Finjan is a company that makes a new security product designed to protect software written in the Java programming language against hostile interference. The market for this program materialized recently when Princeton University experts showed that a hacker could write misleading applets that fool Java's built-in security rules. If, in 430 trials, the system was fooled 47 times, give a 95% confidence interval for p = probability of successfully fooling the machine.
Answer to relevant QuestionsSony's new optical disk system prototype tested and claimed to be able to record an average of 1.2 hours of high-definition TV. Assume n = 10 trials and σ = 0.2 hour. Give a 90% confidence interval. In a survey, Fortune rated companies on a 0 to 10 scale. A random sample of 10 firms and their scores is as follows. FedEx 8.94, Walt Disney 8.76, CHS 8.67, McDonald's 7.82, CVS 6.80, Safeway 6.57, Starbucks 8.09, Sysco ...An estimate of the average length of pins produced by an automatic lathe is wanted to within 0.002 inch with a 95% confidence level. σ is guessed to be 0.015 inch. a. What is the minimum sample size? b. If the value of σ ...A marketing manager wishes to estimate the proportion of customers who prefer a new packaging of a product to the old. He guesses that 60% of the customers would prefer the new packaging. The manager wishes to estimate the ...For each one of the following null hypotheses, determine if it is a left-tailed, a right-tailed, or a two-tailed test. a. μ ≥ 10. b. p ≤ 0.5. c. μ is at least 100. d. μ ≤ = – 20. e. p is exactly 0.22. f. μ is at ...
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