An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. Suppose that the mean income is found to be $26.4$⁢26.4 for a random sample of 44754475 people. Assume the population standard deviation is known to be $8.4$⁢8.4. Construct the 98%98% confidence interval for the mean per capita income in thousands of dollars. Round your answers to one decimal place. ____ lower Endpoint _________ upper Endpoint

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Q: An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city…

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Q: 2. A recent study of 25 students showed that they spent on average of $18.35 for gasoline per week.…

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Q: A sample of 47 Charleston County households have a mean income of $32,346 with a standard deviation…

A: The sample size is 47, sample mean is $32346, and sample standard deviation is $8571. The confidence…

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A: We are going to find 99% confidence interval by finding the critical value

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Q: An admission officer of a small liberal arts college wishes to compare the mean admission test…

A: Given: n1= 15 ,x̄1= 495.0 ,s1= 55.0 n2= 17 ,x̄2= 545.0 ,s2= 50.0 At 95.0 % confidence level with…

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Q: Find 95% confidence interval for the population mean, if the sample size is 40, the sample mean is…

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Q: A sample of 10 adult elephants had an average weight of 12,881 pounds. The standard deviation for…

A: Given,sample size(n)=10sample mean(x)=12881standard deviation(s)=27degrees of…

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A: From the Standard Normal Table, the z value for 90% level is 1.645.

Q: Based on this, construct a 90% confidence interval for the true population mean watermelon weight

A: It is given that Sample size n = 20 Sample mean M = 51 Population SD = 4.3 The critical value of Z…

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A: Confidence interval C.I= Point estimate +- Margin of error(ME) Confidence interval C.I=( lower…

Q: You measurê 33 textboöks' weights, and find they have a mean weight of 44 ounces. Assume the pa…

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A: Introduction: The 100 (1 – α) % confidence interval for the population standard deviation, σ, is the…

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Q: In a survey, 19 people were asked how much they spent on their child's last birthday gift. The…

A: From the provided information, Sample size (n) = 19 Sample mean (x̄) = $46 Sample standard deviation…

Q: measure 31 turtles' weights, and find they have a mean weight of 34 ounces. Assume the population…

A: given datan=31X¯ =34σ=7.3CI=0.90α=1-0.90=0.10confidence interval for the given data =?

Q: You wish to estimate the current mean birth weight of all newborns in a certain region, to within 1…

A: Given : Margin of error, E = 116 =0.0625 pound confidence level = 95% α = 0.05 zα2 = z0.052 zα2 =…

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Q: . Estimate the mean with an approximate 95% confidence interval. The magazine estimates the true…

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Q: The line of best fit through a set of data is y=29.267+0.881x According to this equation, what is…

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Q: A random sample of 49 drivers used on average 753 gallons of gasoline per year. The standard…

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: a sample of 25 automobiles shows that the mean price was $20,500 with standard deviation of $2,500.…

A: Givensample size = n = 25Mean price = $20,500Standard deviation = $2500 The distribution is normal.…

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

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Q: .Find 95% confidence interval for the population mean, if the sample size is 64, the sample mean is…

A: It is given that Sample size n = 64 Sample mean M = 508 Sample SD s = 28 The critical value of t at…

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Q: You measure 50 turtles' weights, and find they have a mean weight of 60 ounces. Assume the…

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

Q: construct a 99% confidence interval for the true population mean dog weight.

A: here given , You measure 22 dogs' weights, and find they have a mean weight of 57 ounces. Assume the…

Q: You measure 47 watermelons' weights, and find they have a mean weight of 63 ounces. Assume the…

A: It is given that the, We measure 47 watermelons' weights and find they have a mean weight of 63…

Q: ou measure 32 backpacks' weights, and find they have a mean weight of 79 ounces. Assume the…

A: Solution: Given information: n= 32 Sample size  x= 79 ounces Sample mean σ=10.2 ounces Population…

Q: A Gallup survey of 2324 adults (at least 18 years old) in the U.S. found that 417 of them have…

A: The formula of the confidence interval is,

Q: In a survey, 373 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=373Mean(x)=36.85standard deviation(σ)=19.05Confidence level = 80%