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

Previous Q& A

  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:

  Explain theory about capital project projection satisfaction

Explain Theory about capital project projection satisfaction of the hurdle-rate requirements and what other criteria impact the decision

  Categorizing discrete or continuous random variables

Categorize the following as discrete or continuous random variables.

  Evaluating a capital investment project

Which methods of evaluating a capital investment project ignore the time value of money and the first line item in the operating activities section of a spreadsheet for a statement of cash flows prepared using the indirect method

  Inverse delivery curve substitutes or complements

elling price of another product Y in dollars per unit. The inverse delivery curve. Conclude whether X also Y are substitutes or complements.

  Inflation and output ratio

Suppose that natural real GDP is constant.  For every 1 percent increase in the rate of inflation above its expected level, firms are willing to increase real GDP by 2 percent.

  Applications of several observational study designs

Applications of Different Observational Study Designs' indicating for every objective under pertinent study design.

Reviews

Write a Review

 

Similar Q& A

  Contingency table and probability

What is the probability that the cereal would be high calorie? In other words, what is P (high calorie)?

  Determining optimal solution

If a technical breakthrough occurred that raised the profit per unit of X 1  to $3, would this affect the optimal solution?

  State the values of the coefficient of correlation

State the values of the coefficient of correlation and coefficient of determination correct to three decimal places

  Finding number of traffic accidents after modification

At.01 significance level is it sensible to conclude that modification decreased the number of traffic accidents?

  Probability and normal distribution

If the mean times for both George and Julia are actually the same, what is the probability that George will be let go?

  Construct a histogram for given data

The following frequency distribution was obtained. The data values are in hours. Construct a  histogram for the data .

  Global test of hypothesis to find regression coefficients

Carry out the global test of hypothesis to find out whether any of the regression coefficients are not equal to 0. Use.05 level of significance.

  Determining height interval the company expect

In what height interval must the company expect to determine middle 70% of kindergarteners?

  Find the explanatory variable in this study

The researchers planned to use simple linear regression to see if the age at which a baby was first able to crawl could be predicted from the average outdoor temperature six months after each baby's birthdate.

  Arrival of emails is approximated by poisson distribution

Internal study by Technology Services department at Lahey Electronics disclosed company employees get the average of 2 emails per hour. Suppose arrival of these emails is approximated by Poisson distribution.

  The mean and standard deviation for the process

We are establishing a quality control program for a process and need to establish the mean and standard deviation for the process. The first 10 batches had samples of size 5 taken.

  Finds the confidence interval

Find the relative risk for moderate beer drinkers as compared to nondrinkers, finds the 95% confidence interval

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