Mathematics, 25.02.2020 21:53, dudeguy3593
Are the marks one receives in a course related to the amount of time spent studying the subject? To analyze this mysterious possibility, a student took a random sample of 10 students who had enrolled in an accounting class last semester. He asked each to report his or her mark in the course and the total number of hours spent studying accounting. These data are listed here.
Marks
Time Spent Studying
77
40
63
42
79
37
86
47
51
25
78
44
83
41
90
48
65
35
47
28
Enlarge Table
a.
Calculate the covariance.
b.
Calculate the coefficient of correlation.
c.
What do the statistics calculated above tell you about the relationship between marks and study time?
A. First, do the calculations for covariance and coefficient of correlation using only Excel's add/Sum, subtract, multiply, divide functions (OK, use ^2 (to square a number) )
B. Then calculate the covariance and coefficient of correlation using Excel's CORREL and COVAR functions
C. What do the statistics calculated above tell you about the relationship between marks and study time?
Answers: 1
Mathematics, 21.06.2019 14:30, meramera50
Find the arc length parameter along the given curve from the point where tequals=0 by evaluating the integral s(t)equals=integral from 0 to t startabsolutevalue bold v left parenthesis tau right parenthesis endabsolutevalue d tau∫0tv(τ) dτ. then find the length of the indicated portion of the curve r(t)equals=1010cosine tcost iplus+1010sine tsint jplus+88t k, where 0less than or equals≤tless than or equals≤startfraction pi over 3 endfraction π 3.
Answers: 3
Mathematics, 21.06.2019 16:00, 4tazaouiamine1r
Whose conclusion is correct? choose all that apply. (two max) elijah emily edward esme
Answers: 2
Mathematics, 21.06.2019 18:30, JvGaming2001
School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?
Answers: 2
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