kassi2007
16.08.2020 •
Mathematics
Recently a sample of 36 pieces of thread showed a mean breaking strength of 8.93 oz. Can one conclude at a significance level of (a) 0.05, (b) 0.01 that the thread has become inferior?
Solved
Show answers
More tips
- H Health and Medicine What vaccines do children need?...
- H Health and Medicine Reasons for the Appearance of Warts: Everything You Need to Know...
- G Goods and services What Are the Most Popular Services?...
- O Other What is the oldest joke ever told?...
- L Legal consultation How to Properly Inherit: Tips and Recommendations...
- C Computers and Internet Boost your processor performance with these easy tips...
- S Sport How does Bodyflex work: what is it and how does it work?...
- H Health and Medicine How to Whiten Teeth and Get the Perfect Smile...
- S Style and Beauty How to Properly Apply Eye Makeup: Tips from a Professional Makeup Artist...
- A Auto and Moto How Can Parking Sensors Help Drivers?...
Answers on questions: Mathematics
- M Mathematics Math math help help pelssse pelsss...
- M Mathematics Please help me with this question !...
- M Mathematics If anyone answers thank you for the help...
- M Mathematics A) 3 NIX 01/x b b) = = 8.5...
- M Mathematics Solve the equation (x-4) (x+9) = 0...
- M Mathematics The stem and leaf diagram shows information about the areas of 32 photographs. Write down the number of photographs that have an area of 38 cm2....
- M Mathematics PLEASE HELP ME GET ALL THESE QUESTIONS QUICKLY DONE I WILL MARK BRAINLIST PLS PLZ PLZZZZZ...
- M Mathematics (-3)2 * (5-7)2 - (-9) /3...
- M Mathematics What is the volume of a cube with sides of length 9m?...
- M Mathematics Find an equation of the parabola with vertex (2, 1) and focus (2, -3)....
Ответ:
Complete Question
It has been found from experience that the mean breaking strength of a particular brand of thread is 9.72 oz with a standard deviation of 1.4 oz. Recently a sample of 36 pieces of thread showed a mean breaking strength of 8.93 oz. Can one conclude at a significance level of (a) 0.05, (b) 0.01 that the thread has become inferior?
At both and the conclusion is that the thread has become inferior
Step-by-step explanation:
From the question we are told that
The population mean is
The standard deviation is
The sample size is n = 36
The sample mean is
The null hypothesis is
The alternative hypothesis is
Generally the test statistics is mathematically represented as
=>
=>
So
The p-value obtained from the z- table is
So at
So we reject the null hypothesis,hence we conclude that the thread has become inferior
So at
So we reject the null hypothesis,hence we conclude that the thread has become inferior
Ответ:
It is pi over 6:
We first solve this by determining how many times it goes around the circle. When you turn 25pi/6 into a mixed number you get 4pi + 1pi/6. Since it takes 2pi to get around the circle once, you go around the circle twice with 4pi. This leaves with 1pi/6 left at the starting point. The answer is pi/6. 13pi/6 also has the same terminal angle but it is not in range of answers (they are asking for 0-2pi)