HELPPP ME PLS AND THXS

Mathematics

2 answers:

larisa [96]2 years ago

5 0

Answer:

Step-by-step explanation:

"all real numbers greater than or equal to -9" is correct. The vertex of this parabolic graph is (1, -9). To the left of 1, or to the right of 1, the graph continues upward without bound.

photoshop1234 [79]2 years ago

4 0

Answer:

B. all real numbers greater than or equal to 1

Step-by-step explanation:

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The histogram shows the speeds of downhill skiers during a competition. Estimate the mean of the data set displayed in the histo

Ostrovityanka [42]

Answer:

≈50.6

Step-by-step explanation:

Not sure what precision level this problem is looking for, but for right-skewed distributions, we know that the mean is going to be pulled right and therefore the mean should be larger than the median. To a high confidence level, the mean should fall between 50 and 59, or in the third column.

If a single estimation is wanted, assume the values inside each column are uniformly distributed:

$\displaystyle\\\widehat{\mu}=\frac{34.5\cdot 4+...+74.5\cdot 2}{4+9+4+4+2}\approx \boxed{50.6}$