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tekilochka [14]
2 years ago
12

To conduct an experiment, researches randomly select six students from a class of 20. How many different groups of six students

are possible?
Mathematics
1 answer:
enot [183]2 years ago
8 0

Answer:

3.33

Step-by-step explanation:

20 divided by 6 equals 3.33333333333

Round that you get 3.33

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Name the polygon. State whether it is convex or concave.
valina [46]

Answer:

Pentagon, convex

Step-by-step explanation:

All of the interior angles are less than 180. Hope this helps.

7 0
3 years ago
Read 2 more answers
PLEASE HELP ME
Wewaii [24]
7-5.5=1.5
so each drop leaf is 1.5
2×1.5=3
so 7 when both drop leafs are up
7-3=4
There's your answer
5 0
3 years ago
Read 2 more answers
Teen obesity:
Law Incorporation [45]

Answer:

95% confidence interval for the percentage of all U.S. public high school students who are obese is [0.110 , 0.190].

Step-by-step explanation:

We are given that 15% of a random sample of 300 U.S. public high school students were obese.

Firstly, the pivotal quantity for 95% confidence interval for the population proportion is given by;

                        P.Q. = \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where, \hat p = sample % of U.S. public high school students who were obese = 15%

           n = sample of U.S. public high school students = 300

           p = population percentage of all U.S. public high school students

<em>Here for constructing 95% confidence interval we have used One-sample z proportion statistics.</em>

<u></u>

<u>So, 95% confidence interval for the population proportion, p is ;</u>

P(-1.96 < N(0,1) < 1.96) = 0.95  {As the critical value of z at 2.5% level

                                             of significance are -1.96 & 1.96}  

P(-1.96 < \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } } < 1.96) = 0.95

P( -1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } < {\hat p-p} < 1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } ) = 0.95

P( \hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } < p < \hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } ) = 0.95

<u>95% confidence interval for p</u> = [\hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } } , \hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }]

  = [ 0.15-1.96 \times {\sqrt{\frac{0.15(1-0.15)}{300} } } , 0.15+1.96 \times {\sqrt{\frac{0.15(1-0.15)}{300} } } ]

  = [0.110 , 0.190]

Therefore, 95% confidence interval for the percentage of all U.S. public high school students who are obese is [0.110 , 0.190].

6 0
3 years ago
Help me, I need to answer a question: 50% of 15
harkovskaia [24]
50% is exactly half, so to find half of something you just divide it by 2= 7.5

Or you could multiply it

15 x 0.50=7.5
4 0
3 years ago
Read 2 more answers
Choose the point-slope form of the equation below that represents the line that passes through the point (-1, 6) and has a slope
alekssr [168]
For an eqtuaion wih slope m and goes through point (x1,y1)
equation is
y-y1=m(x-x1)

so
point (-1,6)
slope=-3
y-6=-3(x-(-1))
y-6=-3(x+1)

2nd one
8 0
3 years ago
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