Harper MTH165 Homework Section 2.2 Latest 2020 MAY

MTH165 ELEMENTARY STATISTICS

Homework Section 2.2

In this section you learned how to make the most common graph for when data are collected for a single quantitative variable.

Name the graph you learned about in this section:   ____ __________________________

What is the formula used to compute the class width?

(Highest vale-lowest value)/(number of classes)

What are the four common shapes of histograms that were discussed in this section?

Fill in the following as you work through your given problems in MyOpenMath

Fill in the following in the context of this problem:

Individual object: _________________ ___ __________________________

Variable info collected from each object: _____ _ ________________________________

Since data were collected for ___ ___ _ ______ variable(s), the correct graph to make is a ___ ______.

Show your computation of the class width:

(maxX - minX)/(number of classes)

(286-114)/5 = 34.4 = 35 ( in nearest whole number

Complete the frequency/relative frequency table:

Classes Frequency          Relative frequency                         

113.5-148.5         8              0.267

148.5-183.5         11           0.367

183.5-218.5         8              0.267

218.5-253.5         1              0.033

253.5-288.5         2              0.067

Use StatCrunch to make the histogram.   Print and attach graph.

Fill in the following in the context of this problem:

Individual object: _____________ ___________________________________

Variable info collected from each object: ________ ______________________________

Since data were collected for ___ _ _________ variable(s), the correct graph to make is a __histogram_______.

On this one the class width was given to be the following:  _________

Complete the frequency/relative frequency table:                         

Classes                 Frequency          Relative frequency                                                                         

49.5-59.5              1                              0.04       

59.5-69.5              2                              0.08       

69.5-79.5              4                              0.16       

79.5-89.5              8                              0.32       

89.5-99.5              10                           0.4         

Use StatCrunch to make the histogram.   Print and attach graph.

What shape is the histogram? ______ _________________________

Fill in the following in the context of this problem:

Individual object: ________________________________________________

Variable info collected from each object: ______________________________________

Since data were collected for ________ variable(s), the correct graph to make is a ____ _____.

On this one the class width was given to be the following:  ________

Complete the frequency/relative frequency table:

Frequency          Relative frequency                         

49.5-59.5              10           0.4

59.5-69.5              8              0.32

69.5-79.5              4              0.16

79.5-89.5              2              0.08

89.5-99.5              1              0.04

Use StatCrunch to make the histogram.   Print and attach graph.

What shape is the histogram? ______________________