A frequency table is given below for the grata of Claw II Find the data class bo

Question

A frequency table is given below for the grata of Claw II Find the data class boundaries for all the given data claws Make a histogram for the frequency table, letting these be the dividing points on the z axis, between the bars Is this a normal distribution? Explain In the appropriate column on the given table, write down the relative frequencies (in percents) The data set from Class I is given again below Class Make a stem-leaf diagram for the data. Take the stem to be 10' s and the leaves to 1's What is the probability of choosing at random from this data set, either a grade in the 50's or a grade in the 70's?

Explanation / Answer

a) If the tens are the stems and the leaves are the ones, then

[ANSWER]

b)

There are 14 grades here.

There are 4 in 50's and 3 in 70's. Hence, 7 in total.

Hence,

P(50s or 70s) = 7/14 = 0.5 [ANSWER]

Stem Leaf 0 7 1 2 4 9 3 4 6 4 5 6 6 8 8 6 8 7 3 5 5 8 7

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