Find confidence interval for average amount spent

Reference no: EM13120566

Collete is self-employed, selling stamps at home parties. She wants to estimate the average amount a client spends at each party. A random sample of 35 clients' receipts gave a mean of $34.70 with standard deviation s= $4.85.

a. Find a 90% confidence interval for the average amount spent by all clients

b. What conditions are necessary for your calculations?

b. For a party with 35 clients, use part (a) to cstimate a range of dollar values for Collete's total sales at that party.

Reference no: EM13120566

Questions Cloud

Illustrate what is the tangential velocity of the bug : Illustrate what is the tangential velocity of the bug? One second after the bug starts from rest, what are its tangential acceleration, radial acceleration, and total acceleration(with the degree)

Determine the equilibrium concentration of pb2+(aq) : A pipette is used to add 46 mL of 0.3 M Pb(NO3)2 to a 273.0 mL solution of 0.3 M NaF. Determine the equilibrium concentration of Pb2+(aq) in the final solution. Ksp(PbF2)=3.6E-8

Find probability of speeding violations : Probability of speeding violations, A sample of 2000 licensed drivers revealed the following number of speeding violations

Extraneous solutions to real life problems : The answer was finding the length and width of a rectangle. The results were x= 3 and x= -4. Neither the length or width can be a negative number. However, 3 did work in the original equation."

Find confidence interval for average amount spent : A random sample of 35 clients' receipts gave a mean of $34.70 with standard deviation s= $4.85. Find a 90% confidence interval for the average amount spent by all clients

Explain how much time elapses after the police car : Precisely 1.10 after the speeder passes, the policeman steps on the accelerator. If the police car's acceleration is 2.10 m/s2, Explain how much time elapses after the police car is passed until it overtakes the speeder

Problem related to net operating income : If sales to increase by 11% next year. How do I find the percentage that should net operating income will increase?

What will be the final temperature : A 100g sample of water at 27oC is poured into a 76.2g sample of water at 89oC. What will be the final temperature.

Draw a coin ramdomly what is the probality that : Suppose you have 3 nickels, 2 dimes and 6 qtrs in your pocket. If you draw a coin ramdomly what is the probality that a. you will draw a dime ? b. you will draw a half dollar ? c. you will draw a qtr?

User Account

All Pages