find the…

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Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

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Q: A random sample of 110 observations produced a mean of = 28.9 from a population with a normal…

A: Sample size = n = 110 Sample​ mean = x = 28.9 Standard deviation = σ = 4.47 We have to, a) Find a…

Q: A data obtained from a random sample has mean 68 and standard deviation 35. The value whose Z-score…

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Q: In a sample of 23, the mean is  x¯x¯ = 91.74 with a standard deviation of s = 9.87. Assuming the…

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Q: Suppose that the waiting times for patients at a local hospital are normally distributed with a…

A: Given,Standard deviation σ = 30Sample size n = 75Sample mean x¯ = 90

Q: A YouTuber can expect to earn between 50 to 80 pesos per 1,000 views at 95% confidence level.…

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

A: Given dataSample size (n) = 22Meanx̅ = sample mean = 18.9s = sample standard deviation =…

Q: Find the 95% confidence interval for the variance and standard deviation for the time it takes state…

A: Given  n=21 , s=5.2

Q: Use the given degree of confidence and sample data to construct a confidence interval for…

A: Given information- Sample size, n = 30 Degree of freedom, df = 30-1 = 29 Sample mean, x-bar = 95…

Q: Suppose that the waiting times for patients at a local hospital are normally distributed with known…

A: Given data,σ=30n=75x=90z-value at 95% confidence is Zc=1.96Margin of error(E)=?

Q: aries of 125 college graduates who have taken a statistics course have a mean of $42,486 and a…

A: Here it is given that - Total number of samples(n) = 125 Sample mean (x¯) = 42486 Sample standard…

Q: A random sample of 90 observations produced a mean of x = 34.6 from a population with a normal…

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