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In each of the following cases, decide whether or not a binomial distribution is an appropriate model, and give your reasons.
a) A firm uses a computer-based training module to prepare 20 machinist to use new numerically controlled lathes. The module contains a test at the end of the course; X is the number who perform satisfactorily on the test.
b) The list of potential product testers for a new product contains 100 person chosen at random from the adult residents of a large city. Each person on the list is asked whether he or she would participate in the study if given the chance; X is the number who say "Yes".
Projection are form the U.S. National Center for Education Statistics>. Create a multiple bar graph of data, and then explain any trends.
Explain which indicate that changes in the concentration of carbon dioxide which cause changes in the global temperature
Scores on a test are normally distributed with a mean of 60.9 and a standard deviation of 12. Find P81, which separates the bottom 81% from the top 19%.
Which probability distribution is suitable when sampling without replacement?
Variance of 4.2 and mean of 23.2 were calculated. Find out 95% confidence interval on mean and standard deviation. Describe any potential problems with this analysis.
An exam consists of 10 true or false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly six questions correctly? (Round the answer to three decimal places)
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major.
Find the critical value and test statistic value follows normal distribution.
Monthly sales figures for store are as follows. Determine the:Mid-rangeStandard Variance.
How variable is the number of service calls with which Sam's department must deal?
Determine the probability that person selected has blood type O? Given that person selected is a male, determine the probability that their blood type is AB?
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