STA2023 Test 1 QUESTIONS
AND VERIFIED CORRECT
ANSWERS GRADED A+
[LATEST] 100% GUARANTEED
PASS
The test scores of 5 students are given:
x= 87, 66, 98, 74, and 90.
What is the value of Σx^2 and (Σx)^2? - CORRECT ANSWER-Σx^2= 35,105
(Σx)^2= 172,225
Under descriptive statistics, we study... - CORRECT ANSWER-the methods for organizing,
displaying, and describing data.
A quantitative variable is the one that can... - CORRECT ANSWER-- Assume numerical values
- Be graphed
- Be used to prepare tables
m= 6, 9, 12, 15, 18
f= 2, 5, 4, 6, 3
Find Σmf and Σm^2f and mean - CORRECT ANSWER-Σmf= 249
Σm^2f= 3375
mean= 12.45
Which is a continuous variable?
a. Types of boats by the U.S Coast Guard
, b. Lengths of top-ten hit songs
c. number of candles lit during Christmas
d. the outcome of a single coin flip - CORRECT ANSWER-b. lengths of top-ten hit songs
In Favor: 20
Against: 18
No opinion: 12
1) The % of people w/ no opinion is?
2) The relative frequency of the "against" category is?
3) The sample size is? - CORRECT ANSWER-1) 24%
2) .36
3) n=50
Cross-sectional data is collected: - CORRECT ANSWER-On different elements for the same
period of time
Score~~~~~~~f
61-70~~~~~~~ 3
71-80~~~~~~~ 9
81-90~~~~~~ 12
91-100~~~~~~ 6
What is...
1) Width for each class?
2) Midpoint or class mark for second class?
3) Lower boundary for 1st class?
4) Relative frequency of 4th class?
AND VERIFIED CORRECT
ANSWERS GRADED A+
[LATEST] 100% GUARANTEED
PASS
The test scores of 5 students are given:
x= 87, 66, 98, 74, and 90.
What is the value of Σx^2 and (Σx)^2? - CORRECT ANSWER-Σx^2= 35,105
(Σx)^2= 172,225
Under descriptive statistics, we study... - CORRECT ANSWER-the methods for organizing,
displaying, and describing data.
A quantitative variable is the one that can... - CORRECT ANSWER-- Assume numerical values
- Be graphed
- Be used to prepare tables
m= 6, 9, 12, 15, 18
f= 2, 5, 4, 6, 3
Find Σmf and Σm^2f and mean - CORRECT ANSWER-Σmf= 249
Σm^2f= 3375
mean= 12.45
Which is a continuous variable?
a. Types of boats by the U.S Coast Guard
, b. Lengths of top-ten hit songs
c. number of candles lit during Christmas
d. the outcome of a single coin flip - CORRECT ANSWER-b. lengths of top-ten hit songs
In Favor: 20
Against: 18
No opinion: 12
1) The % of people w/ no opinion is?
2) The relative frequency of the "against" category is?
3) The sample size is? - CORRECT ANSWER-1) 24%
2) .36
3) n=50
Cross-sectional data is collected: - CORRECT ANSWER-On different elements for the same
period of time
Score~~~~~~~f
61-70~~~~~~~ 3
71-80~~~~~~~ 9
81-90~~~~~~ 12
91-100~~~~~~ 6
What is...
1) Width for each class?
2) Midpoint or class mark for second class?
3) Lower boundary for 1st class?
4) Relative frequency of 4th class?
