Assume that the number of days from conception to birth is normally distributed with a mean of 271 days and a standard deviation of 4 days. We want to calculate percentage of pregnancies last more than 34 weeks (238 days). What would be the z-score associated with 34 weeks (238 days)? O -8.2 O 127.2 8.2 -16.5 O 254.5

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

A:

Q: Solve and sketch the problem.  The length of time consumed in waiting for Angkas driver is normally…

A:

Q: What is the z score for 20 if mean =28 and stadnard deviation =6

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: Assume that the number of pieces per bag has a mean of 72 with a standard deviation of 1.use the…

A: We have to find given probability by using emperical rule...

Q: been reported that 73% of federal government employees use e-mail. If a sample of 225 al government…

A: According to the provided information, Sample size (n) = 225 Probability (p) = 0.73

Q: Elephants have the longest pregnancy of all mammals. suppose that for Asian elephants, the lenghts…

A: The objective of this question is to find the percentage of Asian elephant pregnancies that are…

Q: A distribution consists of three requencies 250, 300, 350 having neans 30, 15 and 20 and standard…

A: We have given that  Size N1=250 , N2=300, N3=350 Sample mean xbar1 =30 , x2=15 , x3=20 Standard…

Q: The length of human pregnancies from conception to birth follows a bell shaped distribution with…

A: Given that  The distribution followed a bell shaped distribution. Mean (μ) =266 days Standard…

Q: The lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation…

A:

Q: Vhich distribution is used to construct an interval estimate of a population standard deviation?

A: Which distribution is used to construct an interval estimate of a population standard deviation?

Q: Suppose that the time required to complete a 1040R tax form is normally distributed with a mean of…

A:

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

A:

Q: The length of human pregnancies from conception to birth follows a normal distribution with a mean…

A:

Q: A normal distribution of scores has the following: mean = 120 standard deviation = 20 What range of…

A: given data normal distribution μ = 120σ = 20 for middle 60%  range = ?

Q: What percent of the babies born within each gestation period have a low birth weight (under 5.5…

A: a. For 28 to 31 weeks  mean = 3.20 lb standard deviation= 1.02 lb PX < 5.5 =…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What…

A: Obtain the z-score for the random variable X equals 85. The z-score for the random variable X equals…

Q: this data has a mean of 7.2 .  5, 7, 9, 10, 5 Calculate the sample standard deviation of this…

A: Central tendency measures the central value of the data set. Mean is a measure of central tendency.…

Q: The mean deviation of the data(1 * :2,9,9,3,6,9,4 from the mean is 2.23 3.23 O 2.57 O 3.57 O

A:

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

A: we have to find given probability..

Q: Assume that the heights of women are normally distributed with a mean of 65.4 inches and a standard…

A: We have given that  Mean=μ=65.4 Standard deviation=σ=2.7 X~Normal(μ=65.4,σ=2.7)

Q: Scores on each section of the SAT exam are normally distributed with a mean of 485 and a standard…

A: Let X denote the Scores on each section of the SAT exam are normally distributed with a mean of…

Q: Women's heights are normally distributed with a mean of 63.7 inches and a standard deviation of 2.9…

A: Let X be the height of the women X is normally distributed with mean μ = 63.7 inches and standard…

Q: a population was normally distributed with a mean of 10 and standard deviation of 2. What…

A: Given data,Mean μ=10sd    σ=2P(X<12.5)=?

Q: Find the mean, the standard deviation and the Z scores corresponding to the minimum and maximum…

A: 2.3, 1.0, 2.1, 6.5, 2.8, 7.8, 1.7, 2.9, 4.4, 5.1, 2.0

Q: Leaf length of a type of flower, in cm, are Normally distributed. It is further given that 0.13 of…

A: The random variable denotes the leaf length of a type of flower in cm, and it is distributed…

Q: are normally distributed with a mean of 100 and a standard deviation of 15. What IQ is in the 90th…

A: Kwe have to find out given probabiity..

Q: The length in days of human pregnancies is known to be normally distributed with a mean of 266 days…

A: Mean(µ) = 266 Population Standard deviations (σ) = 16Sample size (n) = 50

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: Suppose the durations of human pregnancies follow a mound-shaped distribution with a mean of 266…

A:

Q: The MF exam has a population mean of 500 and a standard deviation of 200. What are the scores for…

A: Let X=MF exam scores We have given information, The population mean μ=500 And population standard…

Q: Suppose the test scores in a class are normally distributed with a mean of 70 and a standard…

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: The number of cars running a red light in a day, at a given intersection, possesses a distribution…

A: From the provided information, Mean (µ) = 3 Standard deviation (σ) = 1 X~N (3, 1)

Q: Steel rods are manufactured with a mean length of 28 centimeters. because because of variability in…

A: Answer:- Given, Mean, µ = 28  Standard deviation, σ = 0.06  Let, X = Length of the steel rods.  So,…