Answer:
The null and alternative hypothesis for this test are
Step-by-step explanation:
If we perform a hypothesis test, we can reject or not reject the null hypothesis.
To conclude that the tires have a decreased stopping distance (μ<215), we should state the null hypothesis 
and then go on with the analysis to reject it (or not).
If the null hypothesis is rejected, the claim of the manufacturer is rigth.
The alternative hypothesis would be 
, that would turn rigth if the null hypothesis is rejected.
9×2=18. add the tow zeros like this 9×2=18+00=1,800
The total amount that Chang will received from his wages is the product of his hourly wage times the number of hours he has worked (n). His total savings should not be less than $125. The equation that best describes the situation is,
45 + 7n ≥ 125
Solving for n in the inequality gives an answer of n≥11.42 hours. Thus, he needs to work for at least 12 hours.
Mean = average = (sum of numbers) / (count of numbers)
= 84 / 12 = 7
Median
Arrange the numbers from least to greatest
1.8, 2.5, 2.6, 4.4, 4.4, 7.3, 8.0, 9.5, 10.3, 10.4, 11.1, 11.7
The middle numbers are 7.3 and 8. The average of these numbers is 7.65
Mode: Which among the numbers appear more frequently. That is 4.4
Range: 1.8 to 11.7
Step-by-step explanation:
it is equal to zero because n/m where n is the numerator and m is the denominator.
any number where the numerator is zero, the answer will be zero. Zero divided by any number is zero.
For -3.08+3.08=0, and since it is part of the numerator it becomes 0/3.08•4.66 which equals to 0
