Answer:
Hello!!
If the ratio of girls to boys in a class is 3:5, the fraction of the class that are girls is...

Hope this helps!!
Answer:
It definitely seems right, so you should be good!
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Answer:
a) Statistic.
b) The population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.
Step-by-step explanation:
a) The proportion of 30% is a statistic, as it is a value that summarizes data only from the sample taken in the study from USA Today. Other samples may yield different proportions.
b) We can use the statistic to estimate a confidence interval for the parameter of the population.
The standard error for the proportion is calculated as:

The margin of error is 0.01. We can use this value to determine the level of confidence that represents.
The formula for the margin of error is:

This z-value, according to the the standard normal distribution, corresponds to a confidence interval of 94%.
The interval for this margin of error is:

Then, we can conclude that the population proportion is expected to be between 0.29 and 0.31 with a 94% degree of confidence.
Answer:
-2
Step-by-step explanation:
6x+3y=-6
-6-6x=3y
divided by 3
-2-2x=y
Answer:
The three most common ways to find a sample space are: To List All the Possible Outcomes. Create a Tree-Diagram. Use a Venn Diagram.
For example, let's suppose we flip a coin and roll a die.
1. How many outcomes are possible?
2. What is the probability space?
3. Identify the events.
Step-by-step explanation:
sorry