Maximum Wind Speeds The data show the maximum wind speeds in...

Name: Maximum Wind Speeds The data show the maximum wind speeds in miles per hour recorded for 40 states. Construct a frequency distribution using 7 classes. 59 78 62 72 67 76 92 77 64 83 64 70 67 75 75 78 75 71 72 93 68 69 76 72 85 64 70 77 74 72 53 67 48 76 59 87 53 77 70 63 Source: NOAA
Uploaded: 2022-01-24T23:35:09-08:00
Duration: 6 min 13 s
Channel: Evelyn Cunningham
Description: Maximum Wind Speeds The data show the maximum wind speeds in miles per hour recorded for 40 states. Construct a frequency distribution using 7 classes. 59 78 62 72 67 76 92 77 64 83 64 70 67 75 75 78 75 71 72 93 68 69 76 72 85 64 70 77 74 72 53 67 48 76 59 87 53 77 70 63 Source: NOAA

Maximum Wind Speeds The data show the maximum wind speeds in miles per hour recorded for 40 states. Construct a frequency distribution using 7 classes. 59 78 62 72 67 76 92 77 64 83 64 70 67 75 75 78 75 71 72 93 68 69 76 72 85 64 70 77 74 72 53 67 48 76 59 87 53 77 70 63 Source: NOAA

Transcript

00:01 So this data shows wind speeds in miles per hour recorded in 40 different states, and we are trying to construct a frequency distribution using seven classes.

00:12 So we want seven classes.

00:17 And in order to construct a frequency distribution, the first thing we need to determine is our class width.

00:24 And to find our class with, we're going to find the maximum piece of data.

00:28 We're going to subtract the minimum piece of data, and we're going to divide it by the number of classes.

00:35 So i've highlighted the maximum and minimum values.

00:40 So we'll take 93 minus 48, and we will divide by the fact that we want seven classes, which will lead us to six and three -sevenths, and you always round up.

00:56 So when we round up, we are going to have a class width of seven.

01:03 So to start your frequency distribution, we will start with the lowest number, which is 48, and we want seven numbers in that class.

01:17 So if you think in terms of counting up, we'd have 48, 49, 50, 51, 52, 53, and 54 in that class.

01:32 So that means the next class is going to have to start at 55.

01:39 And this first class is going to end at 54.

01:43 So if you haven't recognized a pattern yet, then really what we're doing is we're taking that class width and we're adding down.

01:52 So if i add the class with again, the next class will start at 62.

01:58 And if i add seven to that, the next class will start at 69.

02:08 And if i add the class width to that, the next class will start at 76, and then 83, and then 90.

02:17 So now we have the beginning of seven classes.

02:21 Now, if the third class starts at 62, then the second class has to end at 61.

02:29 And with the next one, if the fourth class starts at 69, the third class ends at 68.

02:36 And if the next class starts at 76, this class ends at 75.

02:43 If the next class starts at 83, then this class has to end at 82.

02:49 And if the next class starts at 90, then this class would have to end at 89.

02:55 And i can do one of two things to figure out where the next one.

02:59 One ends, i can count up seven numbers, or i can add that class with and get the fact that we would start a next class if we needed it at 97, so therefore this one would have to end at 96...

Question

Maximum Wind Speeds The data show the maximum wind speeds in miles per hour recorded for 40 states. Construct a frequency distribution using 7 classes. 59 78 62 72 67 76 92 77 64 83 64 70 67 75 75 78 75 71 72 93 68 69 76 72 85 64 70 77 74 72 53 67 48 76 59 87 53 77 70 63 Source: NOAA

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