The lengths of pregnancies in a small rural village are normally distributed with a mean of 266.9 days and a standard deviation of 15.4 days. In what range would you expect to find the middle 68% of most pregnancies? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places.

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5.8…

A: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5.8…

Q: At the shot put event the mean was a throw of 44.22 feet, with a standard deviation of 3.65 feet.…

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Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13.4…

A: The z-value is obtained Excel function “=NORMSINV(Probability)”. Output obtained from Excel is given…

Q: If a one-person household spends an average of $76 per week on groceries, find the maximum and…

A: Let the random variable X is the amount of money spent by one - person household. The random…

Q: The Mean height of the students of a certain college is 66" with a Standard deviation of 3 inches.…

A: Given that  μ = 66 , ? = 3 , n=2000 1 feet = 12 inches  5 feet = 60 inches

Q: Suppose the exam average in a class is 72% with a standard deviation of 3. What proportion of…

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Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.2…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.4…

A: Given, Mean = μ=11.4SD = σ=2.3Probability=0.02

Q: The heights of 1000 students are normally distributed with a mean of 174.5 centimeters and a…

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Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A: Given information- Population mean, µ = 262 days Standard deviation, σ = 17 days Significance level,…

Q: The scores on a test are normally distributed with a mean of 70 and a standard deviation of 14, find…

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Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.3…

A: Let "X" be the shortest lifespan of the item in years. Refer Standard normal table/Z-table,…

Q: When we compute a standard deviation, we are trying to get a measure of the average distance of…

A: Let us understand better by assuming X1, X2, ...., Xn be n data points. Then,…

Q: The weights of adult California Condors average 14.8lbs with a standard deviation of 3.25lbs.…

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Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14 years,…

A: It is given that the mean is 14 years and standard deviation is 2.2 years. The z-score for 0.04…

Q: The scores on a standardized test are approximately normal with a mean of 83 and a standard…

A: Let T be minimum score needed to be in top 8%

Q: A distribution of values is normal with a mean of 141.6 and a standard deviation of 44. Find P65,…

A: Given Information: Mean μ=141.6 Standard deviation σ=44 To find Percentile P65: Using a standard…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13.8…

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Q: The mean life of a battery is 55 hours with a standard deviation of 6 hours. The manufacturer…

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Q: A popular fashion magazine claims that the age of their subscribers is normally distributed with a…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.2…

A: Let "X" be the shortest lifespan of an item. Find z-score (z): Refer Standard normal…

Q: On a recent calculus exam, a class mean was 75 with a standard deviation of 3.4. Calculate the…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 3.4 Let X be a random variable…

Q: The monthly income from a particular occupation is normally distributed, with a mean of 3800 dollars…

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Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 15 years,…

A: From the provided information, Mean (µ) = 15 years Standard deviation (σ) = 3.9 years Let X be a…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.5…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: At one college GPAs are normally distributed with a mean of 2.55 and a standard deviation of 0.49.…

A: Empirical rule says that in a normal data set, virtually every piece of data will fall within three…

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 118…

A: Note: Please repost d subpart as i can answer only 3 subparts as per my policy. Given data,…

Q: The distribution of heights of men is approximately Normal with a mean of 69.2 inches and a standard…

A: Given information- Population mean, µ = 69.2 inches Population standard deviation, σ = 2.5 inches We…

Q: A nurse at a local hospital is interested in estimating the birth weight of infants. How large a…

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Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.6…

A: Solution: Let X be the lifespan. From the given information, X follows normal distribution with a…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.4…

A: The provided information is: Meanμ=12.40 Standard deviationσ=3.30   Consider that X is a random…

Q: The lengths of pregnancies in a small rural village are Normally distributed with a mean of 265 days…

A: Obtain the standard z-score for the random variable X equals 239 days. The standard z-score for the…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.9…

A:

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 119…

A: Given data,μ=119σ=16P(X≥160)=?

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 6 years,…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.9…

A:

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 121…

A: X follows a Normal distribution with mean = 121 and S.D = 19 Then z=(x-mean)/SD = (x-121)/19…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.1…

A: The z score can be calculated as: z=x-μσ The required z score that is associated with the top 3% can…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.7…

A: Let X denote the lifespan of items and it follows normal distribution with a mean of μ=10.7 years,…

Q: The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation…

A: Given,sample size (n)=50sample mean(μ)=268standard deviation (σ)=15

Q: Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of…

A: The random variable score follows normal distribution. The population mean is 55.         The…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.7…

A: It is given that the mean is 10.7 years and standard deviation is 3.4 years. The z-score for 0.02…

Q: The scores on a psychology exam were normally distributed with a mean of 64 and a standard deviation…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 11.1…

A: Given:- X~normal distribution meanμ=11.1 yearsstandard deviationσ=1.6 year   and PX≥x = 0.03   We…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.9…

A: Given,mean(μ)=4.9  yearsstandard deviation(σ)=1.2  years

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 121…

A: Here the systolic blood pressure of US adults is normally distributed with mean=121 and SD=21. Also…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5 years,…

A: Given information Population mean µ = 5 years Standard deviation σ = 0.6 years We have given that…

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 118…

A: The parameter {\displaystyle \mu } is the mean  or expectation  of the distribution (and also its…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.4…

A:

Q: The monthly income from a particular occupation is normally distributed, with a mean of 5000 dollars…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

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.