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 or less? What is probability that a random sample of 50 pregnancies has a mean gestation period of 260 days or less? What is the probability a random sample of size 15 will have a mean gestation period within 10 days of the mean?

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orchestra answered 1 year ago

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)...

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

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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...

Length of human pregnancies follows a normal distribution with a population mean of 266 days and...

Length of human pregnancies follows a normal distribution with a population mean of 266 days and a standard deviation of 16 days. A) 90% of pregnancies last between how many days? B) 60% of pregnancies last between how many days?

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

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The lengths of pregnancies are normally distributed with a mean of 266 days and a standard...

The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 307 days or longer. b. If the length of pregnancy is in the lowest 3%, then the baby is premature. Find the length that separates premature babies from those who are not premature.Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... a. The...

the length of a particular animals pregnancies are approximately normally distributed with a mean u=252 days...

the length of a particular animals pregnancies are approximately normally distributed with a mean u=252 days and standard deviation o=12 days a. what proportion of pregnacies last more than 267 days? b. what proportion of pregnancies lasts between 234 and 255 days? c. what is the probabilty that a randomly selected pregancy lasts no more than 237 days? d. a "very preterm" baby is one whose gestation period is less than 222 days. Are very preterm babies unusual?

The length of zebra pregnancies is normally distributed, with mean μ = 380 and standard deviation...

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Assume the duration of human pregnancies can be described by a Normal model with mean 266...

Assume the duration of human pregnancies can be described by a Normal model with mean 266 days and standard deviation 16 days. 1. What percentage of pregnancies should last between 270 and 280 days? 2. At least how many days should be the longest 25% of all pregnancies last? 3. Suppose a certain obstetrician is providing prenatal care to 60 pregnant women. According to the Central Limit Theorem, if we calculated sample means, what is the mean and standard deviation...

The lengths of human pregnancies are normally distributed with a mean of 268 days and a...

The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy lasts at least 300 days?

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