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a) Compute the mean and standard deviation of the andom variable x the number of smokers...
statistics question about smoking before 18 years of age According to an almanac, 70% of adult smokers started smokin...
statistics question about smoking before 18 years of ageAccording to an almanac, 70% of adult smokers started smoking before turning 18 years oh When technology is used, use the Tech Help button for further assistance. (a) Compute the mean and standard deviation of the random variable X, the number of smokers who started before 18 in 100 trials of the probability experiment (b) Interpret the mean.(c) Would it be unusual to observe 80 smokers who started smoking before turning 18 years old...
Find the mean, variance, and standard deviation of the binomial distribution with the given values of...
Find the mean, variance, and standard deviation of the binomial distribution with the given values of n and p. n = 121, p=0.32 The mean, H, is (Round to the nearest tenth as needed.) The variance, 02, is (Round to the nearest tenth as needed.) The standard deviation, o, is (Round to the nearest tenth as needed.) 47% of U.S. adults have very confidence in newspapers. You randomly select 10 US adults. Find the probably at the number of US...
Consider a population having a standard deviation equal to 9.96. We wish to estimate the mean...
Consider a population having a standard deviation equal to 9.96. We wish to estimate the mean of this population. (a) How large a random sample is needed to construct a 95% confidence interval for the mean of this population with a margin of error equal to 1? (Round your answer to the next whole number.) The random sample is units. (b) Suppose that we now take a random sample of the size we have determined in part a. If we...
Assume the random variable X is normally distributed with mean μ=50 and standard deviation σ=7. Compute...
Assume the random variable X is normally distributed with mean μ=50 and standard deviation σ=7. Compute the probability. Be sure to draw a normal curve with the area corresponding to the probability shaded. P(X>38)=________ (Round to four decimal places as needed.)
Math 11- MAC27 oh MAC20, you found the mean and standard deviation for X, the number...
Math 11- MAC27 oh MAC20, you found the mean and standard deviation for X, the number of dots facing up for your convenience, on the next page. we found that the mean is μ . 3.5 and the standard deviation is σ-1.7078 Now, suppose that instead of tossing one die and counting the number of dots facing up we toss Name when a die is rolled. You may want to pause and look over the solutions to MAC20. These are...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean H 141 days and standard deviation a (a) What is the probability that a randomly selected pr...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean H 141 days and standard deviation a (a) What is the probability that a randomly selected pregnancy lasts less than 137 days? The probability that a randomly selected pregnancy lasts less than 137 days is approximately (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 nearest...
.NEED ANSWER ASAP A.) B.) NEED ANSWERS TO A.) and B.) The mean and standard deviation...
.NEED ANSWER ASAP
A.)
B.)
NEED ANSWERS TO A.) and B.)
The mean and standard deviation of a random sample of n measurements are equal to 33.8 and 3.7, respectively. a. Find a 95% confidence interval for p if n = 144. b. Find a 95% confidence interval for u if n=576. c. Find the widths of the confidence intervals found in parts a and b. What is the effect on the width of a confidence interval of quadrupling the...
Suppose the longths of the pregnancies of a certain animal are approximately normally distributed with mean...
Suppose the longths of the pregnancies of a certain animal are approximately normally distributed with mean 184 days and standard deviation 16 days. Complete parts(a) through) below. a) What is the probability that a randomly selected pregnancy tests less than 179 days? The probability that a randomly selected pregnancy lasts less than 179 days is approximately (Round to four decimal places as needed.) Interpret this probability Select the correct choice below and Round to the nearest Integer needed) in the...
Question 4 10 pts X is a normal random variable with unknown mean o=5. and standard...
Question 4 10 pts X is a normal random variable with unknown mean o=5. and standard deviation (a) "Find the margin of error Ein a 95 percent confidence interval for je corresponding a random sample of size n = 16. (b) What size sample would be needed to have a margin of error equal to 1.5? B y x I - A - A - Ix E Vx c E HTML Editor x. : 12pt 31 © ? lothing
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...
statistics question about smoking before 18 years of ageAccording to an almanac, 70% of adult smokers started smoking before turning 18 years oh When technology is used, use the Tech Help button for further assistance. (a) Compute the mean and standard deviation of the random variable X, the number of smokers who started before 18 in 100 trials of the probability experiment (b) Interpret the mean.(c) Would it be unusual to observe 80 smokers who started smoking before turning 18 years old...
Find the mean, variance, and standard deviation of the binomial distribution with the given values of n and p. n = 121, p=0.32 The mean, H, is (Round to the nearest tenth as needed.) The variance, 02, is (Round to the nearest tenth as needed.) The standard deviation, o, is (Round to the nearest tenth as needed.) 47% of U.S. adults have very confidence in newspapers. You randomly select 10 US adults. Find the probably at the number of US...
Consider a population having a standard deviation equal to 9.96. We wish to estimate the mean of this population. (a) How large a random sample is needed to construct a 95% confidence interval for the mean of this population with a margin of error equal to 1? (Round your answer to the next whole number.) The random sample is units. (b) Suppose that we now take a random sample of the size we have determined in part a. If we...
Math 11- MAC27 oh MAC20, you found the mean and standard deviation for X, the number of dots facing up for your convenience, on the next page. we found that the mean is μ . 3.5 and the standard deviation is σ-1.7078 Now, suppose that instead of tossing one die and counting the number of dots facing up we toss Name when a die is rolled. You may want to pause and look over the solutions to MAC20. These are...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean H 141 days and standard deviation a (a) What is the probability that a randomly selected pregnancy lasts less than 137 days? The probability that a randomly selected pregnancy lasts less than 137 days is approximately (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 nearest...
.NEED ANSWER ASAP
A.)
B.)
NEED ANSWERS TO A.) and B.)
The mean and standard deviation of a random sample of n measurements are equal to 33.8 and 3.7, respectively. a. Find a 95% confidence interval for p if n = 144. b. Find a 95% confidence interval for u if n=576. c. Find the widths of the confidence intervals found in parts a and b. What is the effect on the width of a confidence interval of quadrupling the...
Suppose the longths of the pregnancies of a certain animal are approximately normally distributed with mean 184 days and standard deviation 16 days. Complete parts(a) through) below. a) What is the probability that a randomly selected pregnancy tests less than 179 days? The probability that a randomly selected pregnancy lasts less than 179 days is approximately (Round to four decimal places as needed.) Interpret this probability Select the correct choice below and Round to the nearest Integer needed) in the...
Question 4 10 pts X is a normal random variable with unknown mean o=5. and standard deviation (a) "Find the margin of error Ein a 95 percent confidence interval for je corresponding a random sample of size n = 16. (b) What size sample would be needed to have a margin of error equal to 1.5? B y x I - A - A - Ix E Vx c E HTML Editor x. : 12pt 31 © ? lothing
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...
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