Find a 98% confidence interval for the population standard deviation o.

Q: Salaries of 39 college graduates who took a statistics course in college have a​ mean, x of $63,300.…

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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: A random sample of 100 NBA women players had a mean height of  x¯=69.5in  and a standard deviation…

A: The sample size is 100, sample mean is 69.5, and sample standard deviation is 3.3.

Q: A sample of 26 observations is taken from a normal distribution with unknown mean, the sample mean…

A: Answer: From the given data, Sample size(n) = 26 mean (x¯) = 12.6 Standard deviation(σ) = 2.5 95%…

Q: Salaries of 33 college graduates who took a statistics course in college have a mean, x, of $69,000.…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: A sample of 42 observations is taken from a normal population with a standard deviation of 8. The…

A: Answer: From the given data, Sample size(n) = 42 Mean (X¯) = 45 Standard deviation(σ) = 8 99%…

Q: A random sample of 1818 American students had a mean height of 7070 inches with a standard deviation…

A: n1 = number of American students = 1818 x1 = Mean of American students = 70.70 inches s1 = standard…

Q: The average zinc concentration recovered from a sample of measurements taken in 40 different…

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Q: Construct a 95% confidence interval for µ, where n=81, sample mean = 28, and the standard deviation…

A: Given information Sample size n = 81 Sample mean x̅ = 28 Population standard deviation σ = 12…

Q: Ро 18

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Q: Suppose pizza delivery times are normally distributed. The population standard deviation is 7…

A: Given: Population standard deviation σ = 7  minutes. Sample mean X = 36 minutes. Sample size n = 20…

Q: Salaries of 47 college graduates who took a statistics course in college have a​ mean, x​, of…

A: We have given that,  Sample size (n) = 47, sample mean (x̄) = 68300 and population standard…

Q: Find Ta/2 for a 90% confidence interval and a sample size of 30.

A: 90% confidencve inetrval for Sample size : n = 30Critical value of T = ?

Q: Find a 90% confidence interval for the mean of a normal distribution if population variance is 4 and…

A: Given CL = 0.90 Population variance, σ2=4 Sample size, n=8 9,14,10,12,7,13,11,12

Q: The total of individual weights of garbage discarded by 16 households in one week has a mean of 35.7…

A: Given information- Sample size, n = 16 Significance level, α = 0.01 Sample mean, x-bar = 35.7 lbs…

Q: The standard deviation for a population is sigma = 7.05 . A random sample selected from this…

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Q: The average zinc concentration recovered from a sample of measurements taken in 40 different…

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Q: The mean IQ score of a sample of 61 students selected from a high school is 93. Suppose the standard…

A: Construct the 99% confidence interval for the population mean The 99% confidence interval for the…

Q: Salaries of 33 college graduates who took a statistics course in college have a mean, x, of $68,000.…

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Q: Construct the confidence interval for the population mean  c=0.95, x=8.7 standard deviation=0.8 and…

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Q: The mean weight loss of n = 16 grinding discs after a certain length of time in a mill is 3.42 grams…

A: The objective of this question is to construct a 99% confidence interval for the true mean weight…

Q: A study of 100 apple trees showed that the average number of apples per tree was 1000. The standard…

A: Computation of critical value: 1-α=0.92α=0.08α2=0.041-α2=0.96 The critical value of z-distribution…

Q: A sample of 28 observations is taken from a normal distribution with unknown mean, the sample mean…

A: n= 28x¯ = 10.6σ = 2.899% ci for μ = ?

Q: A random sample of 25 individuals finds a sample mean value of 18 and sample standard deviation of…

A: Given information- Sample size (n) = 25 Mean x̅ = 18 Standard deviation (s) = 6 Significance…

Q: A sample of 22 adults attending a country fair determined that the mean age was 35 given that the…

A: Answer: From the given data, Sample size(n) = 22 mean (x¯) = 35 Standard deviation(σ) = 10 95%…

Q: construct a 95% confidence interval for the mean number of years of secondary education for employed…

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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: Find the critical value used for a 95% confidence interval for standard deviation from a sample of…

A: Given information- Confidence level, c = 0.95 So, significance level, α = 0.05 Sample size, n = 22…

Q: what is the 90% confidence interval of the standard deviation where n= 20 and s=40.5

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Q: Determine the sample size necessary to estimate a population mean within 1 with 90% confidence given…

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Q: The standard deviation for a population is sigma = 14.8 . A sample of 21 observations selected from…

A: Here the population standard deviation is given. So, we need to use z critical value in order to…

Q: Find a 99% confidence interval for the population mean age of the Smurfs, if a sample of 50 smurfs…

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Q: A random sample of newborn baby boys were weighed. x = 6.7 lb s = 1.3 lb n = 79 1. What is the point…

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Q: 72 samples are randomly selected from a normal distribution. The sample mean observed is 148. The…

A: Answer: From the given data, Sample size (n) = 72 Sample mean (x-) = 148 Population standard…

Q: A sample of 20 body temperatures resulted in a mean of 98.3° and a standard deviation of .24°. Use…

A: From the provided information, Sample size (n) = 20 Mean (x̄) = 98.3 Standard deviation (s) = 0.24…

Q: Find a 98% confidence interval for the true mean length of eyelashes, if a sample 33 eyelashes has a…

A: Let we define µ be the true mean length of eyelashes. A sample 33 eyelashes has a mean length of…