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An offspring of a grey cat is grey with probability 0.6 and white with probability 0.4. An offspring of a white cat is grey with probability 0.2 and white with probability 0.8. Rex is a white cat.
Suppose that for he company produces Independence Day, the company produces special bags containing 100 pieces of candy where 30 are red, 30% are white, and 40% are blue. If two pieces of candy are
While driving a truck over a rugged terrain test track, it is found that 8% of the trucks will experience a flat tire before the test is completed. Find the probability that at least 7 trucks are te
An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with a mean of 1900 hours and variance of 10,000. Find the probability that a random
Considering that a researcher can test at the <p = .05 (95%), p = .01 (99%), or p = .001 (99.9%) level for statistical significance, how do you use these three levels in relationship to evaluate
For a particular age group of adult males, the distribution of cholesterol readings, in mg/dl, is normally distributed with mean of 210 and standard deviation of 15. What percentage of this populati
In an instant lottery, your chances of winning are 0.2. If you play the lottery five times and outcomes are independent, the probability that you win all five times is:
Find the lowest test score that a student could get and still meet the college's requirements.
Assume that the heights of women are normally distributed with mean of 63.6 inches and a standard deviation of 2.5 inches. Find the third quartile value in the given distribution of the heights of w
If when measured in degrees Celsius, temperature is normally distributed with mean 115 and standard deviation 2, what can be said about the distribution of temperature measured in degrees Fahrenheit
What is the conditional probability that th affected person is a woman?
The amount of water put into a bottle is normally distributed with μ=16 3/4 ounces and σ= .02. What is the probability that the bottle will contain less than 16 ounces?
A class of first graders includes 7 girls and 14 boys, 2 students are selected at random for the teacher to help on a given day. What is the probability that both are boys?
Researchers found a correlation coefficient of r = .50 on personality measures for identical twins. A reporter interpreted this to mean "the environment orchestrated one-half of their personality di
Nine students take an exam and have an average score of 75. A tenth student takes the exam and her score is added to the group. What score must she have if the average score is raise to 76?
5 cards are dealt from a well shuffled deck. You get $2 for each ace in your hand, but pay $1 for the privilege of playing. Find the expected value and standard deviation of his net win in one round
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
A study shows that approximately 15% of all businessmen who wear ties, wear them to tight. At a board meeting of 25, all of whom are wearing ties, what is the probability that at least 18 are not we
what is the the test statistic and at a 95% confidence level what is the critical value in this test?
A project being analyzed by PERT has 38 activities, 16 of which are on the critical path. If the estimated time along the critical path is 90 days with a project variance of 25, the probability that
A length of buck antlers is normal distributed with a mean of 1.30 inches and a standard deviation of 0.08 inch. If you select a random sample of 16 antlers, what is the probability that the sample
The price of a baby tiger has a mean of $115,000 and a standard deviation of $25,000. A random sample of 16 cubs from a zoo was taken. Describe the sampling distribution of the sample mean (indicate
Suppose that customers at a telephone company receive busy signals 4% of the time. One week a customer calls 25 times. Whats the probability of one busy signal?
The mean and standard deviation of the max loads supported by 60 country bridges in texas is 11.09 tons and 0.73 respectively. Find the 95% confidence interval for the mean of all similar bridges in
If z is a standard normal random variable, the area between z = 0.0 and z =1.20 is 0.3849, while the area between z = 0.0 and z = 1.40 is 0.4192. What is the area between z = -1.20 and z = 1.40?