Calculus and Above

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26. Using the T distribution and constructing a 95%
26. Using the T distribution and constructing a 95% confidence interval with a sample size of 18, the critical (or table) value of t is Group of answer choices a. 1.753 b. 2.947 c. 2.898 d. 2.11027. U… read more
Keith Pelletier
Master's Degree
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Statistics question: A 95% confidence interval for the mean
Statistics question: A 95% confidence interval for the mean of a population is (45.3, 46.2). Which of the following is NOT A TRUE statement: A. It is assumed that the confidence interval was obtained … read more
Keith Pelletier
Master's Degree
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A doctor wants to estimate the HDL cholesterol of all​ 20-
A doctor wants to estimate the HDL cholesterol of all​ 20- to​ 29-year-old females. How many subjects are needed to estimate the HDL cholesterol within 3 points with 99 % confidence assuming sigma equ… read more
Sandhya_sharma
Master's Degree
Master's Degree
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1. A random sample of 92 observers produced a mean X = 25.8
1. A random sample of 92 observers produced a mean X = 25.8 and a standard deviation s = 2.6. a) Find a 95% confidence interval for 11. b) Find the 90% confidence interval for Jl c) Find the 99% confi… read more
Ryan
Bachelor's Degree
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2. The mean diameter of a ball bearing produced by a certain
2. The mean diameter of a ball bearing produced by a certain manufacturer is 0.80 cm with a population standard deviation of 0.03 cm. A sample of 36 ball bearings is randomly selected from a productio… read more
Stevewh
Teacher
Bachelor's Degree
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You answered similar questions previously but the data has
You answered similar questions previously but the data has slighly changed. Can you please provide details as to how you worked the problem? Thx #1 Find the sample size needed to estimate the percenta… read more
Chirag
Master's Degree
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FOR GURU2009 ONLY: Assignment number 1: Needed right now! 1. In
FOR GURU2009 ONLY: Assignment number 1: Needed right now! 1. In the standard normal distribution, the standard deviation is always: 2. The area under the standard normal curve is: 3. If Mary gets a 90… read more
Chirag
Master's Degree
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Consider a normal population with µ = 25 and σ = 8.0. (A)
Consider a normal population with µ = 25 and σ = 8.0. (A) Calculate the standard score for a value x of 22. (B) Calculate the standard score for a randomly selected sample of 30 with = 22. (C) Explain… read more
Trigeoscal
College Math Professor
Master's Degree
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Please help with these 17 questions!! 1. Find the margin of error for the given values of c,s,and n. c=0.90,s=2.9,n=100 2. Construct the confidence interval for the population mean u. c=0.98,x=8.4,s=0… read more
Chirag
Master's Degree
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For questions needing a probability table, please use the table
For questions needing a probability table, please use the table with the value that starts 0.5000 not software or another table. I am having trouble with these last 7 questions. Please show your work … read more
Scott
Master's Degree
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Calculate the standard error. (Round your answers to 4 decimal places.) Standard Error (b) n = 50, π = .20 (c) n = 100, π = .10 (d) n = 500, π = .005 Find a confidence interval for μ assuming that eac… read more
dhouse1940
Retired
Master's Degree
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Pg.431 1)The mean of the sampling distribution of means is
Pg.431 1)The mean of the sampling distribution of means is equal to the mean of the population. T-F, and why or why not? 2) In the formula for the Confidence Interval for the Mean, if the Confidence C… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
Find the margin of error for the given values of c, s, and
Find the margin of error for the given values of c, s, and n. C=0.95, s=2.3, n=49 E=_________ (Round to three decimal places as needed) Construct the confidence interval for the population mean µ. C= … read more
Stevewh
Teacher
Bachelor's Degree
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16. In a survey of 630 males ages 18-64, 391 say they have
16. In a survey of 630 males ages 18-64, 391 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and com… read more
Sandhya_sharma
Master's Degree
Master's Degree
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Question 1 Assume youve administered a worker satisfaction
Question 1 Assume you've administered a worker satisfaction test to a random sample of 25 workers at your company. The test is purported to have a population standard deviation or σ of 4.50. The test … read more
Chirag
Master's Degree
10,329 satisfied customers
Use the one-mean z-interval procedure with the sample mean,sample
Use the one-mean z-interval procedure with the sample mean,sample size,population standard deviation, and confidence level given below to find aconfidence interval for the mean of the population,μ fro… read more
Sandhya_sharma
Master's Degree
Master's Degree
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a) From the information given here, determine the 95% confidence
a) From the information given here, determine the 95% confidence interval estimate of the population mean. Xbar = 100 σ = 20 n = 25 b) Repeat part (a) with xbar = 200. c) Repeat part (a) with xbar = 5… read more
Chirag
Master's Degree
10,329 satisfied customers
1. a) From the information given here, determine the 95% confidence
1. a) From the information given here, determine the 95% confidence interval estimate of the population mean. Xbar = 100 σ = 20 n = 25 2. b) Repeat part (a) with xbar = 200. c) Repeat part (a) with xb… read more
Chirag
Master's Degree
10,329 satisfied customers
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