What is the confidence level for the interval X±1.645

Q: If you want to make a confidence interval for the mean with the TI-84, which of the following…

A: Given that,  The sample standard deviation(s) is known The function of Z-test is not correct because…

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

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Q: For a sampling distribution of n = 1500 and population proportion of 0.42 of those who prefer…

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Q: The critical value of t for a 95% confidence interval with df equals 108

A: Given:

Q: What is the confidence interval estimate of the population mean u? ]°F<µ<| 7°F (Round to three…

A: Given : sample standard deviation, s = 0.66 confidence level,c= 0.99 Sample Size, n = 104 Sample…

Q: If a 90% confidence interval for the mean is (75.3 to 80.9), we would reject H0 : = 70 in favor of…

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Q: Find the critical value zc necessary to form a confidence interval at the level of confidence shown…

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Q: If n = 230 and X = 184, construct a 99% confidence interval for the population proportion, p.Give…

A: Given data n = 230 x = 184 sample proportion

Q: A researcher wishes to estimate the  proportion of adults who have high speed internet access. what…

A: Given Information: Error (e) = 0.02 Confidence level = 90%  The z score at 90% confidence level is…

Q: Using the form p ̂ ±ME, express the confidence interval (0.870, 0.894).

A: The given confidence interval is,  (0.870, 0.894). The value of sample proportion is,

Q: If n = 100 and X= 35, construct a 90% confidence interval estimate fo SAS (Round to four decimal…

A: The value of z at a 90% confidence level is 1.645, which can be found by using the standard normal…

Q: If n = 180 and X = 144, construct a 90% confidence interval for the population proportion, p. Give…

A: Solution: From the given information, X=144, n=180 and the confidence level is 0.90. The sample…

Q: If n = 200 and X = 80, construct a 99% confidence interval estimate of the population proportion.…

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Q: Everything else being equal, a population with a higher mean yields a confidence interval that is…

A: As the formula for confidence interval is: CI=X±Zsn Where: X = Mean of the data's Z = Z-value…

Q: Find n for a 98% confidence interval for p with E = 0.017 using an estimate of p = 0.8. (Round up to…

A: Proportion = p = 0.8 Margin of Error = E = 0.017 Confidence Level = 98 Significance Level = α…

Q: If n=300 and X=120​, construct a 99​% confidence interval estimate for the population proportion.…

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Q: Identify the t-score for a 90% confidence interval if the sample size is 25. t = The answer isnt…

A: We have given that Confidence level (c) = 90% = 0.90 Significance level (α) = 1 - c = 1 - 0.90 =…

Q: Express the confidence interval 0.444<p<0.888 in the form p+ E.

A: Obtain the point estimate of the proportion.   The point estimate of the proportion is obtained…

Q: If n = 250 and X = 200, construct a 99% confidence interval for the population proportion, p. Give…

A: As given, n = 250 and x = 200.  It is asked to construct a 99% confidence interval for the…

Q: For a confidence level of 94% for a mean with n = 19, find the critical value t.Enter the answer to…

A: Given that, n = 19, c= 94% The degree of freedom is,

Q: What is the confidence interval for the population mean u? hg <p< hg (Round to one decimal place as…

A: Here use t critical value for finding interval because sigma is unknown

Q: If n = 330 and X = 264, construct a 95% confidence interval for the population proportion, p. %3D…

A: From the provided information, Confidence level = 95% Sample size (n) = 330, x = 264 Sample…

Q: A 95% confidence interval forp is given as (0.34,0.66). How large was the sample used to construct…

A: Formula for the sample size needed to estimate a population proportion is

Q: A 95% confidence interval for a population mean was reported to be 152 to 160. If o = 15. what…

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Q: Find the corresponding x value, its standard uncertainty, w,, and the 95% confidence interval.…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: The following confidence interval gives a range of likely values for the average weight of all…

A: The above confidence interval gives a range of likely values for the average weight of all American…

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A: The random variable is adults who have​ high-speed Internet access. It follows standard normal…

Q: FIND t a n = 15 for the 98% confidence interval for the mean.

A: Provided information that, n=15 Alpha (α)=1-0.98=0.02 α/2=0.01

Q: Express the confidence interval 0.222 <p<0.666 in the form p±E. p±E= +]

A: Given data, lower limit=0.222 upper limit=0.666 express in form of (p+-E)

Q: What is the value of tα/2 for a sample of size n=39 at the 90% level of confidence?

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Q: What is the confidence interval for the population mean p? kg<u< kg (Round to one decimal place as…

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Q: If n = 280 and X = 224, construct a 99% confidence interval for the population proportion, p. Give…

A: Given: X=224n=280 CI=99% Formula: P¯±zα/2P^1-P^n

Q: A 95% confidence interval for is I D. (Round to one decimal place as needed.)

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Q: How many people should I poll to guarantee the actual error on qn is less than e, with 90%…

A: Given we dont know p, we use p = 0.5 to get a conservative value of the sample size as for p =0.5,…

Q: If n = 220 and X = 176, construct a 95% confidence interval for the population proportion, p. Give…

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Q: If appropriate, construct a 99.9% confidence interval for the ounce milkshakes sold at fast-food…

A: Data  504,450,399,613,608,700,472,510,642,591,375,580

Q: If n=550 and X = 440, construct a 90% confidence interval. Give your answers to three decimals <p<

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Q: Nearly one half of americans aged 25 to 29 are unmarried.  How large a sample is necessary to…

A: The formula for the sample size is as follows:

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

A: The independent sample t-test is used when we want to estimate/compare the mean(s) of an independent…

Q: For a confidence level of 88% for a proportion, find the critical value Z.Enter the answer to 2…

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Q: If n = 300 and X = 75, construct a 95% confidence interval estimate for the population proportion.…

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Q: If n=400 and X=120​, construct a 90​% confidence interval estimate for the population proportion.…

A: Solution: Given information: n= 400 Sample size  X= 120 Success p^=Xn=120400=0.30 Sample proportion…

Q: The 98 percent upper confidence limit for the population mean a daly sale would be? Round answer to…

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Q: A 95% confidence interval for u is ( H D.

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Q: Create a 85% confidence interval for a population mean from a sample of size 65 with sample mean x =…

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Q: Round to three decimal places. For a confidence level of 99%, find the critical z

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Q: How many people should I poll to guarantee the actual error on pN is less than e with 90%…

A:

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A: Given information: Margin of error(E)=0.03. Confidence level= 90%. α=1-0.90  =0.10 Zα2=Z0.102…

Q: If n=400 and X=80​, construct a 90​% confidence interval estimate for the population proportion.…

A:

Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.