Answer:
100
Step-by-step explanation:
200+3qq+400+q3q
200+3q²+400+3q²
3q²-3q²+400-200
q²=200
q²=200/2
q²=100
Hey again!
i don't know if i am doing this correctly but i will give it a go
179 - 143.20 = 35.8
179 / 35.8 = 5
so this would mean from 179 to 143.20 their is a 5% discount
Hope This Helps!
Answer: x= 9.5 hope this helps you
Step-by-step explanation:
2 1/4 + 2 1/4 + 2 1/4. This is the same as it because adding it 3 times is the same as multiplying 2 1/4 by 3
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?
Answer:
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