Answer:
3f - 2f = 6 + 23( collection of like terms)
f = 29
Answer:
9.7%
Step-by-step explanation:
Given data
Expected value= 277
Actual value= 250
%Error= Actual- Expected/Expected *100
%Error= 250-277/277 *100
%Error= 27/277 *100
%Error= 0.097*100
%Error= 9.7
Hence the error is 9.7%
Answer the question
all real number
interval notation
Step-by-step explanation:
Answer:
Step-by-step explanation:
Use the x-swap-y method to find the inverse:
Answer: No, the average age is not higher than originally believed.
Step-by-step explanation:
Since we have given that
Sample size = 20
Mean = 63.7 years
Standard deviation = 1.9 years
So, Hypothesis:
So, the value of test statistic would be
At α = 0.01 level of significance,
critical value z = 2.58
Since 2.58>0.471
so, We will accept the null hypothesis.
Hence, No, the average age is not higher than originally believed.