Answer:
Observational study
Step-by-step explanation:
There are 3 types of statistical study:
1) Experimental: Under this, any experiment is done on a certain group of population.
2) Observational: Under this study, the events are observed regularly and the record is made.
3) Survey : Under this study, a survey is conducted with a a group of population and the record is made.
According to question, A meteorologist keeps hourly temperature records over the course of several years in order to look for long-term variations, this is an example of <u>observational study</u>.
Answer:
Step-by-step explanation:
Looking at the information given, the average or mean lowest prices and standard deviations for the two cities are given. The standard deviation is a measure of variability. It is used to determine how far the values in the data are from the mean. A lower standard deviation means that the values are closer to the mean. A higher standard deviation means that the values are farther from the mean.
Since 0.07 is lower than 0.23, the correct statement that is true about their gas-price data is
Raquel's data are most likely closer to $3.42 than Van's data are to $3.78.
Answer:
YB = 12
Step-by-step explanation:
The product of the measures of the parts of one chord are equal to the product of the measures of the parts of the other chord, that is
7YB = 6 × 14 = 84 ( divide both sides by 7 )
YB = 12
Answer:
Range, median & mean .....
Answer: DF = 4 in
Step-by-step explanation:
Here in triangle DEF,
In which DE = 4, 
, and 
Since, 
⇒ 
⇒ 
⇒ 
Thus, first option is correct.
