The cost CC (in dollars) for the care and maintenance of a horse and carriage is C=15x+2000C=15x+2000, where xx is the number of
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The standard deviation of the sample proportion is:
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Reference to a standard normal distribution table shows that the probability that at least 70% of the sample prefers coke to pepsi is 0.8944 or 89.44%.
The z-score for 0.7 is:
Reference to a standard normal distribution table shows that the probability that at least 70% of the sample prefers coke to pepsi is 0.8944 or 89.44%.