1
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Let us mark ten student heights on the number line.

2
00:00:04,266 --> 00:00:06,710
one hundred thirty-eight.

3
00:00:06,800 --> 00:00:09,244
one hundred forty-two.

4
00:00:09,333 --> 00:00:11,873
one hundred forty-five.

5
00:00:11,933 --> 00:00:14,377
one hundred forty-two.

6
00:00:14,466 --> 00:00:16,742
one hundred fifty.

7
00:00:16,800 --> 00:00:19,244
one hundred thirty-eight.

8
00:00:19,333 --> 00:00:21,873
one hundred forty-five.

9
00:00:21,933 --> 00:00:24,425
one hundred forty-eight.

10
00:00:24,533 --> 00:00:26,977
one hundred forty-two.

11
00:00:27,066 --> 00:00:29,606
one hundred forty-five.

12
00:00:30,466 --> 00:00:33,030
This is the smallest height.

13
00:00:33,533 --> 00:00:36,025
This is the tallest height.

14
00:00:36,533 --> 00:00:40,393
From smallest to tallest, this is the range.

15
00:00:40,933 --> 00:00:43,905
These two heights appear most often.

16
00:00:44,466 --> 00:00:47,870
More in the middle, fewer at the ends.

17
00:00:51,466 --> 00:00:55,038
Let us mark eight test scores on the number line.

18
00:00:55,600 --> 00:00:57,420
eighty-five.

19
00:00:57,533 --> 00:00:59,185
ninety.

20
00:00:59,266 --> 00:01:01,086
eighty-five.

21
00:01:01,200 --> 00:01:03,188
ninety-five.

22
00:01:03,266 --> 00:01:05,086
eighty-five.

23
00:01:05,200 --> 00:01:06,852
ninety.

24
00:01:06,933 --> 00:01:08,681
eighty-eight.

25
00:01:08,733 --> 00:01:10,625
ninety-two.

26
00:01:11,533 --> 00:01:14,145
This is the smallest score.

27
00:01:14,666 --> 00:01:17,206
This is the tallest score.

28
00:01:17,733 --> 00:01:21,593
From smallest to tallest, this is the range.

29
00:01:22,133 --> 00:01:24,961
This score appears most often.

30
00:01:31,266 --> 00:01:35,006
These are the weekly reading hours of twelve students.

31
00:01:38,333 --> 00:01:41,425
How many data points were collected?

32
00:01:44,466 --> 00:01:46,790
Twelve data points.

33
00:01:48,933 --> 00:01:51,713
What is the range of reading time?

34
00:01:54,800 --> 00:01:57,076
From one to seven.

35
00:01:58,333 --> 00:02:01,473
What is the most frequent reading time?

36
00:02:04,533 --> 00:02:06,593
Four hours.

37
00:02:07,666 --> 00:02:11,286
How many students read more than four hours?

38
00:02:14,333 --> 00:02:16,465
Four students.

39
00:02:19,000 --> 00:02:24,540
Here are three dot plots. Watch their distribution shapes.

40
00:02:34,533 --> 00:02:37,313
Look at their distribution shapes.

41
00:02:40,333 --> 00:02:43,713
Here is the dot plot for these twelve numbers.

42
00:02:47,066 --> 00:02:49,558
What is the range of the data?

43
00:02:52,600 --> 00:02:54,996
From three to seven.

44
00:02:56,266 --> 00:02:59,238
Which value appears most often?

45
00:03:02,333 --> 00:03:03,865
Five.

46
00:03:06,400 --> 00:03:10,212
These are the weekly TV watching hours of a class.

47
00:03:13,533 --> 00:03:16,985
What is the most common TV watching time?

48
00:03:20,066 --> 00:03:22,558
Three and four hours.

49
00:03:23,600 --> 00:03:27,556
How many hours does the most active student watch?

50
00:03:30,600 --> 00:03:32,492
Eight hours.

51
00:03:33,533 --> 00:03:37,825
If you watch five hours, is that more than most students?

52
00:03:40,866 --> 00:03:44,030
Yes, more than most students.