Construct confidence interval has a normal distribution

Assignment Help Basic Statistics

Reference no: EM13114752

a) construct a 95% confidence interval for the population mean, μ. assume the population has a normal distribution. In a random sample of 26 computers, the mean repair cost was $137 with a standars deviation of $35.

b) suppose you did some research on repair costs for computers and found that the standard deviation is σ=35. Use the normal distribution to construct a 95% confindece interval for the population mean, μ. compare the results.

Reference no: EM13114752

Questions Cloud

How will you proceed with such a study : Suppose you are a behavioral psychologist and are asked to determine to what extent intelligence (IQ) is heritable or multifactorial. That is, how much is inherited versus how much IQ results from environmental influences? How will you proceed wit..

Illustrate what is the magnitude of the acceleration : illustrate what is the magnitude of the acceleration of the box and hanging mass?

Calculate the pressure of oxygen : A steel tank has a volume of 438 L and is filled with 0.885 kg of oxygen. calculate the pressure of oxygen at 69.8 fahrenheit.

Offer a minimum of two examples and document the process : Offer a minimum of two examples and document the process of cost commitment during various phase of the product's life cycles

Construct confidence interval has a normal distribution : Construct a 95% confidence interval for the population mean, μ. assume the population has a normal distribution. In a random sample of 26 computers.

Computation of correlation coefficient : The data below are the final exam scores of 10 randomly selected statistics students and the number of hours they studied for the exam. Find the correlation coefficient between hours studied and final exam scores.

Illustrate what is the max heigh that the rocket reaches : Neglect air resitance. Find rocket's kinetic energy when the rocket is 1000 km above Earth's surface. Illustrate what is the max heigh that the rocket reaches.

Probability-acceptance sampling for cd : With one method of a procedure called acceptance sampling, a sample of items is randomly selected without replacement and the entire batch is accepted if every item in the sample is okay.

Make the entries that both silver and bronze companies : The Bronze Co. paid the invoice within the discount period. Make the entries that both Silver and Bronze Companies would record for the above.

User Account

All Pages