Question

Question 1: The length of human pregnancies from conception to birth varies according to a distribution...

Question 1: The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with a mean of 266 days and standard deviation of 16 days.

  • What percent of pregnancies last less than 240 days?
  • What percent of pregnancies last between 240 days and 270 days?
  • How long do the longest 20% of pregnancies last?

Question 2: A federal report finds that a lie detector test given to truthful persons have a probability of 0.2 of suggesting that the person is deceptive. A company asks 12 job applicants to take a lie detect test.  Suppose that all 12 applicants answer truthfully.

  • What is the probability that exactly one is being deceptive?
  • What is the probability that at most one is being deceptive?
  • What is the mean and standard deviation of this distribution?
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The length of the human pregnancies from conception to birth varies according to an approximately normal...
The length of the human pregnancies from conception to birth varies according to an approximately normal distribution with mean 266 days and standard deviation 16 days. (a) What percentage of pregnancies last less than 270 days? (b) What percentage of pregnancies last longer than 282 days? (c) What percentage of pregnancies last between 240 to 270 days? (d) How long do the longest 20% of pregnancies last?
The length of human pregnancies from conception to birth varies according to a distribution that can...
The length of human pregnancies from conception to birth varies according to a distribution that can be modeled by a normal random variable with mean 265 days and standard deviation 15days. Question 1. What percent of pregnancies last less than 240 days?  Note that the answer is requested as a percent. Use 2 decimal places in your answer. ANSWER: 4.78% Question 2. What percent of pregnancies last between 240 and 270 days? Note that the answer is requested as a percent....
The length of human pregnancies from conception to birth varies according to a distribution that can...
The length of human pregnancies from conception to birth varies according to a distribution that can be modeled by a normal random variable with mean 269 days and standard deviation 17 days. A) What percent of pregnancies last between 240 and 270 days? Note that the answer is requested as a percent. Use 2 decimal places in your answer. B) The longest 20% of pregnancies last at least how many days? (round to the nearest whole day) days.
The length of human pregnancies from conception to birth varies according to a distribution that is...
The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 261 days and standard deviation 12 days. Use a normal z-table to answer all questions below. If not,your answers may be marked as incorrect due to rounding issues. (a) What proportion of pregnancies last less than 270 days (about 9 months)? (Use 4 decimal places) (b) What proportion of pregnancies last between 240 and 270 days (roughly between 8 months...
The length of human pregnancies from conception to birth varies according to a distribution that is...
The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with a mean of 266 days and a standard deviation of 16 days. a) What is the median pregnancy length? b) What is the interquartile range for this distribution?
(1 point) The length of human pregnancies from conception to birth varies according to a distribution...
(1 point) The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 266 days and standard deviation 16 days. A. Find the probability that the average pregnancy length for 7 randomly chosen women exceeds 270 days. (Use at least five decimals of accuracy in your answer) Probability = B. Find the probability that the average pregnancy length for 27 randomly chosen women exceeds 270 days. (Use at least five decimals...
The length of human pregnancies from conception to birth approximately follow a normal distribution with a...
The length of human pregnancies from conception to birth approximately follow a normal distribution with a mean of 266 days and a standard deviation of 16 days. What proportion of pregnancies last between 240 and 270 days What proportion of all pregnancies will last more than 270 days 
 What proportion of all pregnancies will last less than 270 days 
 Very premature pregnancies are defined to last less than 224 days. What proportion of 
pregnancies are very premature pregnancies? 
 Using the...
The length of human pregnancies from conception to birth a very‘s according to a distribution that...
The length of human pregnancies from conception to birth a very‘s according to a distribution that is approximately normal with mean 266 days in standard deviation 16 days a study in rolls a random sample of 36 pregnant women what is the probability that the average pregnancy exceeds 272 days
1. The length of human pregnancies varies according to a distribution that is approximately normal with...
1. The length of human pregnancies varies according to a distribution that is approximately normal with mean 266 days and standard deviation 16 days. a) Sketch a normal curve on which the mean and standard deviation are correctly located. (It is easiest to draw the curve first, locate the inflection points, then mark the horizontal axis.) b) How long are the longest 2.5% of pregnancies? c) What percentage of human pregnancies are longer than 266 days? d) What percentage of...
A study reported that the length of pregnancy from conception to birth is approximately normally distributed...
A study reported that the length of pregnancy from conception to birth is approximately normally distributed with mean = 272 days and standard deviation σ = 9 days. Let Φ be the cdf of the standard normal distribution, express the following results in terms of Φ. (a) (5 pts) What proportion of pregnancies last longer than 280 days? (b) (5 pts) A pregnancy is considered full-term if it lasts between 252 days and 298 days. What proportion of pregnancies are...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT