If a school district takes a random sample of 71 Math SAT scores and finds that the average is 460, and knowing that the population standard deviation of Math SAT scores is intended to be 100. Find a 99% confidence interval for the mean math SAT score for this district. < µ <

Q: In a sample of 226 Americans, the mean annual sugar consumption was 148 pounds with a standard…

A: The sampling distribution of a sample mean follows a normal distribution with the mean converging…

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Q: An article presents the results of a study in which the weights of 295 eggs from 27 week-old…

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Q: Suppose that the population standard deviation of students score is 20. what is the sample size so…

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Q: Use these data and a population standard deviation of 1.11 to construct a 98% confidence interval to…

A: The sample of 36 women's who had babies in the hospital during the past year is taken. The…

Q: Health Care Knowledge Systems reported that an insured woman spends on average 2.3 days in the…

A: a) Let μ1 is defined as the population mean of insured woman spends number of days in hospital for…

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

A: Given,sample size(n)=64sample mean(x)=90standard deviation(s)=7degrees of…

Q: If a school district takes a random sample of 80 Math SAT scores and finds that the average is 421,…

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Q: If a school district takes a random sample of 63 Math SAT scores and finds that the average is 488,…

A: Given information Sample size (n) = 63 Sample mean x̅ = 488 Population standard deviation σ = 100…

Q: A tire producer wants to test whether the mean diameter of the tires produced on a given day equals…

A: Given Information: Sample size (n) = 48  Mean Diameter (u) = 36.4 inches Standard Deviation (s) =…

Q: If a school district takes a random sample of 53 Math SAT scores and finds that the average is 488,…

A: Given Information: Sample size n=53 Sample mean x¯=488 Population standard deviation σ=100

Q: A random sample of 25 four-person families visiting New Orleans was selected, and the average amount…

A: From the provided information, Sample size (n) = 25 Sample mean (x̅) = $724.00 Sample standard…

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Q: If a school district takes a random sample of 75 Math SAT scores and finds that the average is 433,…

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Q: A sample of 225 elements from a population with a standard deviation of 75 is selected. The sample…

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Q: A sample of 35 different payroll departments found that employees worked an average of 240.6 days a…

A: Given that  Sample size (n) =35 Employed worked an average of 240.6 days a year x¯ = 240.6 days…

Q: Suppose that the population standard deviation of student scores is 20. What will be the sample size…

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Q: Suppose a random sample of 100 individuals is taken and that average wage for that sample is $870…

A: It is given that the mean is 870 and the population standard deviation is 300.

Q: If a school district takes a random sample of 75 Math SAT scores and finds that the average is 433,…

A: It is given that the mean is 433 and the population standard deviation is 100.

Q: The mean amount of the 812 mortgages taken out in a city in the past year must be estimated. Based…

A: Given : Population S.D (σ) = 20000 Confidence Level = 95% Margin of error (E) = 2000

Q: If a sample of 25 fish from my pound has mean weight 157 grams with a standard deviation of 8.3…

A: Given information Sample size(n) = 25 Sample mean = 157g Population standard deviation (σ) = 9.4 g…

Q: If a school district takes a random sample of 80 Math SAT scores and finds that the average is 497,…

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Q: If a school district takes a random sample of 89 Math SAT scores and finds that the average is 497,…

A: From the provided information, Sample size (n) = 89 Sample mean (x̅) = 497 Population standard…

Q: A study of 100 apple trees showed that the average number of apples per tree was 2000.  The standard…

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Q: In order to help identify baby growth patterns that are unusual, we need to construct a confidence…

A: As from the above data we have, X¯= 40.6 cm.n( Sample size)=100Standard Deviation(s)=1.6 cm. We are…

Q: Health Care Knowledge Systems reported that an insured woman spends on average 2.3 days in the…

A: Given: n1=n2=16, x1=2.3, x2=1.9, s1=0.6, s2=0.3 The 99% confidence interval for the differences of…

Q: A large department store found that it averages 362 customers per hour. Assume that the standard…

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Q: A study by the department of education of a certain state was trying to determine the mean SAT…

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Q: If a school district takes a random sample of 89 Math SAT scores and finds that the average is 494,…

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Q: If a school district takes a random sample of 61 Math SAT scores and finds that the average is 425,…

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Q: Suppose that the amount of time teenagers spend playing computer games per week is normally…

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Q: According to a survey, the average times, in minutes, it took for Statistics students to complete…

A: Given data; Mean(x-bar) = 102 minutes Standard deviation (s) = 11 minutes Sample size (n) =16 As…

Q: In a sample of 15 small candles, the weight is found to be 3.72 ounces with a standard deviation of…

A: It is given that,Sample mean = 3.72 ounces.Sample standard deviation, s is 0.963 ounces.The sample…

Q: If a school district takes a random sample of 50 Math SAT scores and finds that the average is 47,…

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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…

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

A: Given that x bar =33.2.s.d =8.3,n=14,alpha=.05

Q: If a school district takes a random sample of 56 Math SAT scores and finds that the average is 488,…

A: Given information Sample size(n) = 56 Sample mean = 488 Population standard deviation (σ) = 100

Q: A sample from a normal population is given with mean 54 and the standard deviation 12. Find the…

A: Given : n = 25 x¯=54 S = 12

Q: A statistician chooses 27 randomly selected đates, and when examining the occupancy records of a…

A: It is given that Sample size n = 27 Sample SD s = 5.86 The critical values of Chi-square at df = (n…

Q: Find the 90% confidence interval for the variance and standard deviation of the ages of students at…

A: Confidence interval: The (1-α) % confidence interval for population standard deviation is given by:

Q: If a school district takes a random sample of 55 Math SAT scores and finds that the average is 422,…

A: It is an important part of statistics . It is widely used .

Q: A random sample of 40 students has mean annual earnings of $3120 and a standard deviation of…

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Q: If a school district takes a random sample of 61 Math SAT scores and finds that the average is 466,…

A: Find a 99% confidence interval for the mean math SAT score for this district.

Q: A food snack manufacturer samples 15 bags of pretzels off the assembly line and weighed their…

A: Here, sample mean is x-bar = 10.2, the sample standard deviation is s = 0.25 and sample size n = 15.…

Q: A recent study of 28 randomly selected employees of a company showed that the mean of distance they…

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Q: If a school district takes a random sample of 80 Math SAT scores and finds that the average is 442,…

A: Given that, Sample size n=80 Sample average x¯=442 Population standard deviation σ=100

Q: Suppose a random sample of 50 baksetball players showed the average height to be 78 inches. Also…

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Q: Suppose a sample of 9 customers spends an average of $200 with a standard deviation $20 what is a…

A: Solution:   Given that, Mean x̄ = 200 Sample size n = 9 Standard deviation s = 20

Q: A sample of 30 NBA players had a sample mean of their heights as 80.5 inches. If the standard…

A: Given information Sample size n = 30 Sample mean x̅ = 80.5 inches Population standard deviation σ =…