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2 years ago

Identify a variable that you would expect have a left-skewed shape, a right-skewed shape, and a symmetrical shape.

1 answer:

7 0

Years of education vs salary is right skewed. typically the more education you have the more you make

baby-food eaten vs age is left skewed. typically the younger the cold the more they eat baby food

grades on a test are generally normally distributed. lots and lots of averages, or C's, typically fewer As and Fs

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Which expression is equivalent to: (5⁹ × 5⁻⁷)⁻² ?

lutik1710 [3]

Answer:

(6^4 x 2^-9)

Step-by-step explanation:

4 0

2 years ago

According to a study done by a university student, the probability a randomly selected individual will not cover his or her mou

solniwko [45]

Complete Question

According to a study done by a university student, the probability a randomly selected individual will not cover his or her mouth when sneezing is 0.267 Suppose you sit on a bench in a mall and observe people's habits as they sneeze

(a) What is the probability that among 18 randomly observed individuals exactly 6 do not cover their mouth when sneezing?

Answer:

$P(X=6)=(0.162)$

Step-by-step explanation:

From the question we are told that:

Sample size $n=18$

Probability $P=0.267$

No. that do not cover their mouth when sneezing $x=6$

Generally the equation for The Binomial distribution is mathematically given by

Parameters

B(18,0.267)

Therefore

$P(X=x)=(18..x)(0.267)^x(1-0.267)^{18-x}$

Where

$x=6$

Therefore

$P(X=6)=(18..6)(0.267)^6(1-0.267)^{18-6}$

$P(X=6)=(0.162)$

5 0

2 years ago

what is the equation of the line passing through the points 2/5 19/20 and 1/3 and 11/12 is a slope intercept form

serg [7]

Answer:

y= (1/2)x+(3/4)

Step-by-step explanation:

7 0

2 years ago

If Olivia has 68,79, and 74 for his 3 tests, what must he get on his 4th test in order to have an 80 average?

schepotkina [342]

The other person did not explain so I will:
(68+79+74)= 221/3 =73.7
80 x 4 = 320
320-221 = 99
He must get 99 on his 4th test.
Thanks

3 0

2 years ago

What types of solutions will a quadratic equation have when the discriminant b2 − 4ac in the quadratic formula is a perfect squa

netineya [11]

<em>The discriminant must be zero.</em>

Step-by-step explanation:

A Perfect-Square Trinomial is given by the form:

$(\alpha x \pm \beta)^2=(\alpha^2x^2 \pm 2\alpha x \beta + \beta^2)$

The discriminant in the quadratic formula is:

$\Delta=b^2-4ac \\ \\ \\ Here: \\ \\ a= \alpha^2 \\ \\ b=2\alpha \beta \\ \\ c=\beta^2 \\ \\ \\ So: \\ \\ \Delta=(2\alpha \beta )^2-4(\alpha^2)(\beta^2) \\ \\ \Delta=4\alpha^2 \beta^2-4\alpha^2 \beta^2=0$

So in order to get a perfect square,<em> the discriminant must be zero.</em>

<h2>Learn more:</h2>

Discriminant: brainly.com/question/1537997

#LearnWithBrainly

4 0

3 years ago