A population is known to have a standard deviation of 7.89. A sample of 348 people are taken. The mean of the sample is 86. What is the upper bound of the 95% confidence interval? Write your answer to 4 decimal spaces.

Q: the mean is 146, and standard deviation is 35. A score of 251 is how many z-scores above the mean?

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Q: A researcher found a 95% confidence interval for the proportion of college students who believe in…

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Q: You are interested in finding a 95% confidence interval for the mean number of visits for physical…

A: Given,mean(x¯)=13.6standard deviation (s)=9.1918sample size(n)=10degrees of…

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

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Q: The winning   score in 5 high school basketball games was recorded. If the sample mean is 62.3…

A: Given information- Sample size, n = 5 Mean, x-bar = 62.3 Sample standard deviation, s = 11.0 Since…

Q: etic test has a mean of 60 and a standard deviation of 20. The vocabulary test has a mean of 60 an a…

A: A z-score is known as the standard score that determines how much the data point deviates from the…

Q: A student scored 51 on a math achievement test for which the mean was 36 and the standard deviation…

A: From given data we have  Mean = 36 standard deviation = 6 X=51

Q: find the margin of error of a 99% confidence interval for the mean score of all student

A: It is given that  Sample mean = 93 Sample standard deviation, s = 7 Sample size, n = 30

Q: How do I answer this question? Noise levels at various area urban hospitals were measured in…

A: We have given that,  Sample size (n) = 84 Sample mean (x-bar) = 61.2 Sample standard deviation (s) =…

Q: compare the given values. The tallest living man at one time had a height of 264 cm. The shortest…

A: Mean=173.67Population standard deviation=8.72

Q: Jim and Pat are both taking Calculus. Jim scored 92 on a test in his class. The average on the test…

A: To find: Who actually did better? Include the Z-scores as part of the answer.

Q: 5 students were given a test. The average and standard deviation of the 5 scores were found to be…

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Q: Decide if the following statement is true or false. Explain why. It is possible to have a standard…

A: We need to decide if the given statement that " It is possible to have a standard deviation of -2…

Q: Suppose you compute a 99% confidence interval. What will happen to the confidence interval if you…

A: To find: Change in confidence interval if it is decreased from 99% to 94%

Q: What raw score does he need to get the certificate

A: Given that Mean = 83 And SD = 3.2

Q: George got a 75 on a math test. The reliability of the math test was .85 and the standard deviation…

A: Confidence Interval: A confidence interval, refers to the probability that a population parameter…

Q: Thirty randomly selected students took the calculus final. If the sample mean was 74.2 and the…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 74.2 Standard deviation (s) =…

Q: Find the 95%95% confidence interval for the average value of net income given that sales are…

A: From the given information, a regression analysis has been performed to estimate the model. Here,…

Q: A population has mean 27 and standard deviation 12 . What is the data value that has a z-score of -2…

A: Given data, Mean=27 sd=12 z=-2 x=?

Q: SAT scores have a mean of 1026 and a standard deviation of 209. ACT scores have a mean of 20.8 and a…

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Q: Jake needs to score in the top 10% of his class to earn a physical fitness certificate.  The class…

A: Solution: The class mean is μ= 78, and the standard deviation is σ= 5.5.

Q: An IQ test has a mean of 100 and a standard deviation of 15. An elite engineering company wants to…

A: Let X be the IQ test score of engineer. The mean is μ=100. And a standard deviation σ=15. Assume…

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

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Q: Construct the 99% confidence interval for the difference when 3-47688, -318.32, -42.11, -2680, -19,…

A: Test hypothesisNull Hypothesis H0: μ1=μ2Alternative Hypothesis Ha: μ1≠μ2For group 1 Sample size…

Q: Construct a 90% confidence interval for the mean when x̅=50 and there are 31 observations. Suppose…

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Q: Use z scores to compare the given values. The tallest living man at one time had a height of 248 cm.…

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Q: you take a sample in equal 25 of test scores from a population. The sample mean is 38, and the…

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Q: the mean is 146, and standard deviation is 35. You can infer that 97.72% of female students have…

A: Introduction: For a normally distributed random variable, X with mean μ, and standard deviation σ,…

Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?

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Q: Use z scores to compare the given values. The tallest living man at one time had a height of 227 cm.…

A: Given data,μ=172.36σ=5.76

Q: You have a sample of 48 randomly selected Vancouverites. On average (the sample mean), the people in…

A: Given information: Minimum = 367 Maximum = 484 x¯=425, n=48

Q: On a standardized test, Sara had a score of 93, which was exactly 2 standard deviations above the…

A: The normal distribution in the center is generally denser and basically less dense at tails. There…

Q: Use the t-table or any statistical tool and report the t-score that you multiple by the standard…

A: Excel: The confidence level is 95%. Sample size is 5. Degrees of freedom is 5-1= 4. The t-score can…

Q: In a study 10 people were given a test. The mean test score was 78.9 points. The standard deviation…

A: Given: Sample size n = 10 Sample mean X = 78.9 Sample standard deviation s = 5.2 Formula Used: X =…

Q: The mean of 7 consecutive integers is 10. What is the standard deviation?

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Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Let X: the length of trout caught in Pyramid LakeGiven that,Mean length(μ) = 19 inches.Sample…

Q: A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form…

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