Answer:
The probability of picking the first boyis 14/26 and the probability of picking another boy is 13/25. The combined probability is thus 14/26 x 13/25 = 7/25
Step-by-step explanation:
Answer: constant of proportionality = 2.5
Answer:
24
Step-by-step explanation:
20% of 30 = 6
30 - 6 = 24
With this type of graph with is called a Symetric Distribution graph, the mean iin the middle of the graph. the answer to your question is 50 is your mean. (and 50 is also your median)
Answer:
900 sample size
Step-by-step explanation:
To determine the sample size for a proportion, the margin of error formula is used to determine this:
Where p is the proportion, E is the margin of error, n is the sample size, q = 1 - p, is the z score.
Since the proportion is not known, the sample size needed to guarantee the confidence interval and error is at p = 0.5 and q = 1 - p = 1 - 0.5 = 0.5
E = 5% = 0.05, = 3. Hence: