User Account

All Pages

Confidence interval for the true calcium content

Assignment Help Basic Statistics
Reference no: EM131167967

The calcium (Ca) content of a powdered mineral substance was analyzed 10 times with the following percent compositions recorded:

0.0271 0.0282 0.0279 0.0281 0.0268

0.0271 0.0281 0.0269 0.0275 0.0276

a. Find a 99% confidence interval for the true calcium content of this substance.

b. What does the phrase "99% confident" mean?

c. What assumptions must you make about the sampling procedure so that this confidence interval will be valid? What does this mean to the chemist who is performing the analysis?

Reference no: EM131167967

Questions Cloud

What factors are important in your decision : Decide what factors are important in your decision as to which computer to buy and list them. After you select the system you would like to buy, identify which terms refer to hardware and which refer to software.
Probability that their mean height : Suppose you know that male height (for adults) is normally distributed with a mean of 70 inches and a std dev of 3 inches. a) How many deviations is a 74.5 from the mean? b) What is the z value for 74.5? c) Why are they the same?
Comment on reporters interpretation of correlation : Researchers find that the correlation between yearly wine consumption and yearly deaths from heart disease is -0.84.- Comment on the reporter's interpretation of the correlation in this situation.
How does that affect the machine language program : If you add one line of source code, how does that affect the machine language program? Try adding different source code instructions, such as an add and then a multiply.
Confidence interval for the true calcium content : a. Find a 99% confidence interval for the true calcium content of this substance. b. What does the phrase "99% confident" mean? c. What assumptions must you make about the sampling procedure so that this confidence interval will be valid? What does..
How is moores law relevant to programmers : Suppose a transistor on an integrated circuit chip were 2 microns in size. According to Moore's Law, how large would that transistor be in 2 years? How is Moore's law relevant to programmers?
Dialed telephone numbers at random : Which of the following sources of error are included in the margin of error? -a different sample would likely produce different numbers -some people whose numbers were chosen never answered the phone in several calls -some people did not answer tr..
List five applications of personal computers : List five applications of personal computers. Is there a limit to the applications of computers? Do you envision any radically different and exciting applications in the near future? If so, what?
What implications does this present to you as a programmer : It is therefore possible for a program, thinking a memory location holds a piece of data when it actually holds a program instruction, to accidentally (or on purpose) modify itself. What implications does this present to you as a programmer?

Reviews

Write a Review

Basic Statistics Questions & Answers

  Problem regarding the job enrichment workshops

Can the human resource manager conclude, at the 5% significance level, that the job enrichment workshops increase sales consultants' job satisfaction levels? Present your findings to the human resource manager.

  A business magazine mailed a questionaire to the human

1. a state group is interested in whether voters would support lowering the legal drinking age to 18. a simple random

  What can you infer from the statistics

What can you infer from the statistics and what information might lead you to a different conclusion - what additional information would be valuable to help draw a more certain conclusion?

  In a recent study on gender differences in education a

in a recent study on gender differences in education a sample of 7 boys had a mean score of 18.8 and a standard

  Probability values based on contingency table

What is the probability of selecting a female or an accounting major? Which rule of addition did you apply?

  Testing of population proportion

Of the 38 numbers on a roulette wheel, 18 are red, 18 are black and 2 are green. If the wheel is balanced, the probability of the wheel landing on red is 0.474.

  Expected replacement for a customer

How long is the time to expected replacement for a customer who has owned a vehicle 6.5 years and calculate .95 and .99 confidence intervals and explain your results.

  Fit a simple linear regression model

1. (45 points) Use the "Female Bears Data." Data from n = 19 female bears of varying ages are used to develop an equation for estimating Y = female bear's weight from X = female bear's neck circumference.

  Modify formula-standard deviation-group designs

Discuss why the standard error for the distribution of sample means is smaller than the standard deviation of sample scores. Distinguish between within-group designs and between-group designs.

  Assembly time for a product-uniformly distributed

The assembly time for a product is uniformly distributed between 6 to 10 minutes.

  Find the minimum sample size that should be chosen to

find the minimum sample size that should be chosen to assure that the proportion estimate p will be within the required

  Preparing a report to present to the public health

You are preparing a report to present to the Public Health Council on the declining rates of gonorrhea in your state in both men and women over the last 10 years.

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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