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 central limit theorem, what is the mean and standard deviation SD(y over bary)of the normal model of the distribution of the sample mean,y overbary?
d) What is the probability that the mean duration of these patients' pregnancies will be less than 272 days?
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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...
Assume that the duration of human pregnancies can be described by a normal model with mean 266 days and standard deviation 17 days. a) What percent of pregnancies should last between 275 and 290 days? b) At least how many days should the longest 20% of all pregnancies last? c) Suppose a certain doctor is currently providing prenatal care to 20 pregnant women. According to the Central Limit Theorem, what is the mean of the normal model of the distribution...
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...
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.)
The lengths of pregnancies are normally distributed with a mean of 272 days and a standard...
The lengths of pregnancies are normally distributed with a mean of 272 days and a standard deviation of 15 days. If 35 women are randomly selected, find the probability that they have a mean pregnancy between 271 days and 275 days..
2. The length of human pregnancies from conception to birth varies according to a normal distribution...
2. The length of human pregnancies from conception to birth varies according to a normal distribution with mean 272 days and standard deviation 19.5 days. (a) If one birth is selected at random, then find the probability the pregnancy lasted no more than 250 days. (15) (b) If 1000 births are randomly selected, then how many of the pregnancies would be expected to last no more than 250 days? ack to 3. (a) Referring to Problem 2, at least how...
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)...
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. Approximately what percentage of pregnancies lasts at least 298 days?
Solve applications involving probabilities and corresponding x-scores for a normal distribution The lengths of pregnancies are...
Solve applications involving probabilities and corresponding x-scores for a normal distribution The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 30 days. If 144 women are randomly selected, find the probability that they have a mean pregnancy between 266 days and 268 days
Human pregnancies days follow a normal distribution with a mean of 268 days and a standard...
Human pregnancies days follow a normal distribution with a mean of 268 days and a standard deviation of 11 days. We observe a particular female name “Kakwat” from a particular clan in North Africa. Her pregnancy was counted only for 250 days. Is Kakwat's pregnancy unusual? We consider it “unusual” if (chance of finding human pregnancy days less than “reported value of Kakwat”) < 0.001. A. pregnancy of Kakwat is unusual since P(pregnancy days < 250 ) < 0.001 B....
/53.) Length of pregnancies The length of human preg- nancies from conception to birth varies according...
/53.) Length of pregnancies The length of human preg- nancies from conception to birth varies according to a distribution that is approximately Normal with mean 20-122 266 days and standard deviation 16 days. For each part, follow the four-step process. (a) At what percentile is a pregnancy that lasts 240 days (that's about 8 months)? (b) What percent of pregnancies last between 240 and 270 days (roughly between 8 months and 9 months)? (c) How long do the longest 20%...
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.)
2. The length of human pregnancies from conception to birth varies according to a normal distribution with mean 272 days and standard deviation 19.5 days. (a) If one birth is selected at random, then find the probability the pregnancy lasted no more than 250 days. (15) (b) If 1000 births are randomly selected, then how many of the pregnancies would be expected to last no more than 250 days? ack to 3. (a) Referring to Problem 2, at least how...
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)...
Solve applications involving probabilities and corresponding x-scores for a normal distribution The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 30 days. If 144 women are randomly selected, find the probability that they have a mean pregnancy between 266 days and 268 days
/53.) Length of pregnancies The length of human preg- nancies from conception to birth varies according to a distribution that is approximately Normal with mean 20-122 266 days and standard deviation 16 days. For each part, follow the four-step process. (a) At what percentile is a pregnancy that lasts 240 days (that's about 8 months)? (b) What percent of pregnancies last between 240 and 270 days (roughly between 8 months and 9 months)? (c) How long do the longest 20%...
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