How can u Simplify negative 9 over 6 divided by 3 over negative 2. .
1 answer:
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Answer:
a) We want to test the claim that 35% of adults have heard of the new electronic reader, then the system of hypothesis are.:
Null hypothesis:
Alternative hypothesis:
And is a two tailed test
b)
c)
d) Null hypothesis:
e) Fail to reject the null hypothesis because the P-value is greater than the significance level, alpha.
Step-by-step explanation:
Information provided
n=1562 represent the random sample selected
X=522 represent the people who have heard of a new electronic reader
estimated proportion of people who have heard of a new electronic reader
is the value to verify
represent the significance level
z would represent the statistic
represent the p value
Part a
We want to test the claim that 35% of adults have heard of the new electronic reader, then the system of hypothesis are.:
Null hypothesis:
Alternative hypothesis:
And is a two tailed test
Part b
The statistic for this case is given :
(1)
Replacing the info given we got:
Part c
We can calculate the p value using the laternative hypothesis with the following probability:
Part d
The null hypothesis for this case would be:
Null hypothesis:
Part e
The best conclusion for this case would be:
Fail to reject the null hypothesis because the P-value is greater than the significance level, alpha.
a) You are told the function is quadratic, so you can write cost (c) in terms of speed (s) as
... c = k·s² + m·s + n
Filling in the given values gives three equations in k, m, and n.
Subtracting each equation from the one after gives
Subtracting the first of these equations from the second gives
Using the next previous equation, we can find m.
Then from the first equation
[tex]28=100\cdot 0.01+10\cdot (-1)+n\\\\n=37[tex]
There are a variety of other ways the equation can be found or the system of equations solved. Any way you do it, you should end with
... c = 0.01s² - s + 37
b) At 150 kph, the cost is predicted to be
... c = 0.01·150² -150 +37 = 112 . . . cents/km
c) The graph shows you need to maintain speed between 40 and 60 kph to keep cost at or below 13 cents/km.
d) The graph has a minimum at 12 cents per km. This model predicts it is not possible to spend only 10 cents per km.
Given:
Speed limit on a highway is 110 km per hour.
Let x be the speed of the car in time 't'
time when taken for a car to travel 132km.
It takes minimum 1 hour 12 minutes