The mean gross annual incomes of certified welders are

Assignment Help Basic Statistics
Reference no: EM13611065

The mean gross annual incomes of certified welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000. The ship building association wishes to find out whether their welders earn more or less than $20,000 annually. The alternate hypothesis is that the mean is not $20,000. If the level of significance is 0.10, what is your decision ?

Please show work.

Reference no: EM13611065

Questions Cloud

The bryan company issued 500000 of 10 face valuebonds on : the bryan company issued 500000 of 10 face valuebonds on january 1 2007 for 486000. the bonds are duedecember 31 2009
The amounts of soft drink machine is designed to dispense : the amounts of soft drink machine is designed to dispense for each drink are normally distributed with a mean of 11.7
Observe the sparks produced when the bare ends of the wires : wire a series circuit consisting of a 9 v battery and the 10 milli henry inductor. break the circuit at one point and
Abc began business in january 2009 the firm makes : abc began business in january 2009. the firm makes anexercise machine for home and gym use. following are data
The mean gross annual incomes of certified welders are : the mean gross annual incomes of certified welders are normally distributed with the mean of 20000 and a standard
A 42 g ice cube at its melting point is dropped into an : a 42 g ice cube at its melting point is dropped into an insulated container of liquid nitrogen. how much nitrogen
Maynor county officials have concluded that several legally : maynor county officials have concluded that several legally separate entities must be included as component units of
A wheelchair marathoner has a speed of 5 ms after rolling : a wheelchair marathoner has a speed of 5 ms after rolling down a small hill in 1.5 s. if the wheelchair underwent a
Determine the radius r of an impurity atom that will fit : determine the radius r of an impurity atom that will fit into a tetrahedral site of bcc ironr1.241 angstroms crystal

Reviews

Write a Review

Basic Statistics Questions & Answers

  Test the hypothesis that the mean is not pounds

Ask 20 men thier weight and use excel to calculate the mean. test the hypothesis that the mean is not 172 pounds at the .10 significance level.

  Effect of independent variable on dependent variable

Stalnaker technique: what effect does the independent variable have on the dependent variable? type of hypothesis? what is independent variable? dependent variable?

  Plot macrx and r charts based on the data above what center

the table below gives information on coded length measurements in a machining process. the data shown are macrx and r

  Normal probability-sampling distribution of sample mean

Given a normal distribution with a population mean of 100, a standard deviation of 10 and a sample size of n = 25, what is the probability that X is

  Making linear regression equation

Find out the best predicted household size given that the household discards 5.00 lb of plastic.

  Convert midterm score of eighty four to standard z score

Standard deviation of 12%. Assume that scores in both classes follow a normal distribution. Convert Maria's midterm score of 84 to a standard z score.

  Markov analysis to solve word problem

A study of accounts receivable at the A&W Department Store indicates that bills are either current, one month overdue, two months overdue, written off as bad debts, or paid in full.

  Compute probability of receiving calls in interval of time

Compute the probability of receiving three calls in a 5-minute interval of time. Compute the probability of receiving exactly 10 calls in 15 minutes.

  Determining critical value for left-tailed test

Using standard normal table, show critical value for left-tailed test with α = 0.02.

  Confidence interval for mean amount of time ham is smoked

Length of smoking time was recorded for each. Mean was =140 hours. Suppose = 8 hours. Determine 95% confidence interval for mean amount of time grocery-store ham is smoked.

  Six hypothesis testing problems

In a normal distribution with mean 59 and standard deviation 22, how large a sample must be taken so that there will be at least a 90 percent chance that its mean is greater than 53?

  Find probability-none of the three parents give punishment

What is the probability that none of the three parents condone spanking as a regular form of punishment for their children?

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