Calculate confidence interval for the mean

Assignment Help Basic Statistics

Reference no: EM13122305

55 credit card holders are selected at random. for each their current credit card balance is recorded. the average for these 55 people is xbar = $700. assume that the current balance of all credit card holders follows a normal distribution with unknown mean and known standard deviation of $90. what is the 99% confidence interval for the mean?

Reference no: EM13122305

Questions Cloud

Words carry the message : "Words carry the message. They would carry the same meanings with or without paragraphing. Therefore, paragraphing has no effect on communication." Discuss your view of this statement and provide an example which supports your analysis.

Carol and david decide to play a game : Carol and David decide to play a game as follows: Carol draws and keeps a card from a shuffled pack number 1 to 6.

Stem-and-leaf plot for a given sample : The number of surfer's special burritos served was sampled during a dinner period 5:00 p.m. - 8:30 p.m. at a taco shop on a weekday. Below is the sample:

How do you think his values and attitudes would impact : Would you like to work with a manager like Goldhirsh? Explain why? Explain how do you think his values and attitudes would impact your day-to-day feelings about work?

Calculate confidence interval for the mean : Credit card holders follows a normal distribution with unknown mean and known standard deviation of $90. what is the 99% confidence interval for the mean?

Find out the slope and y intercept : Solve without graphing. Find the slope and the y-intercept for the graph of each equation in the given system. Use this information (and not the equations graph) to determine if the system has no solution or an infinite number of solutions.

Eight sides come up with equal probability : An octahedron is a three dimensional shape with eight sides that are equilateral triangles. THis shape is used as a die in games such as Dungeons and Dragons because all eight sides come up with equal probability.

Preparing a differnetial analysis : The main reason to prepare a differnetial analysis report is to: a. Decide between two options b. See if there has been a difference in net income over a period of time such as 5-10 years'

Composite function for inverse function : Suppose you have two functions f and g and you use them to form a composite function. Under what conditions will they be the same? Include a numerical example in your answer.

User Account

All Pages