Question

Statistics students in Oxnard College sampled 9 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The data are shown below:

Number of Pages (xx) | Cost(yy) |
---|---|

359 | 31.95 |

865 | 59.25 |

554 | 38.7 |

966 | 51.3 |

782 | 61.1 |

733 | 58.65 |

209 | 19.45 |

697 | 49.85 |

582 | 46.1 |

A student calculates a linear model using technology (Statistics
Calculator or Computer)

ˆyy^ = xx + . (Please show your answers to two decimal
places)

Use the model to estimate the cost when number of pages is
874.

Cost = $ (Use the linear model with yor rounded coefficients and
then round your answer to 2 decimal places.)

Answer #1

Find X⋅Y and X^{2} as it was done in the table
below.

X | Y | X⋅Y | X⋅X |

359 | 31.95 | 11470.05 | 128881 |

865 | 59.25 | 51251.25 | 748225 |

554 | 38.7 | 21439.8 | 306916 |

966 | 51.3 | 49555.8 | 933156 |

782 | 61.1 | 47780.2 | 611524 |

733 | 58.65 | 42990.45 | 537289 |

209 | 19.45 | 4065.05 | 43681 |

697 | 49.85 | 34745.45 | 485809 |

582 | 46.1 | 26830.2 | 338724 |

**Answer : Y hat = 0.05 x + 12.90**

Given x = 874 then

y = 0.05 ( 874 ) + 12.90

=56.6

**Answer : Cost (y ) = $ 56.60**

Statistics students in Oxnard College sampled 9 textbooks in the
Condor bookstore and recorded the number of pages in each textbook
and its cost. The bivariate data are shown below:
Number of Pages (xx)
Cost(yy)
863
133.82
226
53.64
584
95.76
627
105.78
449
86.86
630
100.2
512
97.68
729
117.06
889
148.46
A student calculates a linear model
yy = xx + . (Please show your answers to two decimal
places)
Use the model to estimate the cost when number...

Statistics students in Oxnard College sampled 9 textbooks in the
Condor bookstore and recorded the number of pages in each textbook
and its cost. The bivariate data are shown below:
Number of Pages (xx)
Cost(yy)
795
100.5
294
48.4
562
61.2
208
41.8
513
67.3
518
67.8
914
110.4
729
96.9
777
94.7
A student calculates a linear model
y = _________x+______________ . (Please show your answers to two
decimal places)
Use the model to estimate the cost when number...

Statistics students in Oxnard College sampled 11 textbooks in
the Condor bookstore and recorded the number of pages in each
textbook and its cost. The bivariate data are shown
below:
Number of Pages (xx)
Cost(yy)
315
54.35
810
98.9
834
98.06
628
76.52
613
64.17
978
110.02
505
67.45
567
74.03
543
75.87
851
91.59
408
49.72
A student calculates a linear model
yy = xx + . (Please show your answers to two decimal
places)
Use the model to estimate...

Statistics students in Oxnard College sampled 9 textbooks in the
Condor bookstore and recorded the number of pages in each textbook
and its cost. The data are shown below:
)
465
51.2
711
80.88
536
67.88
347
46.76
720
67.6
248
35.84
909
80.72
735
81.8
579
70.32
A student calculates a linear model using technology (Statistics
Calculator or Computer)
ˆy = x + . (Please show your answers to two decimal places)
Use the model to estimate the cost...

Statistics students in Oxnard College sampled 9 textbooks in the
Condor bookstore and recorded the number of pages in each textbook
and its cost. The bivariate data are shown below: Number of Pages (
x ) Cost( y ) 562 67.58 482 68.38 535 70.15 934 107.06 271 31.39
543 66.87 219 35.71 786 93.74 882 103.38 A student calculates a
linear model y = x + . (Please show your answers to two decimal
places) Use the model to...

Statistics students in Oxnard College sampled 9 textbooks in the
Condor bookstore, and recorded number of pages in each textbook and
its cost. The bivariate data is shown below,
)
580
72.8
808
99.88
805
98.55
976
118.36
961
107.71
540
57.4
861
96.71
528
68.08
294
27.34
A student calculates a linear model
y = x + . (Please show your answers to two decimal places)
Use the model above to estimate the cost when
number of pages is...

Statistics students in Oxnard College sampled 10 textbooks in
the Condor bookstore, and recorded number of pages in each textbook
and its cost. The bivariate data is shown below,
)
531
48.48
974
88.92
474
47.92
679
68.32
856
87.48
581
59.48
533
57.64
535
62.8
260
32.8
425
53
A student calculates a linear model
y = x + .
(Please show your answers to two decimal places)
Use the model above to estimate the cost when
number of...

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