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There is concern about the percent of on-time flights. A recent survey of two major airlines yielded the following results. At α = 0.05 test the claim that there is a difference in proportions of on-time flights.
a. State the Hypotheses:
b. Compute the Test statistic: (Round off correctly)
c. Find the p-value:
d. Make the decision using the Decision Rule: (Compare the p-value with α)
e. Write the Conclusion (in plain English as related to the claim):
The mean fare charged for service from the beach to the airport is $18.00 and the standard deviation is $3.50. We select a sample of 15 fares. What must you assume to make the above calculation?
Given that 800 people were aged between 25 and 40, approximately how many had a systolic blood pressure reading greater than 140 and less than or equal to 150?
National average for 2-year leases is 30,000 miles. Select the suitable hypothesis.
Student A and B took different statistics classes and 2 different finals. Student A had a score of 83 out of 100 and ranked 72 in his class. Student b scored 85 out of 100 and he ranked in the 70 percentile of his class.
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If the computer manufacturer decides to sample 2,300 of the microchips received in each shipment, what acceptance number, c, would they want?
An analyst working at BC Statistics is compiling a report on the use of the internet at home. In 1997, 250 randomly selected people were asked about the average amount of time spent on the internet per week.
Starting with the initial solution derived by the nw corner method identify the cell w/the best cost improvement index and the quantity that can be transferred to that cell.
At the 0.05 significance level, can he conclude that number of absences has declined? calculate approximately the p -value.
You are a realtor with a small business. You use a simple 2 variable linear regression analysis for quick first glance house price estimates using square footage of the house.
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