Normal distribution-standard deviation

Assignment Help Basic Statistics
Reference no: EM1313833

Assume that the measurements came from a normal distribution. The variability of the manufacturing process is unknown means the same as the standard deviation is unknown.

Auto crank shafts. Here are measurements (in millimeters) of a critical dimension for 16 auto engine crankshafts:

224.120     224.001     224.017    223.982    223.989     223.961

223.960     224.089     223.987    223.976    223.902     223.980

224.098     224.057     223.913    223.999

The dimension is supposed to be 224 mm and the variability of the manufacturing process is unknown.  Is there evidence that the mean dimension is not 224mm?

1. The appropriate test to use is

a. T Test         

b. 1-Prop Z test          

c. Z Test          

d. Paired T test

2. The appropriate type of test to use based on the tails of the distribution

a. Left-tailed              

b. Two-tailed              

c. Right-tailed

Reference no: EM1313833

Questions Cloud

Fewer also fewer barriers to trade : With fewer also fewer barriers to trade, countries are able to focus on producing those goods also services which they are best.
Determining mutually exclusive events : Events A and B are mutually exclusive events defined on common sample space. If P (A) 0.5 and P (A or B) = 0.70, determine P (B).
Calculation of npv and irr and mirr : Calculation of NPV and IRR and MIRR and Profitability Index and Besides future cash flows what other financial criteria would you consider in making your decision between two or more alternatives
Low fixed costs also high variable costs : One organization must have high fixed costs also low variable cost also the other must have low fixed costs also high variable costs.
Normal distribution-standard deviation : Assume that the measurements came from a normal distribution. The variability of the manufacturing process is unknown means the same as the standard deviation is unknown.
Effects of transactions on statement of cash flows : Effects of transactions on statement of cash flows - Indicate for each of the following what should be disclosed on a statement of cash flows (indirect method).
Features of angiosperms : With these anatomical features in mind, do some research in order to determine an angiosperm which has modified leaves, stems, roots or flowers that do not function in the normal manner, or that function in an unusual manner.
Organization has the bigger incentive for careful quality. : Which organization has a bigger markup. Explicate. Which organization has the bigger incentive for careful quality control
Prepare statement of cash flows : Prepare statement of cash flows (indirect method) using balance sheet data Following are comparative balance sheets for Millco, Inc., at January 31 and February 28, 2009:

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Determine the monthly payment

Investigate the cost of a home mortgage and to determine the monthly payment.

  Computing correlation and coefficient of determination

Calculate (rounded to the nearest tenth) The correlation between IQ and Anxiety r =??

  Consideration of a variable

Which of the following(s) can be considered (a) variable(s)?

  Computing the correlation coefficient

The main goal of correlation research is ______________

  What does the odds ratio mean here

A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.

  Identifications by random guess

If the voice identifications were made by random guess, find the probability that all 9 victims would select the same person?

  Probability for normal distribution-sampling distribution

If 25 men aged 18-24 are arbitrarily chosen, determine probability that their mean serum cholesterol level is between 165 and 200.

  Biggest problem facing education today

Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.

  Evidence that females are being discriminated against

Examine the relationship between final grade and the reported hours per week each student said they studied for the course. Do we have evidence that females are being discriminated against?

  Evaluating proportion of costs using empirical rule

Use empirical Rule to evaluate proportion of costs within 2 standards deviations of mean. Write down these limits.

  Condition for the events to be independent

Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.

  Developing appropriate hypotheses

Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd