Answer:
Step-by-step explanation:
The null hypothesis is the hypothesis that is assumed to be true. It is an expression that is the opposite of what the researcher predicts.
The alternative hypothesis is what the researcher expects or predicts. It is the statement that is believed to be true if the null hypothesis is rejected.
From the given situation,
news article says that high school students are currently spending an average of 15 hours per week doing homework online. This is the null hypothesis.
H0: µ = 15 hours
You don't think this is an accurate estimate, although you're not sure whether the real value is higher or lower. This is the alternative hypothesis.
Ha : µ ≠ 15 hours
Answer:
t = -1.24
Step-by-step explanation:
From the equation;
t = 0.0119s² - 0.308 s -0.0003
Where t is the change in a runner's performance, and s is the tail wind speed.
But s = 5 m/s
Therefore;
t = 0.0119 (5²) - 0.308(5) -0.0003
= 0.2975 - 1.54 - 0.0003
= - 1.2428
Since, negative means a runner finishes with a lower time, then;
t = -1.2428 to the nearest hundredth
= -1.24
Answer:10
Step-by-step explanation:
52/5
Let z be any number (like x would be)
if we set z equal to 2x-6y, then we get z = 2x-6y
The system
2x-6y = 8
2x-6 = 3
turns into this new system
z = 8
z = 3
but z is a single number. It can't be both 8 and 3 at the same time. So there are no solutions