Answer:
Step-by-step explanation:
Data given and notation
n=250 represent the random sample taken
estimated proportion of readers owned a particular make of car
is the value that we want to test
z would represent the statistic (variable of interest)
represent the p value (variable of interest)
Concepts and formulas to use
We need to conduct a hypothesis in order to test the claim that that the percentage is actually different from the reported percentage.:
Null hypothesis:
Alternative hypothesis:
When we conduct a proportion test we need to use the z statistic, and the is given by:
(1)
The One-Sample Proportion Test is used to assess whether a population proportion 
is significantly different from a hypothesized value 
.
Calculate the statistic
Since we have all the info requires we can replace in formula (1) like this:
Answer:
69
Step-by-step explanation:
69
Answer:
2
Step-by-step explanation:
![x^{3} =8\\x=\sqrt[3]{8} \\x=2](https://tex.z-dn.net/?f=x%5E%7B3%7D%20%3D8%5C%5Cx%3D%5Csqrt%5B3%5D%7B8%7D%20%5C%5Cx%3D2)
use your calculator
Answer:
The standard deviation is 5.29 kg.
Step-by-step explanation:
The standard deviation is the square root of the variance. Mathematically, we have that:
In this problem, we have that:
So
The standard deviation is 5.29 kg.
Answer:
f(x) = -2x +9
Step-by-step explanation:
We can use the slope intercept form
y= mx +b where m is the slope and b is the y intercept
y = -2x +9
Replacing y with f(x)
f(x) = -2x +9
