Use R instead of a calculator for Questions 5 and 6. Please attach the R commands...
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...
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...
I need help. PLEASE DONT USE THE STANDARD NORMAL DISTRIBUTION TABLE. use normalcdf as part of your answer. Thank you 8.1.19 Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u 212 days and standard deviation a 13 days. Complete parts (a) through () below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2), (a) What is the probability that...
is Question: 6 pts 2 of 15 (8 complete) Luppose the lengths of the pregnancies of a certain animal are approximately normally di d with mean 160 days and standard deviation 13 days. Complete parts (a) through below .) What is the probability that a randomly selected pregnancy lasts less than 155 days? The probability that a randomly selected pregnancy las less than 155 days is approximately (Round to four decimal places as needed) Interpret this probability Select the correct...
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 Select an answer 218 234 250 266 282 298 and Select an answer 218 234 250...
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...
Question Help Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean u 243 days and standard deviation a 15 days. Complete parts (a) through () below. (a) What is the probability that a randomly selected pregnancy lasts less than 237 days? The probability that a randomly selected pregnancy lasts less than 237 days is approximately(Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fillin the answer...
I need help. PLEASE DONT USE THE STANDARD NORMAL DISTRIBUTION TABLE. use normalcdf as part of your answer. Thank you 8.1.19 Question Help Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean = 212 days and standard deviation o 13 days. Complete parts (a) through (1) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (Rage 2). (c) What is the...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean - 123 days and standard deviation g = 13 days. Complete parts (a) through in below. (a) What is the probability that a randomly selected pregnancy lasts less than 118 days? The probability that a randomly selected pregnancy lasts less than 118 days is approximately (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the...
Question Help the l Complete parts (a) through (f) below (a) What is the probability that a randomly selected pregnancy lasts less than 144 days? The probability that a randomly selected pregnancy lasts less than 144 days is approximately(Round to four decimal places as needed.) Interpret this plobability, Select the correct choice below and filli the answer box within your choice. (Round to the nearest integer as needed.) OA if 100 pregnant indi duals were selected independentyfrom this population, we...