1. If the length of pregnancies are normally distributed with a mean of 268 days and...
1. If the length of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days
a.What percentage of pregnancies will last between 255 and 280 days?
b. what percentage will last less than 260 days?
c. what percentage will last more than 290 days?
2. for the above question what number of days will seperate the top 15% of days from the bottom 85%
3. If the distribution of test scores are skewed to the left and I take numerous samples of 45 from these scores, what will the distribution of the averages of these test scores follow.
4. what are the requirements in order to use the normal distribution to replace the binomial?
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1. If the length of pregnancies are normally distributed with a
mean of 268 days and...
1. The lengths of pregnancies are normally distributed with a mean of 268 days and a...
1. The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a) Find the 80th percentile of pregnancy length. b) Find the pregnancy length that separates the upper 30% c) Find the pregnancy lengths that separate the middle 80% d) Find the percent of pregnancies that are less than 260 days. e) Find the percent of pregnancies that are between 250 and 280 days
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?
The length of a single pregnancy is normally distributed with a mean of 268 days and...
The length of a single pregnancy is normally distributed with a mean of 268 days and standard deviation 7 days. a. b. c. d. What is the probability that a single pregnancy lasts between 255 and 280 days? What is the probability that a single pregnancy lasts longer than 275 days? 15% of single pregnancy babies have been born at or before what day? What is the probability that exactly 1 of a sample of 4 women with a single...
1) The lengths of pregnancies of humans are normally distributed with a mean of 268 days...
1) The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting less than 250 days. 2) The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting more than 300 days. 3) An airline knows from experience that the distribution of the number...
The lengths of pregnancies in a small rural village are normally distributed with a mean of...
The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 15 days. What percentage of pregnancies last fewer than 295 days? PIX < 295 days) = % Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted. Submit Question
The lengths of pregnancies are normally distributed with a mean of 268 days and a standard...
The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 309 days or longer. b. If the length of pregnancy is in the lowest 4%, 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. Click to view page 2 of the table. a. The probability...
6.2.31 Question Help The lengths of pregnancies are normally distributed with a mean of 268 days...
6.2.31 Question Help The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 309 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, Click to view,page 2 of the table a....
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...
The lengths of pregnancies in a small rural village are normally distributed with a mean of...
The lengths of pregnancies in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 13 days. A distribution of values is normal with a mean of 269 and a standard deviation of 13. What percentage of pregnancies last beyond 276 days? P(X > 276 days) = ____% Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores...
6.2.31 Question Help O The lengths of pregnancies are normally distributed with a mean of 268...
6.2.31 Question Help O The lengths of pregnancies are normally distributed with a mean of 268 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. Click to view page 2 of the...
The length of a single pregnancy is normally distributed with a mean of 268 days and standard deviation 7 days. a. b. c. d. What is the probability that a single pregnancy lasts between 255 and 280 days? What is the probability that a single pregnancy lasts longer than 275 days? 15% of single pregnancy babies have been born at or before what day? What is the probability that exactly 1 of a sample of 4 women with a single...
1) The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting less than 250 days. 2) The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting more than 300 days. 3) An airline knows from experience that the distribution of the number...
The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 15 days. What percentage of pregnancies last fewer than 295 days? PIX < 295 days) = % Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted. Submit Question
The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 309 days or longer. b. If the length of pregnancy is in the lowest 4%, 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. Click to view page 2 of the table. a. The probability...
6.2.31 Question Help The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 309 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, Click to view,page 2 of the table a....
6.2.31 Question Help O The lengths of pregnancies are normally distributed with a mean of 268 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. Click to view page 2 of the...
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