Performing an appropriate hypothesis test

Reference no: EM13136918

An engineering firm is evaluating their back charges, and from this they claim that their average back charge is $1800. They randomly select 42 customers, and calculate the sample mean back charge to be $2010. If the standard deviation of back charges is $650, and alpha = 0.05, test the claim of the engineering firm. Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.

Reference no: EM13136918

Questions Cloud

Evidence of consolidation : Evidence of consolidation of learning.Analysis, critique and synthesis The case study was articulate, logical, balanced and convincing. A diverse range of perspectives was offered. All important aspects are covered demonstrating comprehensive knowled..

How many grams will remain after 112 days : Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32 P, how many grams will remain after 112 days?

Prepare the necessary journal entries for rich : Prepare the necessary journal entries for Rich, Inc. from January 1, 2012 through July 1, 2013.

Create a scale for likert-type summated scale : the U.S. economic system will be able to rebound following the recession of 2009-2010. Create a scale of each of the following types:Constant-sum scale and Likert-type summated scale.

Performing an appropriate hypothesis test : If the standard deviation of back charges is $650, and alpha = 0.05, test the claim of the engineering firm. Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.

Calculate the same ratios for the company : Exhibit 4 provides certain ratios for the Company's competitors. Calculate the same ratios for the Company but do so for the years 2007, 2008 and 2009. (You should prepare a table). Explain what each of the ratios implies about the Company.

What mass of li2so4 is formed : What mass of Li2SO4 is formed from mixing 24.5 mL of 1.32 molar LiOH with 10.2 mL of 2.43 molar H2SO4

Revenue collection in subsequent months : If 30% of the month's revenue is collected in the same month, 40% is collected in the second month and 30% is collected in the third month, how much of September's revenue is collected in subsequent months? How much of August's revenue is collecte..

Compute the test statistic for test and state rejection rule : The average age of the evening students is significantly different from 21. Use a 0.01 level of significance."Compute the test statistic for the test stated in the problem"

User Account

All Pages