1.Find the range, standard deviation, and variance for the following sample data
ID: 2956998 • Letter: 1
Question
1.Find the range, standard deviation, and variance for the following sample data:98, 2, 53, 61, 15, 87, 63, 63, 91, 29, 96, 79, 93, 40, 5, 62
2.. A student scored 68 percent on a test, and was in the 52nd percentile. Explain these two numbers.
3.In each of the four examples listed below, one of the given variables is independent (x) and one of the given variables is dependent (y). Indicate in each case which variable is independent and which variable is dependent.
I. Course grade; Test score
II. DNA of parents; DNA of offspring
III. Prescription dosage; Weight of child
IV. Blood alcohol level; Alcohol consumption
4.A sample of purchases at the local convenience store has resulted in the following sample data, where x = the number of items purchased per customer and f = the number of customers.
x= 1 2 3 4 5
f= 8 20 8 8 7
· What does the 20 stand for in the above table?
· Find the midrange of items purchased.
· How many items were purchased by the customers in this sample?
Explanation / Answer
1. Find the range, standard deviation, and variance for the following sample data: 98, 2, 53, 61, 15, 87, 63, 63, 91, 29, 96, 79, 93, 40, 5, 62 Range: 2-98 Standard Deviation: 31.32 (using Excel, =stdevp(all the scores) Variance: 980.8711 (Excel, =varp(scores) 2.. A student scored 68 percent on a test, and was in the 52nd percentile. Explain these two numbers. There score, X, was 68. This was in the 52nd percentile meaning that this score was in the top 48 (100-52) % of the scores, or bottom 52%. 52% of the people scored lower than this X. 3.In each of the four examples listed below, one of the given variables is independent (x) and one of the given variables is dependent (y). Indicate in each case which variable is independent and which variable is dependent. I. Course grade (y); Test score (x) II. DNA of parents (x); DNA of offspring (y) III. Prescription dosage (y); Weight of child (x) IV. Blood alcohol level (y); Alcohol consumption (x) 4.A sample of purchases at the local convenience store has resulted in the following sample data, where x = the number of items purchased per customer and f = the number of customers. x= 1 2 3 4 5 f= 8 20 8 8 7 · What does the 20 stand for in the above table? · Find the midrange of items purchased. · How many items were purchased by the customers in this sample? -20 people purchased 2 items. -Midrange is 3. (max x + min x) / 2 . (5 + 1) / 2 = 3 - 139 total items purchased. Hope this helps :)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.