Suppose that the lengths of pregnancies are normally distributed with a mean of 270 days and a standard deviation of 14 days. If a child is born in the lower 4.5% of this distribution is considered to be premature, how many days must a pregnancy last for a child to not be considered premature? (Round to the nearest day.)

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: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.5…

A:

Q: Suppose that the heights of adult men in the United States are normally distributed with a mean of…

A:

Q: acturer knows that their items have a normally distributed lifespan, with a mean of 7.6 years, and…

A: Let the left area of the normal curve is denoted by -z* and the right area of the curve by z*. Now,…

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

A: From the provided information, Mean (µ) = 116 Standard deviation (σ) = 14 X ~N (116, 14)

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

A:

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

A: As per central limit theorem, the standard normal z score of sample mean x is defined as…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7 years,…

A: Given that  μ=7σ=2.1 sample size is n=20 Let 4% of the time their mean life will be less than 'a'…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.7…

A:

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.3…

A: Draw the normal curve and shade the area of 0.10 to the left of z. Use excel formula…

Q: Ex. 13. If the probability of a defective bolt is 0.2, find (i) mean (ii) standard deviation for the…

A: Givenp=0.2sample size(n)=400

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: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: We have given that.   X~N( μ , ?^2 )   μ =0.25 , ? =0.05   Z-score =( x - μ )/?

Q: manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.9 years,…

A: Given mean of 9.9 years, and standard deviation of 1.9 years.

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: These babies will have a mass of less than how many pounds?

A: Given that masses of newborns are normally distributed with a mean of 6.6 lbs. and a standard…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.2…

A:

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…

A: Mean = 144 Standard deviation = 27

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.