For the following question, use mu = 12.4, sigma = 3.8, and number of samples = 13. What is the probability of obtaining a sample between 14.19 and 14.8?
For the following question, use mu = 12.4, sigma = 3.8, and number of samples =...
For the following question, use mu = 12.8, sigma = 1.2, and number of samples = 15. What is the probability of obtaining a sample mean between the population mean and 0.4 points below the mean?
For the following question, use mu = 6.9, sigma = 2.6, and number of samples = 3. What is the probability of obtaining a sample mean above 8.39?
For the following question, use mu = 10.7, sigma = 0.2, and number of samples = 20. 19% of the samples have means as low or lower than ____
Suppose a normally distributed numerical variable X has MU = 15 and Sigma = 6. Answer the following questions about the sampling distribution of the mean if the sample size is 100. 1. The sampling distribution of X bar is (blank) distributed with mu X bar = (blank) and sigma X bar = (blank). (fill in the blanks) 2. Suppose a random sample is chosen. what is the probability that this selected sample mean is less than 14.2? 3. What...
The population of IQ scores forms a normal distribution with mu equals space 100 and sigma space equals space 15. If you take a random sample of 25 people who have taken the IQ test, what is the probability of obtaining a sample mean greater than M = 103? p = 0.8413 p = 0.5793 p = 0.4207 p = 0.1578
Assume that IQ's follow a Normal distribution with a mean mu=100 and standard deviation sigma=16. What is the probability that no more than 5 people in a random sample of size n=9 have IQ's between 90 and 110?
Given a normal distribution with mu equals 103 and sigma equals 25, and given you select a sample of n equals 25, complete parts (a) through (d). a. What is the probability that X is less than 93? P( X < 93)= b. What is the probability that X is between 93 and 95.5? P(93< X than 95.5)= c. What is the probability that X is above 104.8? P( X > than 104.8)= d. There is a 63% chance that...
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...
1) Suppose you have a normal distribution with known mu = 11 and sigma = 6. N(11,6). Using the 68,95,99.7 rule, what is the approximate probability that a value drawn from this distribution will be: a. Between 5 and 17? b. Between -1 and 23? c. Greater than 16? d. Less than -1? e. Less than 23? 2) Suppose you have a normal distribution with known mu = 8 and sigma = 2. N(8,2). Compute the Z---score for: a. X...
To construct a confidence interval for the difference between two population means mu 1 minus mu 2, use the formula shown below when both population standard deviations are known, and either both populations are normally distributed or both n 1 greater than or equals 30 and n 2 greater than or equals 30. Also, the samples must be randomly selected and independent. left parenthesis x overbar 1 minus x overbar 2 right parenthesis minus z Subscript c Baseline StartRoot StartFraction...