A sheriff is interested in the average speed that people drive on Highway 50. Match the vocabulary word with its corresponding e
xample.
1 answer:
Answer:
1. Statistics
2. Sample
3. Population
4. Variable
5. Data
6. Parameter
Step-by-step explanation:
1. Statistics is the mean of the sample taken - The average speed that the 250 randomly selected drivers drove on Highway 50
2. Sample is the representative part of the population - The 250 randomly selected drivers who were on Highway 50
3. Population is the group of people from which the sample was taken - All people who drive on Highway 50
4. Variable is a quantity that has values which differ - The speed that a driver drives on Highway
5. Data is information obtained used for a specific purpose - The list of the 250 speeds that the drivers studied drove
6. Parameter is the mean of a population - The average speed that all drivers go on Highway 50
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Answer: 6 customers
Step-by-step explanation:
From the pie chart,
Given;
Cookies and creams = 24%
Mint chocolate chips = 28%
Straw berry = 20%
Vanilla = 12
Butterscotch = 16
No of customers = 25
Solution
How many of the 25 customers named cookies and cream
= 25 x 24/100
= 25 x 0.24
= 6 customers
6 customers named cookies and cream
Answer:
Approximately normal for large sample sizes
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
In this question:
The distribution is unknown, so the sampling distribution will only be approximately normal when n is at least 30.
So the correct answer should be:
Approximately normal for large sample sizes