Consider the set of data

110, 112 ,120, 122, 125, 126, 131, 134, 134 , 136 ,141, 142, 144 .

1. How many observations were used in the plot .

2. What is the range of the data set?

3. What is the median of the data set?

Question [2]:

1.If you have 19 observations What is the the location of the third quartile .

2.What is the the Meanof7, 6, 4, 8, 2, 5, 11 .

3.What is the the the quartileof the data5559464749495153545455.

4.What are the two basic types of data.

Question [3]:

A campus press polled a sample of 250 undergraduate students in order to study student attitude toward a proposed change in the dormitory regulations. Each student was to respond as support, oppose, or neutral in regard to the issue. The numbers were 67 support, 41 neutral, and 142 opposed .

(a) Tabulatethe results and calculate the relative frequencies for the response categories.

(b) Make Pie chart of students.

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Question [4]:For the following data Construct a histogram using equal-length intervals starting with [6.0, 6.3] where the right-hand endpoint is included but not the left-hand endpoint..

6.16.16.16.16.16.26.26.26.26.3 6.3 6.36.46.46.4 6.46.46.46.46.5

6.5 6.56.56.56.66.66.66.76.76.76.86.86.86.86.86.9 6.97.0 7.07.0

7.17.17.17.27.27.27.27.37.37.37.37.47.87.87.9.

Question [5](7pts): Calculate the sample standard deviationforthe data

3 , 5,7 ,7,8 .

Question [6]: Calculate the mean , Q_1, andQ₃ for the data

26, 30, 38 ,32 ,26 ,31.

Question [7] : Calculate r for the n = 4 pairs of observations

(2, 5) ,(1, 3) , (5, 6),(0, 2).

Question [8] :For the bivariate data set

x

1

2

7

4

6

y

5

4

1

3

2

Calculate the least squares estimates and find the least squares fitted line .