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A pizza delivery service delivers to a campus dormitory. Delivery times follow a normal distribution with a mean of 20 minutes and a standard deviation of 4 minutes. Find the delivery time that 20% of all deliveries are less than?
The following payoff matrix represents long run payoffs for 2-duopolists faced with the option of purchasing or leasing buildings to use for production.
State a conclusion about the null hypothesis-reject Ho or fail to reject Ho. State a final conclusion-non-technical that addresses the original claim.
Ken and Gerard are roommates for a weekend and have succeeded in making their living quarters cluttered in very little time.
Consider the following data for a simultaneous move ggiven: If you advertise and your rival advertises, you will each earn 5 million dollar in profits.
Does this indicate that the percentage has increased from that of previous studies? Test at the 5% level of significance.
Nine randomly selected statistics quiz scores are listed below. Use a .10 level of significance to test the claim that the variance of all scores in the population is more than 9. 15,18,10,19,11,12,15,17,15
Suppose you are planning entering a market serviced through a monopolist. You currently receive $0 economic profits, while monopolist receives $5.
One airport had 28% late arrivals. After a new directing system was installed, a sample of 1200 flights had 322 late arrivals. At the .01 level, did the new system lower the rate of late arrivals? List the null and alternate hypotheses.
The following hypothetical data demonstrate the relationship. The dependent variable is a measure of language skill at age 3 for each child. Do the data indicate any significant differences? Test with α=0.05.
A manufacturer of a new, less expensive type of light bulb claims that this product is very well made and even more reliable than the higher priced competitive light bulbs.
In a public opinion poll, 48% of 189 respondents favor an elimination of taxes on dividend income.
Test the hypothesis that random variable 30.4 31.2 30.8 29.9 30.4 30.7 29.9 30.1 come from a normal distribution with mean 30.5. The standard deviation of the measurements is known to be 0.1
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