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lilavasa [31]
3 years ago
10

PLEASE HELP FAST ...A museum surveyed three groups of 5 members to find out how many times the members visited the zoo in the pa

st year. The table shows the results of the three samples.
Survey Visits to the Museum
Group 1 {4, 10, 6, 3, 8}
Group 2 {3, 1, 2, 1, 2}
Group 3 {7, 9, 3, 4, 7}
Identify any surveys that are likely biased. Based on the unbiased surveys, estimate the mean number of visits per member in the past year.

Enter your answer in the box. Round to the nearest whole number
Mathematics
2 answers:
Sauron [17]3 years ago
6 0
I think the group 2 survey is likely to be biased towards people who are not too keen on zoos since all the values are small.
From group 1 and 3 the mean number of visits are
     (4 + 10 + 6 + 3 + 8 + 7 + 9 + 3 + 4 + 7) / 10 

=   61/10

mean = 6
olga nikolaevna [1]3 years ago
6 0
Group 2 is biased.

mean number of visits = (4+10+6+3+8+7+9+3+4+7)/10 = 61/10 = 6.1
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Suppose you have a bag of jelly beans: 7 yellow, 3 green, 6 red, 4 purple. All of the
Len [333]

Answer:

I would say that the answer is 4/20

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Llana [10]

a) The given function is

f(x)=\frac{x^2-4}{x^4+x^3-4x^2-4}

The domain refers to all values of x for which the function is defined.

The function is defined for

x^4+x^3-4x^2-4\ne0

This implies that;

x\ne -2.69,x\ne 1.83

b) The vertical asymptotes are x-values that makes the function undefined.

To find the vertical asymptote, equate the denominator to zero and solve for x.

x^4+x^3-4x^2-4=0

This implies that;

x= -2.69,x=1.83

c) The roots are the x-intercepts of the graph.

To find the roots, we equate the function to zero and solve for x.

\frac{x^2-4}{x^4+x^3-4x^2-4}=0

\Rightarrow x^2-4=0

x^2=4

x=\pm \sqrt{4}

x=\pm2

The roots are x=-2,x=2

d) The y-intercept is where the graph touches the y-axis.

To find the y-inter, we substitute;

x=0 into the function

f(0)=\frac{0^2-4}{0^4+0^3-4(0)^2-4}

f(0)=\frac{-4}{-4}=1

e) to find the horizontal asypmtote, we take limit to infinity

lim_{x\to \infty}\frac{x^2-4}{x^4+x^3-4x^2-4}=0

The horizontal asymtote is y=0

f) The greatest common divisor of both the numerator and the denominator is 1.

There is no common factor of the numerator and the denominator which is  at least a linear factor.

Therefore the function has no holes.

g) The given function is a proper rational function.

There is no oblique asymptote.

See attachment for graph.

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2 years ago
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nasty-shy [4]

Answer:

f(x) = 1/(x+2) + 7

Step-by-step explanation:

The graph depicts the line of 1/x shifted to the left by 2 and up by 7.:

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2 years ago
Q is the midpoint for the points S(11, -6) and T(-1, 10). Find the length of segment QT.<br> QT=
iris [78.8K]

Answer:

10

Step-by-step explanation:

QT=ST/2=√(12^2+16^2)/2=10

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2 years ago
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