est takes an automobile dealer to sell a Ferrari 458. A random sample of 50 cars had a mean time on the dealer's lot of 54 days. Assume the population standard deviation to be 6.O days. 1. Find the best point estimate of the population mean. DAYS. (Round answer to two decimal places) 2. Find the margin of error for the 95% confidence level. DAYS. (Round answer to two decimal places)

Q: (A2) if the standard error of the mean is 10 for N=12, what is the standard error of the mean for…

A: Given (A2): SE=10 for N=12 (A2): SE= 50, for N=25

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A: Given ME=0.02 Standard deviation=0.07 CI =99%

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Q: Florida has an average temperature of 80 degrees Fahrenheit with a standard deviation of 3.5…

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Q: The Internal Revenue Service reports that the mean federal income tax paid in a recent year was…

A: From the given information, μ=8040σ=5000n=100

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Q: When computing the standard deviation, does it matter whether the data are sample data or data…

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Q: For the United States, the mean monthly Internet bill is $32.79 per household (CNBC,  January 18,…

A: Given  μ=32.79 n=50, x̄=30.63, σ=5.60

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A: Determine the value of sample size n. The value of sample size n is obtained as shown below: Use…

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Q: An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees…

A: From the provided information, Sample size (n) = 200 Sample mean (x̅) = $34000 Population standard…

Q: The monthly earnings of a group of business students are normally distributed with a standard…

A: Given that  Margin of error =E =132 Population standard deviation =532 93% confidence level.

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A: The paired t-test is used when: the sample sizes are equal. two samples are independent but the…

Q: A home furnishings store that sells bedroom furniture is conducting an end-of-month inventory of the…

A: Given: Significance level=α=0.99,Margin of error=E=100,Satnadrad deviation=σ=200.

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A: Given information- Significance level, α = 0.05 Population mean, μ = 404 grams Sample size, n = 41…

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Q: The monthly earnings of a group of business students are normally distributed with a standard…

A: Given Standard deviations=532 Margin of error=132 At 93% confidence level the z is 1.81

Q: A scientist has read that the mean birth weight, μ, of babies born at full term is 7.3 pounds. The…

A: Given that a scientist has read that the mean birth weight, μ, of babies born at full term is 7.3…

Q: The manager of a grocery store has taken a random sample of 100 customers. The average length of…

A: Solution: Let X be the waiting time. From the given information, n=100, x-bar=3.1 minutes and σ= 0.5…

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A: Given For the first question μ=50000σ=3500   For the second question  μ=50σ=6

Q: Recently, a random sample of 25-34 year olds was asked, "How much do you currently have in savings,…

A: Solution  Saving  Frequency (f)  Midpoint(x)  x2 fx fx2 0 - 199 337 99.5 9900.25 33531.5…

Q: A college admissions officer takes a simple random sample of 81 entering freshman. The admissions…

A: (a). Identify the parameter that is estimated by the admissions officer: The sample size is n = 81.…

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Q: After deducting grants based on need, the average cost to attend the University of Southern…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: A medical researcher is interested in the prenatal care received by pregnant women in inner cities.…

A: We have given that  Sample size n=20 , sample mean =4  s=1 , 95%confidence.

Q: The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine…

A: The population standard deviation is 92 hours.

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Q: - A large on-demand video streaming company is designing a large-scale survey to determine the mean…

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Q: A certain test preparation course is designed to improve students' SAT Math scores. The students who…

A: Given information:  SAT Math score for students who took the prep coursex¯1=550σ1=35.8n1=77 SAT Math…

Q: A medical investigation claims that the average number of infections per week at a hospital is 13.7.…

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Q: On the planet of Mercury, 4-year-olds average 3.2 hours a day unsupervised. Most of the unsupervised…

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Q: burban Families Watched An Average Of μ = 60 Minutes Of Television Each Day. Assuming That The…

A: Given dataMean µ = 60 minStandard deviation σ = 25 minutesa) proportion of 2-year-old children watch…

Q: B. You need to estimate the mean number of travel days per year for sales people.The mean of a small…

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Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

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Q: Watching TV: The 2012 general Social Survey asked a large number of people how much time they spent…

A: Solution: State the hypotheses. Null hypothesis: That is, the population standard deviation of TV…

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

A: Given information Hypothesized mean µ = 19 inches Sample size (n) = 49 Mean x̅  = 18.5 inches…

Q: students are normally distributed with a standard deviation of 478 dollars. A researcher wants to…

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Q: Car Aircon claims that the average cost of car aircon installation and repairs is 11,000. A sample…

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Q: "On the Standford-Binet test, the mean IQ is 100. A class of 13 kindergarten pupils were tested with…

A: According to our policy we can answer only first three part for remaining please repost the…

Q: The mean work week for engineers in start-up companies is claimed to be about 59 hours with a…

A: Given Mean =59 Standard deviation =6 n=10

Q: A Trucking Company claims that the mean weight for their delivery trucks when they are fully loaded…

A:

Q: A public safety association suspects that long distance truck drivers are getting behind the wheel…

A: Given: Sample size = 50, Sample mean = 6 hours, Sample standard deviation = 2 hours.