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The American Airlines flights would like to study the departure delay time. They would like to test the claim that the mean departure delay time for all flights from New York to Los Angeles is less than 12 min. They recorded 64 different departure delay times and found the mean is 10 min and the standard deviation is 30 min. Use a 0.01 significance level to test the claim.
3. what is the degree of freedom?
Question 9 options:
30
64
63
8
Has there been a statistically significant change in the mean length of the bars?
A random sample of 20 purchases showed the amounts in the table (in $). 20.20 21.74 62.41 82.16 44.39 45.32 66.55 46.67 27.15 51.24 85.64 31.84 71.85 53.02 33.74 86.93 14.81 54.32 77.2359.17
Using these data, and assuming that the average current purchase price of the pools in the sample is $32,500, estimate the percentage of a pool's cost that can be recouped when the home is sold.
The Mann-Whitney test, or none of these tests?
Pick any other variable you are interested in and do a simple 2-way ANOVA without replication. Why did you pick this variable and what do the results show? Using the results for this week, What are your conclusions about gender equal pay for equal ..
The Burger corporation is looking at its fast-food franchises and in particular is interested in how quickly people are served. In one restaurant, where it receives most of its complaint, an analysis reveals the following. The attendants can serve, o..
"Range of optimality" describes the impact of simultaneous changes in objective function values and right-hand-side values.
1 out of 3 people in the united states will develop shingles during their lifetime. imagine that you are a doctor who is about to examine 10 unrelated adults selected at random and before you examine them we ask you what are the chances that.a. At l..
Use these data to test the null hypothesis of no difference in the use of sick days between younger and older adults - What do your results indicate
Construct a 90% confidence interval for (p1-p2)
A traffic engineer is studying a stretch of road on a rural highway. At his observation point, an average of 12 vehicles per hour pass. The vehicles are independent of each other. 1. What is the probability that fewer than 5 vehicles pass betwee..
The finance director of a hardware wholesaler has asked the accountant to ring each customer five days before their account payment is due, as a means of reducing the number of late payments. As a result of time constraints, however, only 60% of cust..
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