The Sydney Airport Commission set a performance target of 25 minutes for the time taken for passengers to claim their luggage at domestic terminals. In order to monitor performance a study was conducted by taking a random sample of 200 passengers disembarking from Sydney airport. If the study found a p-value of 0.5 what was the sample mean time taken by passengers to claim their luggage? (Your answer should be correct to one decimal place.)

Q: To test the intelligence of 10th class boys and girls in a Higher Secondary School, a sample of 83…

A: We have given that  Sample size n1=95 , n2=83 Sample mean xbar1 =29.91  xbar2 =40.92 Standard…

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A: The mean for the test is, μ=55 The standard deviation is σ=11 Consider that the bottom 20% of…

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Q: On a statistics exam, the mean score was 80 and there was a standard deviation of 7. If a student's…

A: Given data, μ=80σ=7If x=92z=?

Q: On a scale designed to measure attitudes toward immigration, two college classes scored as follows.…

A: Question 8: Class A: The value of mean for class A is, Mean=∑ixiN=4+6+2+1+1+16=156=2.5 Thus, the…

Q: what is the z-score of a value of 32 of a set A, given that the set has a mean of 24 and a standard…

A: The answer is found in step-2

Q: For a population with mean 80 and standard deviation 6, what is the z-score corresponding to X = 68…

A: Given :Population mean u=80Standard deviation σ=6X=68

Q: One sample has n = 4 scores with SS = 100 and a second sample has n = 8 with SS = 140. What is the…

A:

Q: For a population with a mean of 75 and a standard deviation of 12, what proportion of sample means…

A: Given, Mean μ = 75 Standard deviation σ = 12 sample size n = 16

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: An analysis of a data set (N = 16) has revealed that its standard deviation (SD) of 2. Then, what is…

A: GivenN=16standard deviation(SD)=2

Q: A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the…

A: Step-by-step procedure to obtain descriptive statistics using EXCEL Add-Ins: Go to Data>Data…

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A: We need to prepare Hypothesis statements

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A:

Q: Given a normally distributed data set whose mean is 35 and whose standard deviation is 6.3, what…

A: The random variable X follows normal distribution. The population mean is 35. The population…

Q: A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the…

A: After enable the MegaStat Add-In into EXCEL, enter the given data in EXCEL sheet.

Q: he mean height of all adult American males is 69 inches (5 ft 9 in). A researcher wonders if young…

A: a) The hypothesized mean is 69 inches.

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

A:

Q: In order to estimate the average electric usage per month, a sample of 64 houses was selected and…

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Q: what is the z-score of a value of 28 of set A, given that the set has a mean of 26 and a standard…

A: The mean is 26 and the standard deviation 3.0.

Q: With a mean of 40, and SEM = 5, what values would encompass 99% of scores (assume sigma is known)?

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Q: The Cpa practice advisor reports that the mean preparation fee for 2017 federal income tax returns…

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Q: A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from…

A:

Q: If a sample has a mean of 48 and a standard deviation of 3.2, what is the value in the set that…

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Q: The Sydney Airport Commission set a performance target of 24 minutes for the time taken for…

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Q: A sample of n = 100 scores is selected from a population with μ = 80 with σ = 20. On average, how…

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Q: on an intelligence quotient test with a mean score of 100 and a standard variation of 15, patrick…

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Q: In a normally distributed data set of how long customers stay in your store, the mean is 43.5…

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Q: The following data was collected during the Framingham Heart Study. Is there a statistically…

A: Let men and women are the sample1 and sample 2 respectively.

Q: With a μ = 45 and a σ = 10, would a score of X = 50 be considered a central score (near the middle)…

A: Given, μ = 45 and a σ = 10

Q: In order to set rates, an insurance company is trying to estimate the number of sick days that full…

A:

Q: Nabisco claims that Chip Ahoy Cookies have an x=28.67 per cookie with a SD=2.67. Assuming this…

A: Here, the sample standard deviation is given as 2.67.

Q: The distance traveled by a commuter in the city, has a mean of 28 miles and a standard deviation of…

A: Given,mean(μ)=28standard deviation(σ)=6sample size(n)=500

Q: THE SCORES ON THE SAT MATH HAD A MEAN OF 431 AND A STANDARD DEVIATION OF 117. What percent of…

A:

Q: The data set has size 90. Approximately how many observations lie within two standard deviations…

A: The Empirical Rule states that 99.7% of data observed following a normal distribution lies within 3…

Q: The following data was collected during the Framingham Heart Study. Is there a statistically…

A: The sample size is sufficiently large. So, can use the standard normal distribution.

Q: A livestock company reports that the mean weight of a group of young steers is 1172pounds with…

A: a) It is given that the mean weight of a group of young steers follows normal distribution with mean…

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A:

Q: According to Chebyshev's Teorem, at least what percentage of snake lengths are within K= 2.9…

A: The Chebyshev’s rule states that, for any quantitative data set and any real number greater than k,…

Q: A successful basketball player has a height of 6 feet 11 ​inches, or 211 cm. Based on statistics…

A:

Q: The mear was 80 and the Standard deviation was 4, Kawhi scored 5, 8o his z-Score was more than one…

A:

Q: A researcher was interested in comparing the amount of time spent watching television by women and…

A: A researcher was interested in comparing the amount of time spent watching television by women and…

Q: A sample of n = 16 scores is selected from a population with μ = 80 with σ = 20. On average, how…

A: From the provided information, it is known that

Q: A group of students estimated the length of one minute without reference to a watch or clock, and…

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Q: In order to set rates, an insurance company is trying to estimate the number of sick days that full…

A: 53. The provided information is  The  population standard deviation is  σ=2.8 days α=0.05 The…

Q: The General Social Survey  asked a sample of 1298 people how much time they spent watching TV each…

A: From the given information,

Q: On an Intelligence Quotient test with a mean score of 100 and a standard deviation of 15, Patrick…

A: The mean is μ=100 and standard deviation is σ=15. The score is x=85 so it follows:…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.