The duration of pregnancy in a particular human population (in a district of South India) is...
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The duration of pregnancy in a particular human population (in a district of South India) is approximately Normally distributed with μ = 272.3 days and σ = 8.8 days. In the following questions, assume that this distribution is exact.
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What proportion of pregnancies last between 265 and 279 days?
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What proportion of pregnancies last over 288 days?
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What durations give the quartiles of the distribution of pregnancy durations for this population?
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Homework Answers
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The duration of pregnancy in a particular human population (in a
district of South India) is...
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 268 days and standard deviation 11 days. Answer the following questions. a) What percentage of pregnancies should last between 265 and 275 days? b) At least how many days should the longest 30% of all pregnancies last? c) Suppose a certain obstetrician is currently providing prenatal care to 60 pregnant women. Let y overbary represent the mean length of their pregnancies. According to the...
The length of a human pregnancy is approximately normally distributed with mean LaTeX: \muμ=266 days and...
The length of a human pregnancy is approximately normally distributed with mean LaTeX: \muμ=266 days and standard deviation LaTeX: \sigmaσ=16 days. A random sample of 36 pregnancies is obtained. What is LaTeX: \sigma_{x-bar}σ x − b a r? Choose the best answer. Group of answer choices 1.57 36 .44 2.67
The length of a human pregnancy is approximately normally distributed with mean LaTeX: \muμ=266 days and...
The length of a human pregnancy is approximately normally distributed with mean LaTeX: \muμ=266 days and standard deviation LaTeX: \sigmaσ=16 days. A random sample of 36 pregnancies is obtained. What is LaTeX: \sigma_{x-bar}σ x − b a r? Choose the best answer. Group of answer choices 1.57 36 .44 2.67
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 269 days and standard deviation 18 days. Answer the following questions a) What percentage of pregnancies should last between 265 and 280 days? % (Round to one decimal place as needed.)
Use R instead of a calculator for Questions 5 and 6. Please attach the R commands...
Use R instead of a calculator for Questions 5 and 6. Please attach the R commands output and graphs that you used to answer the question. The R output alone is not an answer to the question. Please write a sentence or two to properly answer each question. Assume that the distribution of the duration of human pregnancies can be approxi- mated with a normal distribution with a mean of 266 days and a standard deviation of 16 days (a)...
Assume the random variable X is normally distributed with mean μ= 50 and standard deviation σ...
Assume the random variable X is normally distributed with mean μ= 50 and standard deviation σ 7. Find the 87th percentile. The 87th percentlie is Round to two decimal places as needed.) The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips (a) What is the probability that a randomly selected bag contains between 1100 and 1400 chocolate chips, inclusive? (b) What...
(Round to four decimal places as needed) The lengths of a particular animal's pregnancies are approximately...
(Round to four decimal places as needed)
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean u = 265 days and standard deviation o = 12 days. (a) What proportion of pregnancies lasts more than 280 days? (b) What proportion of pregnancies lasts between 262 and 268 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 259 days? (d) A "very preterm" baby is one whose gestation period is less...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean μ=283 days and σ=17 days. (a) What is the probability that a randomly selected pregnancy la...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean μ=283 days and σ=17 days. (a) What is the probability that a randomly selected pregnancy lasts less than 277 days? The probability that a randomly selected pregnancy lasts less than 277 days is approximately 0.3632 (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. (Round to the...
math
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean μ=269 days and standard deviation σ=12 days.(a) What proportion of pregnancies lasts more than 290 days?(b) What proportion of pregnancies lasts between 254 and 278 days?(c) What is the probability that a randomly selected pregnancy lasts no more than 248 days?(d) A "very preterm" baby is one whose gestation period is less than 242 days. Are very preterm babies unusual?
Assume that the duration of human pregnancies can be descibed by a Normal model with mean...
Assume that the duration of human pregnancies can be descibed by a Normal model with mean 267 days and standard deviation 13 days. a) What percentage of pregnancies should last between 270 and 281 days? b) At least how many days should the longest 30% of all pregnancies last? c) Suppose a certain obstetrician is currently providing prenatal care to 46 pregnant women, Lety represent the mean length of their pregnancies. According to the Central Limit Theorem, what's the distribution...
Assume that the duration of human pregnancies can be described by a normal model with mean 269 days and standard deviation 18 days. Answer the following questions a) What percentage of pregnancies should last between 265 and 280 days? % (Round to one decimal place as needed.)
Use R instead of a calculator for Questions 5 and 6. Please attach the R commands output and graphs that you used to answer the question. The R output alone is not an answer to the question. Please write a sentence or two to properly answer each question. Assume that the distribution of the duration of human pregnancies can be approxi- mated with a normal distribution with a mean of 266 days and a standard deviation of 16 days (a)...
Assume the random variable X is normally distributed with mean μ= 50 and standard deviation σ 7. Find the 87th percentile. The 87th percentlie is Round to two decimal places as needed.) The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips (a) What is the probability that a randomly selected bag contains between 1100 and 1400 chocolate chips, inclusive? (b) What...
(Round to four decimal places as needed)
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean u = 265 days and standard deviation o = 12 days. (a) What proportion of pregnancies lasts more than 280 days? (b) What proportion of pregnancies lasts between 262 and 268 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 259 days? (d) A "very preterm" baby is one whose gestation period is less...
Assume that the duration of human pregnancies can be descibed by a Normal model with mean 267 days and standard deviation 13 days. a) What percentage of pregnancies should last between 270 and 281 days? b) At least how many days should the longest 30% of all pregnancies last? c) Suppose a certain obstetrician is currently providing prenatal care to 46 pregnant women, Lety represent the mean length of their pregnancies. According to the Central Limit Theorem, what's the distribution...
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