Answer:
y=63
x=63
z=72
Step-by-step explanation:
Answer:
H0: μ = 7.8
Ha: μ > 7.8
Step-by-step explanation:
The null hypothesis (H0) tries to show that no significant variation exists between variables or that a single variable is no different than its mean. While an alternative Hypothesis (Ha) attempt to prove that a new theory is true rather than the old one. That a variable is significantly different from the mean.
For the case above;
Let μ represent the true mean length of long-distance calls after the rate reduction
The null hypothesis is that true mean length of long-distance calls after the rate reduction is the same and equal to 7.8 minutes
H0: μ = 7.8
The alternative hypothesis is that the true mean length of long-distance calls after the rate reduction have increased that is greater than 7.8 minutes
Ha: μ > 7.8
Answer:
14. 8 < 4x
15. 8 - 4x
Step-by-step explanation:
Eight -> Number 8
Less than -> Inequality Words -> Less than sign (<)
Decreased -> Negative Words -> Subtract
Times -> Multiply
'A Number' -> A hidden variable -> Typically known as 'x'
Step-by-step explanation:
the solution is in the picture
