Concerns about climate change and CO2 reduction have initiated the commercial production of blends of biodiesel (e.g., from renewable sources) and petrodiesel (from fossil fuel). Random samples of 41 blended fuels are tested in a lab to ascertain the bio/total carbon ratio.    If the true mean is .9550 with a standard deviation of 0.0050, within what interval will 95 percent of the sample means fall? (Round your answers to 4 decimal places.)    The interval is from  _to _

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: Given information Mean = 116 Standard deviation = 14  between 102 and 130

Q: QUESTION 2 A dietitian is looking into the average weight of middle school & High school students in…

A: We have given that,  Population mean (μ) = 47.47, population standard deviation (σ) = 14.67 and…

Q: Suppose a population is known to be normally distributed with a mean, equal to 116 and a standard…

A: Given dataMean = 116Standard deviation = 14Probability that population would be between 116 and 130…

Q: Consider a data set with a mean raw score of 25 and a variance of 2.25.  If P( y < X < 28 ) =…

A:

Q: The height of a species is normally distributed with a mean 39.2 and a standard deviation 3.3. What…

A: It can be interpreted that, the mean height at the population level, i.e., μ=39.2 and the SD of the…

Q: If the Standard Deviation of a data set is 2.1, what is the variance of that data set? State your…

A:

Q: 4. A normally distributed population has a population mean p = 21 and standard deviation o = 4. What…

A: Z = x - μσ~N(0,1)

Q: To answer question 18, Please use the approproate stats table attached. Do not use a software. Q18:…

A: Q18 a. The middle 50% will fall between the first quartile and the third quartile. For variable A,…

Q: Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone…

A: Population mean μ=7.9 Sample mean x-=8.1 Sample size(n)=2424 Sample variance s2=0.25 We have to test…

Q: f X is normally distributed with a mean of 42 and a standard deviation of 4, determine the interval…

A: given data, normal distribution,μ=42σ=4CI=0.95α=1-0.95=0.05

Q: Whenever someone compares experimental values to data in published journals and researches, which…

A: Whenever someone compares experimental values to data in published journals and researches, which…

Q: How many retired people should be sampled if we want to calculate with 92% confidence the true mean…

A: The provided information are: Confidence level = 92% Margin of error (E) = 0.8 Population standard…

Q: Suppose a population is known to be normally distributed with a mean, equal to 116 and a standard…

A: The percentage of the population would be between 116 and 144 is obtained below:It is given that the…

Q: Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone…

A: State the hypotheses.

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: Obtain the standard z-score for X equals 102. The standard z-score for X equals 102 is obtained…

Q: Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone…

A: Given Population mean μ=4.1, n=sample size=66, sample mean x̄=4.3, sample variance=s2=1, level of…

Q: Acid rain, caused by the reaction of certain air pollutants with rainwater, is a growing problem in…

A: sample size(n)=50 Mean(x)=3.6 standard deviation(s)=0.5 significance level(α)=0.05

Q: Concerns about climate change and CO2 reduction have initiated the commercial production of blends…

A:

Q: Find the value of the test statistic. Round your answer to three decimal places.

A: Population mean of ozone is μ=7.9 ppm  Sample size n= 24  with sample mean X̄ = 8.1 ppm  and sample…

Q: 1. In a frequency distribution, the last cumulative frequency is 500. Third quartile must lie in…

A: Hey, since there are multiple Question posted, we will answer first questions. If you want any…

Q: A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard…

A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: A population of scores has µ=44. In this population, a score of X= 40 corresponds to z= - 0. 50.…

A:

Q: Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone…

A: The test hypotheses are:Null hypothesis:H0: μ = 4.7.Alternative hypothesis:H1: μ ≠ 4.7.

Q: Pax World Balanced is a highly respected, socially responsible mutual fund of stocks and bonds.…

A: Given that, for Pax World Balanced : x¯ = 9.70% and s=13.95% and for Vanguard Balanced Index: x¯ =…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.