<span>The normal approximation to a binomial can be used for a significance test on the population proportion p if np > 15.
</span>
<span>a. n = 10 and H0: p = 0.4. => np = 10(0.4) = 4 [can not be used]
b. n = 100 and H0: p = 0.6. => np = 100(0.6) = 60 [can be used]
c. n = 1000 and H0: p = 0.996. => np = 1000(0.996) = 996 [can be used]
d. n = 500 and H0: p = 0.3.</span> => np = 500(0.3) = 150 [can be used0
You have to get to equal terms
So you have to multiply top and bottom of the left side by 3-x and you have to multiply top and bottom of the right side by x-3
Answer is -x2 (neg x squared) -6x +9
Answer:
I THINK 20 mm
Step-by-step explanation:
We should each breakdown the probability first for scarves, gloves and hat.
Probability of choosing brown scarf = 1/4
<span>Probability of choosing black gloves = 1/3
</span>There may be no specification of the hat so it is still random, any color of the two hats is possible.
Multiply these probabilities together:
1/4 x 1/3 x 2 = 1/6
The probability of this combination of clothes together is 1/6