Answer:
a. Describing a sample with mean and standard deviation.
Step-by-step explanation:
Statistics can be categorized into descriptive and inferential statistics.
descriptive statistics uses data for descriptions through numerical analysis. It can be further divided in four parts.
- Measures of Central Tendency ( Mean, Median, and Mode)
- Measures of Frequency (Count, Percent, Frequency)
- Measures of Position (Percentile Ranks, Quartile Ranks.)
- Measures of Dispersion ( Range, Standard Deviation)
Inferential statistics however is based on assumptions and conclusions and generalizations drawn from samples or checks.
options b to d are all examples of inferential statistics while option a is an example of descriptive statistics.
Answer:
Step-by-step explanation:
Ivan and 3 others were evenly matched.
1+3=4
So there were 4 grandmas on the other team. :)
Let n = the hours elapsed when the two trains are 660 miles apart.
Let the first train travel east and the second train travel west.
The distance traveled by the first train is
x = (50 mi/h)*(n h) = 50n mi
The distance traveled by the second train is
y = (60 mi/h)*(n h) = 60n h
The distance between the two trains after n hours is
x + y = 50 n + 60n = 110n mi
Because this distance is 660 miles, therefore
110n = 660
n = 6 hours
Answer: 6 hours
I hope this helps. Sorry it took so long
Answer: 
Step-by-step explanation:
To solve this exercise you need to remember the following properties:
1. The Distributive property states that:
2. The Addition property of Equality statest that:
If 
, then 
3. The Subtraction property of Equality statest that:
If , then 
4. The Division property of Equality statest that:
If , then 
5. The Multiplication property of Equality statest that:
If , then 
Given the equation:
You must solve for "g" in order to find its value:
- Apply the Distributive property:
- Apply the Addition property of Equality adding 30 to both sides of the equation:
- Apply the Division property of Equality dividing both sides by 2:
