Compute interval for true mean delivery time

Assignment Help Basic Statistics

Reference no: EM13124185

Delivery time by courier services is important to stock brokers. One such firm wishes to estimate the average time taken by couriers delivering negotiable securities in New York City. Specifically, the firm randomly samples 36 courier pickup and delivery times. The collected data, in minutes, represent the time between pickup and delivery. Suppose the population standard deviation is 0.3 minutes and the sample mean is 9.975. A 90-percent confidence interval for the true mean delivery time is?

Reference no: EM13124185

Questions Cloud

Cash register tape for leprechaun industries : The cash register tape for Leprechaun Industries reported sales of $7,783.12. Record the journal entry that would be necessary for each of the following situations: (a) Cash to be accounted for exceeds cash on hand by $52.60.

What is the molar mass of (nh4)2so4 : A solution is made by dissolving 26.44 g of (NH4)2SO4 in enough H2O to make 50.75 mL of solution.What is the molar mass of (NH4)2SO4?

Tropical pools sells an aboveground model for p dollars : Demand for pools. Tropical Pools sells an aboveground model for p dollars each. The monthly revenue for this model is given by the formula R(p)=0.08p2 +300p.

Total production will increase at a diminishing rate : The present value of the gain from employing the new factory must be less or equal to $50 million and the rate of return from the new factory must be greater than 7%.

Compute interval for true mean delivery time : Suppose the population standard deviation is 0.3 minutes and the sample mean is 9.975. A 90-percent confidence interval for the true mean delivery time is?

Linear equation and line : A jazz concert brought in $179,500 on the sale of 8,700 tickets. if the tickets were sold for $15 and $25each, how many of each type of ticket were sold?

Describe the evolving accounting standards for recording : Describe the evolving accounting standards for recording and translating foreign exchange related transactions and financial statements?

Determine the cost recovery deduction : Determine the cost recovery deduction for 2012 for these assets.

Own field research : When conducting research, it's a good idea to search the databases available through your school's library before searching the Internet because information on the Internet is not always reliable.

User Account

All Pages