I think, this is the correct inequality n < l 6 l
A standard deviation is 2500 miles, so the range of 25,000 to 37,500 is 2 standard deviations below, and 3 standard deviation above the mean of 30,000.
We aren't assuming anything about the distribution, but we sort of have to assume a normal distribution in order to answer. When you don't know anything about a distribution, this is generally what you do.
The general rule for standard deviations is:
+/- 1 SD: +/- 34% of population, for a total of 68%
+/- 2 SD: Another 14% in either direction, for a total of 96% of population.
+/- 3 SD, Another 2% in either direction, which pretty much captures the entire distribution (4 standard deviations from the mean is incredibly rare/unlikely)
We have a range of +/- 1 SD, so we know that 68% percent o the tire 'population' is captured in the range. We also have one more standard deviation in both directions, so we add 28% to this number to get 96% of the population. We have a third standard deviation above the mean, so we add another 2% to arrive at 98% of the population.
Answer is 98% of all such tires.
Answer:
b) 10 percent of all eighth-grade students at HACS are reading below grade level
Step-by-step explanation:
The sample is eight-grade students at High Achievers Charter School at a particular time and this forms a part of the total population of eight-grade students in the school. So we can conclude that for every eight-grade class in the school, 10% are reading below grade level.
Answer:
this is 93281
Step-by-step explanation:
because my experty its the answer????
