The lengths of pregnancies in a small rural village are normally distributed with a mean of 268.5 days and a standard deviation of 12.8 days. In what range would you expect to find the middle 50% of most pregnancies?

Q: After 5 points are added to each score in a sample, the mean is found to be M=45 . What was the…

A: Given data: c = 5 points are added to each score in a sample. New mean, M = 45 Let the original mean…

Q: Reading scores. The grade-level reading scores from a reading test given to a random sample of 12…

A: From the provided information, Sample size (n) = 12

Q: The rainfall in a town last year measured 31 inches. If the annual rainfall has a mean of 48.89…

A:

Q: When you use the standard deviation as a measure of variation, what is the reference point?

A: Standard deviation:The standard deviation indicates by how much each observation differs from a…

Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

A:

Q: Use either your graphing calculator or Table A.2. Round to 4 decimal places if necessary. The birth…

A: Given: Population mean μ=7.46 Population standard deviation σ=1.8 Consider X be the random variable…

Q: Find the standard deviation if the mean = 2, mode = 5, variance = 56 . Round your answer to three…

A: We have given that,  Mean (x̄) = 2 , mode (z) = 5 and variance        (s^2) = 56 Then,  We will find…

Q: An airplane manufacturer sells at most 1 airplanes per month. If the company is expected to sell…

A: Given  airplane manufacturer sells 0 or 1 airplanes per month. If the company is expected to sell…

Q: Find the mean, variance and standard deviation. round all answers to on decimal place.

A: The mean of the variable X obtained as given below: Here, X denote the observation.

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: The Z-score of a normally distributed random variable X, with mean µ and standard deviation σ at the…

Q: Human pregnancies are normally distributed with a mean of 267 days and a standard deviation of 15…

A: The mean is 267 days and the standard deviation is 15 days.

Q: The blood cholesterol levels of men age 55 to 64 are approximately Normal, with mean 222 milligrams…

A: We have given that Mean=mu=222 Standard deviation=sigma=27 X~Normal(mu=222,sigma=27)

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: GIVEN DATA, normal distribution μ=100σ=15we have to find out the indicated IQ score for the given…

Q: The mean amount of time it takes a kidney stone to pass is 16 days and the standard deviation is 5…

A: Given that  The mean amount of time it takes a kidney stone to pass is 16 days. (μ)=16 Standard…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Given data normally distributed with mean of 100 and standard deviation of 15.From the given graph,…

Q: Find the mean, variance and standard deviation. round all answers to on decimal place.

A: Solution: Suppose two dice rolled. Then, the sample space is Let X be the sum shown on the two…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Given, μ=100σ=15P(X>x)=0.65x=?

Q: o these calculations using Excel, a graphing calculator, or an app. Type the data in different…

A: The number of observations is 6.

Q: ind the percentage of area under a normal curve between the mean and the given number of standard…

A: The mean and standard deviation of the standard normal distribution are 0 and 1.

Q: Find the mean, variance and standard deviation. round all answers to on decimal place

A:

Q: is 6% is your standard deviation?

A: Given according to question Sample size(N)=? Confidence =95% Margin of error = 5% Now question says…

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of​ adults, and those…

A: Given,mean(μ)=100standard deviation(σ)=15

Q: Find the number of standard deviations from the mean. Round your answer to two decimal places.  The…

A: Given information: The annual snowfall in a town is distributed with mean 35 inches and standard…

Q: The mean yearly rainfall in Sydney, Australia, is about 137 mm and the standard deviation is about…

A:

Q: Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The…

A: The standard deviation of students lab measurements is 8. Juan repeats the measurement 2 times. That…

Q: If you buy one ticket everyday for 365 days, find the mean and standard deviation for the numbers of…

A:

Q: Find the mean, variance and standard deviation. round all answers to on decimal place.

A:

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Mean is 100 and standard deviation is 15.

Q: Circle the data values that are Within one Standard deviation of the Imean (9, 12, 16, 19, 24)

A: Given that  The data are X : 9 , 12 , 16 , 19 , 24

Q: In a study 10 people were given a test. The mean test score was 78.9 points. The standard deviation…

A: Given: Sample size n = 10 Sample mean X = 78.9 Sample standard deviation s = 5.2 Formula Used: X =…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: given data  normal distribution μ = 100σ = 15P(x>z) = 0.75x =?

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.