Answer:
Step-by-step explanation:
Given that the housing market has recovered slowly from the economic crisis of 2008. Recently, in one large community, realtors randomly sampled 38 bids from potential buyers to estimate the average loss in home value.
s = sample std deviation = 3000
Sample mean = 9379
Sample size n = 38
df = 37
Std error of sample mean = 
confidence interval 95% = Mean ± t critical * std error
=Mean ±1.687*486.66 = Mean ±821.003
=(8557.997, 10200.003)
a) If std deviation changes to 9000 instead of 3000, margin of error becomes 3 times
Hence 2463.008
b) The more the std deviation the more the width of confidence interval.
Answer:
1,112,438 becomes 1,112,000
Answer:
Your correct answer is -3
Explanation:
- 7/4 is the only simplified fraction for the fraction of 7/4. All you have to do is simplify 7/4 to the simplest form.
They're used to measure or divide things¿
Answer:
So the blank is cos.
Step-by-step explanation:
There is an identity for this:
Let's see if this is fit by your left hand and right hand side:
So 
while 
.
Let's plug these in to the identity above:
Ok, we definitely have the left hand sides are the same.
Let's see if the right hand sides are the same.
Before we move on let's see if we can find the sum and difference of 
and 
.
We will need a common denominator. How about 12? 12 works because 4 and 6 go into 12. That is 4(3)=12 and 6(2)=12.
.
.
Let's go back to our identity now:
We can rearrange the right hand side inside the ( ) using commutative property of addition:
So comparing my left hand side to their left hand side we see that the blank should be cos.
