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Question: 1. Suppose a coin has been shaved so that the probability of tossing a head is 0.40. This coin is flipped four times. What is the probability of getting at least two heads. What is the probability of getting exactly two heads?
2. A dishonest die comes up only 1, 4 or 6. This dieis rolled three times. What is the probability that the total is 5?
the results of a recent poll on the preference of voters regarding the presidential candidates are shown below. voters
for a distribution of scores x40 corresponds to a z-score of z -1.00 and x 42 corresponds to a z-score of z -.50. what
1. Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a mean of 71 mph and a standard deviation of 8 mph.
Assuming the life length of this type of lightbulb is normally distributed, if you wish to conduct this test using a .05 level of significance, what is the critical value that you should use? Place your answer, rounded to 3 decimal places in the b..
an article states that false-positives in polygraph tests i.e. tests in which an individual fails even though he or she
If all lock combinations are equally likely, what is the probability of selecting a lock with only single-digit numbers in the combination?
The use of coding has become particularly significant in recent years. One way to encrypt or code a message uses matrices and their properties. We start with a message coded into matrix form, called A. Multiply A by another matrix B to get AB and ..
Women's heights are normally distributed with mean 63.6 and standard deviation of 2.5 in. A social organization for tall people has a requirement that women must be at least 70 in tall.
a researcher conducts a study of white and black attitudes toward the police in her community.the percentage of white
A company has developed the new battery, but the average lifetime is unknown. In order to estimate the average, a sample of 150 batteries is tested and an average lifetime of this sample is found to be 250 hours.
For a sample of 12 items from a normally distributed population for which the standard deviation is s=17.0, the sample mean is 230.8. At the 0.05 level of significance
Confidence interval for the true mean and Evaluate the 95% confidence interval for the true mean advertising expense?
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