Suppose that human pregnancies have an average duration of 270 days and standard deviation of 14...

Suppose that human pregnancies have an average duration of 270 days and standard deviation of 14 days. Find the probability that a pregnancy lasts for

(a) Less than 270 days

(b) Less than 263 days

Solutions

Expert Solution

milcah answered 1 year ago

Next > < Previous

Related Solutions

The duration (in days) of 14 randomly selected space shuttle flights have a standard deviation of...

The duration (in days) of 14 randomly selected space shuttle flights have a standard deviation of 3.54 days. Construct the 99% confidence interval for the population variance and the population standard deviation.

1.) the length of human pregnancies has a mean of 266 days and a standard deviation...

1.) the length of human pregnancies has a mean of 266 days and a standard deviation of 16 days. find the probability that a randomly chosen pregnancy lasts between 260 and 270 days. 2.) find the 45th percentile of days for a human pregnancy. 3.) the number of chocolate chips in a bag of chips ahoy cookies has a mean of 1262 with a standard deviation of 118 chips. find the probability a random bag has over 1100 chocolate chips....

The length of human pregnancies is approximately normal distributed with mean =266 days and Standard Deviation...

The length of human pregnancies is approximately normal distributed with mean =266 days and Standard Deviation = 16 days ( 20 points ) . Exercise 8.1 What is the probability a randomly selected pregnancy lasts less than 260 days? Suppose a random sample of 20 pregnancies is obtained. Describe the sample distribution the sampling distribution of sample mean of human pregnancies. What is the probability that a random sample of 20 pregnancies has a mean gestation period of 260 days...

1) The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days and a standard deviation of 14 days.

1) The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days and a standard deviation of 14 days.In what range would you expect to find the middle 98% of most pregnancies?Between___ and ___ .If you were to draw samples of size 53 from this population, in what range would you expect to find the middle 98% of most averages for the lengths of pregnancies in the sample?Between ____ and _____. 2)...

The length of human pregnancies is approximately normally distributed with mean μ= 266 days and standard...

The length of human pregnancies is approximately normally distributed with mean μ= 266 days and standard deviation σ = 15 days. (a) What is the probability a randomly selected pregnancy lasts less than 262 days? (b) Suppose a random sample of 20 pregnancies is obtained. Describe the sampling distribution of the sample mean length of human pregnancies. (c) What is the probability that a random sample of 20 pregnancies has a mean gestation period of 262 days or less? (d)...

Length (in days) of human pregnancies is a normal random variable (X) with mean 266, standard...

Length (in days) of human pregnancies is a normal random variable (X) with mean 266, standard deviation 16. (It would be useful to sketch this normal distribution yourself, marking its mean and the values that are 1, 2, and 3 standard deviations below and above the mean. Click to compare your figure to ours) The probability is 0.95 that a pregnancy will last between ?218234250266282298 and ?218234250266282298 days. The shortest 16% of pregnancies last less than ?218,234,250,266,282,298 days. The probability...

Suppose the lengths of human pregnancies are normally distributed with muμequals=266266 days and sigmaσequals=1616 days. Complete...

Suppose the lengths of human pregnancies are normally distributed with muμequals=266266 days and sigmaσequals=1616 days. Complete parts (a) and (b) below. (a) The figure to the right represents the normal curve with mu equals 266μ=266 days and sigmaσequals=1616 days. The area to the leftleft of Upper X equals 240X=240 is 0.05210.0521. Provide two interpretations of this area. Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete...

The durations (in days) of 14 randomly selected space shuttle flights have a sample standard deviation...

The durations (in days) of 14 randomly selected space shuttle flights have a sample standard deviation of 3.54days. Assume that the durations in days is normally distributed, construct a 95% confidence interval for the population variance and standard deviation.

Suppose the guests at the hotel have an average weight of 180 with a standard deviation...

Suppose the guests at the hotel have an average weight of 180 with a standard deviation of 50 pounds. An elevator is designed to carry only 10 people with a maximum capacity of 2400 pounds. 5. What is the mean of the sample mean? 6. What is the standard deviation for the sample mean of the 10 people? (Use 2 decimals) 7. If 10 guest ride the elevator at one time, what is the probability that the elevator is overweight?...

Assume that the duration of human pregnancies can be described by a Normal model with mean...

Assume that the duration of human pregnancies can be described by a Normal model with mean 267 days and standard deviation 14 days. a) What percentage of pregnancies should last between 272 and 284 days? b) At least how many days should the longest 20%of all pregnancies last? c) Suppose a certain obstetrician is currently providing prenatal care to 60 pregnant women. Let y represent the mean length of their pregnancies. According to the Central Limit Theorem, what's the distribution...

Subjects