Step-by-step explanation:
- 2x + 4 + 3 = -4
-2x+7= -4
-2x= -4-7
-2x= -11
x=-11/-2
x=11/2
x=5.5 (if u want the answer in decimal form)
X = 5 is a solution of the equation 3 – x = 8
Answer:
chi-square
Step-by-step explanation:
According to the given situation, Chi-square statistic would be considered for as we have to determine whether working hours and smoking are attached with each other or not.
To know whether working hours based on smoking or there is an important relationship between both- So Chi-square statistic would be used
Therefore the test that should be used is chi-square
Answers:
1.)
C - Final exams: midterm = Q3 92 - Q1 80 = 12 and finals = Q3 85 - Q1 78 = 7, so finals exam has the smaller IQR.
2.)
B - exam median is much higher than the class median: refer to the attached image of class and exam box and whisker graph
3.)
A - <span>
IQR is a better measure of spread for movies than it is for basketball games: because the data for movies are quite wide or apart from each other than the data in the basketball games
4.)
A - </span><span>
mean for April is higher than October's mean: mean in April is 67 and mean in October is 60
5.)
A - </span><span>
Neither data set has suspected outliers: meaning there's no data that is further apart from the group or set
6.)
B - </span>
There is a high data value that causes the data set to be asymmetrical for the males: the data for males are high and asymmetrical
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7.)
C - </span>
college spread is best described by the IQR. The high school spread is best described by the standard deviation: this is because of the wide range of data in the college than the data in the high school.
Because there's an even number of values in this set, there is two middle values rather than one (31 and 34). To find the median we need to add them together and divide the sum by 2 (31 + 34 = 65, 65/2= 32.5) Our final answer is 32.5.