A sample of 75 concrete blocks had a mean mass of (38.3 mathrm{~kg}) with a standard deviation

Question:

A sample of 75 concrete blocks had a mean mass of $38.3 \mathrm{~kg}$ with a standard deviation of $0.6 \mathrm{~kg}$.

a. Find a 95\% confidence interval for the mean mass of this type of concrete block.

b. Find a $99 \%$ confidence interval for the mean mass of this type of concrete block.

c. Approximately how many blocks must be sampled so that a $95 \%$ confidence interval will specify the mean mass to within $\pm 0.1 \mathrm{~kg}$ ?

d. Approximately how many blocks must be sampled so that a $99 \%$ confidence interval will specify the mean mass to within $\pm 0.1 \mathrm{~kg}$ ?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Statistics For Engineers And Scientists

ISBN: 9780073107677

6th Edition

Authors: William Navidi

See More Books

Question Posted: Feb 04, 2024 05:00 AM

See More Questions

What competencies would be needed by a U.S.-born leader being assigned to build power plants in India? What competencies would be needed by a India-born leader being assigned to run a copper mine in...
According to the bank statement summary for the year, cheques for 14,800 have been drawn in the name of the landlord. However, a landlords cheque for 1,200 had not been presented for payment at the...
The capacities (in ampere-hours) were measured for a sample of 120 batteries. The average was 178 and the standard deviation was 14. a. Find a 95% confidence interval for the mean capacity of...
You would like to design a product to sell to shopping malls that tells them more about the behaviours of their customers. The system would use cameras to track customers as they walk from store to...
A thermistor probe, in the shape of a needle parallel to the flow, reads a static temperature of 25C when inserted in the stream. A conical disturbance of half-angle 17 is formed. Estimate (a) The...
Rivera SpA has several processing departments. Costs charged to the Assembly Department for November 2020 totaled 2,280,000 as follows. Production records show that 35,000 units were in beginning...
Introduced to the Deloitte & Touche: Integrating Arthur Andersen Integrative Case. The case questions focused on issues pertaining to the relevance and goals of organizational behaviour, managerial...
This problem explores the sensitivity of the value-earnings and value-to-book models to changes in underlying assumptions. We recommend that you design a computer spreadsheet to perform the...
Select Three ( 3 ) reflective tasks from the book of Dale Carnegie ( How to stop worrying and start living ) , that you feel best evidence your development on the module.
One step in the manufacture of a certain metal clamp involves the drilling of four holes. In a sample of 150 clamps, the average time needed to complete this step was 72 seconds and the standard...
In a sample of 100 steel canisters, the mean wall thickness was $8.1 \mathrm{~mm}$ with a standard deviation of $0.5 \mathrm{~mm}$. a. Find a 95\% confidence interval for the mean wall thickness...
Verify the linear approximation at (0, 0). y - 1/x + 1 x + y - 1
You are finalizing a bank loan for $205,000 for your small business and the closing fees payable to the bank are 1.7% of the loan. After paying the fees, what will be the net amount of funds from the...
Book Co. has 1.8 million shares of common equity with a par (book) value of $1.05, retained earnings of $28.3 million, and its shares have a market value of $48.93 per share. It also has debt with a...
You own a bond with a face value of $1000 and a conversion ratio of 425. What is the conversion price?
MV Corporation has debt with market value of $100 million, common equity with a book value of $104 million, and preferred stock worth $21 million outstanding. Its common equity trades at $48 per...
MacKenzie Corporation currently has 11 million shares of stock outstanding at a price of $42 per share. The company would like to raise money and has announced a rights issue. Every existing...
The following items were included as cash on the balance sheet for Lawson Co. How should each of the items have been reported? (a) Demand deposits with bank (b) Restricted cash deposits in foreign...
Convert the numeral to a HinduArabic numeral. A94 12
Let X denote the diameter of an armored electric cable and Y denote the diameter of the ceramic mold that makes the cable. Both X and Y are scaled so that they range between 0 and 1. Suppose that X...
Let X denote the number of times a certain numerical control machine will malfunction: 1, 2, or 3 times on any given day. Let Y denote the number of times a technician is called on an emergency call....
Given the joint density function find P(1 < Y < 3 | X = 1). 6-1-y f(x, y) = (0, 0
what are the most important components of ethical leadership?
Assume that A = Rnxn is an invertible matrix and that b Rn and ER" are two nonzero vectors in R". We denote by x and the solutions to the linear equations Ax = b and A = , respectively. Show that ||...
How would you define ethical leadership today? Do you believe ethical leadership varies from organization to organization?

A sample of 75 concrete blocks had a mean mass of (38.3 mathrm{~kg}) with a standard deviation

Question:

Step by Step Answer:

Statistics For Engineers And Scientists

Students also viewed these Business questions