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san4es73 [151]
3 years ago
14

STUDENT HOURS Jack 4.5 Mike 6.25 Adam 3 Jim 2.5 Marty 7 Ben 6.75 At your high school, you randomly surveyed male students to fin

d that they play video games a certain amount of hours per week. What is the estimated population mean based on your sample? A) 2.5 hours B) 3 hours C) 5 hours D) 6 hours
Mathematics
1 answer:
trasher [3.6K]3 years ago
7 0

Answer:

C) 5 hours

Step-by-step explanation:

Find the mean of the sample

Add the numbers together and divide by the number of points

mean = ( 4.5 + 6.25 + 3+ 2.5+ 7 + 6.75)/6

         =30/6

          =5

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Use the formula C(n, x)pxqn − x to determine the probability of the given event. (Round your answer to four decimal places.) The
miskamm [114]

Answer: 0.1334

Step-by-step explanation:

Given

There are seven trails with a probability of success is  p=\frac{1}{4}

\therefore q=1-p\\q=1-\frac{1}{4}\\q=\frac{3}{4}

Using the binomial distribution, the Probability of exactly no success i.e. x=0 is given by

\Rightarrow ^7C_0\cdot p^0 \cdot q^{7-0}\\\Rightarrow 1\times(\frac{1}{4})^0 \cdot (\frac{3}{4})^7\\\Rightarrow 1\times 1 \cdot (0.75)^7\\\Rightarrow 0.1334

7 0
3 years ago
Help!!!
Artyom0805 [142]

Answer:

  C:  y+7=2/5(x+4)

Step-by-step explanation:

The point-slope form of the equation of a line with slope m through point (h, k) is ...

  y -k = m(x -h)

You are given m=2/5 and (h, k) = (-4, -7). Put these numbers into the form and simplify the signs:

  y -(-7) = 2/5(x -(-4)) . . . . . numbers put into the form

  y +7 = 2/5(x +4) . . . . . . . signs simplified . . . . matches choice C

5 0
3 years ago
Determine whether the situation is linear or nonlinear, and proportional or nonproportional
Arlecino [84]

Answer:

  linear and non-proportional

Step-by-step explanation:

When the same amount is added each week, the relationship is linear. When the initial value is 50, not zero, the relationship is non-proportional.

6 0
4 years ago
48:PLEASE HELP Find the x-intercept of -x+2y=22
ella [17]

Answer:

-22

Step-by-step explanation:

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3 0
4 years ago
What is equation for the line that is perpendicular to y-3=-4(x+2) and passes through the point (-5,7)
jekas [21]

Answer:

y-7=1/4(x+5)

Step-by-step explanation:

y-3=-4(x+2)

y=-4x-8+3

y=-4x-5

-----------

y-y1=m(x-x1)

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y-7=m(x+5)

perpendicular means negative reciprocal of the slope,

so the slope will be 1/4

y-7=1/4(x+5)

4 0
4 years ago
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