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FromTheMoon
12 days ago
13

A random sample of 121 bottles of cologne showed an average content of 4 ounces. It is known that the standard deviation of the

contents (i.e., of the population) is 0.22 ounces. In this problem the 0.22 is
Select one:

a. a parameter.

b. the standard error of the mean.

c. a statistic.

d. the average content of colognes in the long run.
Mathematics
1 answer:
Svet_ta [9.5K]12 days ago
8 0
a. a parameter. A parameter denotes a characteristic that describes the entire population, while a statistic pertains to a specific sample. In this case, the mean content of 4 ounces reflects a sample statistic, whereas the standard deviation of 0.22 ounces represents a parameter.
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Which are the roots of the quadratic function f(b) = b2 – 75? Select two options. b = 5 StartRoot 3 EndRoot b = Negative 5 Start
zzz [9093]

Answer:

b = 5√3

b = -5√3

Step-by-step explanation:

We have

f(b)=b^{2}-75

Keep in mind, the root of a function corresponds to the value of x at which the function's output is zero.

In this case

The roots of the equation are the b values for which f(b) equals zero.

Thus

For f(b)=0

b^{2}-75=0

b^{2}=75

Take the square root of both sides

b=(+/-)\sqrt{75}

Now simplify

b=(+/-)5\sqrt{3}

b=5\sqrt{3}  and b=-5\sqrt{3}

So we find that

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b = -5√3

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\frac{y}{3b-7} =x

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