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Q1) Cell phone producer claims that its phone will last for more than eight hours of continuous talk time when battery is fully charged. To test this claim a sample of n = 18 phones were tested. Results illustrated a sample mean of 8.2 hours and sample standard deviation of 0.4 hours. Conduct hypothesis test using a 0.05 level of significance and find out whether or not company's claim is supported.
Q2) If hypothesis test for single population variance is to be conducted by using significance level of to 0.10, a sample size of n = 16, and test is a one-tailed upper-tail test, the critical value is:
i) z = 1.28.
ii) t = 1.345.
iii) x2= 22.3071.
iv) x2= 24.9958.
Where S, A, and R are measured in dollars per week. Vanguard's marketing director is comfortable using parameter estimates that are statistically significant at the 10% level or better.
The mean number of passengers per flight is 160 with a standard deviation of 20. The aircraft used for the route has 200 seats.
Test for significant differences among weight losses for the five diets, and perform all pair wise comparisons using:
For following scores determine values of each expression: X: 4, 2, 1, & 5. åX, åX 2 , (åX) 2 , å(X-1).
FBI Report Do greater universities tend to have more property crime, would you speek that the correlation is low, moderate or high
Determine the class with the greatest number of data values.
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
Find the probability that in a given year,a) Exactly one major hurricane will strike the U.S. mainland
Find the probability of failure of system for any 4 hours of operation?
A small town has a population of 20,000 people. Among these 1,000 regularly visit a popular local bar. A sample of 100 people who visit the bar is surveyed for their annual expenditures in the bar.
While purchasing a home, location is everything. As a buyer, one should be aware of the cost of living in the area of choice, as well as expect a higher cost the closer to the center of town you get.
Iit is known that signal change in this brain area is normally distributed with mean of 35 and standard deviation of 10. By using .01 level, what must researcher conclude?
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