Answer: A. 664
Step-by-step explanation:
Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.
But there is no information regarding the population proportion is mentioned.
Formula to find the samples size , if the prior estimate to the population proportion is unknown :
, where E = Margin of error.
z* = Two -tailed critical z-value
We know that critical value for 99% confidence interval = 
[By z-table]
Margin of error = 0.05
Then, the minimum sample size would become :
Simplify,
Thus, the required sample size= 664
Hence, the correct answer is A. 664.
The value of the expression 1/√2 + π where the given parameters are π = 3.141 and √2 = 1.414 is 3.848
<h3>How to evaluate the expression?</h3>
The given parameters are
π = 3.141
√2 = 1.414
The expression to evaluate is given as:
1/√2 + π
Start by substituting π = 3.141 and √2 = 1.414 in the expressions 1/√2 + π
1/√2 + π = 1/1.414 + 3.141
Evaluate the quotient
1/√2 + π = 0.707 + 3.141
Evaluate the sum
1/√2 + π = 3.848
Hence, the value of the expression 1/√2 + π where the given parameters are π = 3.141 and √2 = 1.414 is 3.848
Read more about expressions at:
brainly.com/question/723406
#SPJ1
<u>Complete question</u>
By taking π = 3.141 and √2 = 1.414, evaluate 1/√2 + π up to three places of decimals.
Answer:
what
Step-by-step explanation:
Answer:
The slope is 2/3 and the y intercept is 5/9
Step-by-step explanation:
This is written in the form
y= mx+b where m is the slope and b is the y intercept
y = 2/3x +5/9
m = 2/3 and b=5/9
The slope is 2/3 and the y intercept is 5/9
Answer: 1,599,960
Step-by-step explanation:
Since the population of crawfish in a section of the Louisiana bayou increased from 900,000 to 1.2 million between 2010 and 2011. The percentage increase in population will be:
= (1.2 million - 900000) / 900000 × 100
= 300000/900000 × 100
= 33.33%
Since the population increases by the same percentage between 2011 and 2012, then the population in 2012 will be:
= (100% + 33.33%) × 1.2 million
= 133.33% × 1.2 million
= 1.3333 × 1.2 million
= 1,599,960
The population in 2012 is 1,599,960
