A fruit seller claims that customers who purchases lemons are more likely to purchase limes. To test their claim, they tally up the number of customers who purchase these two fruits in a given day. The observed frequencies are given in the 2 x 2 contingency table below. bought lemons did not buy lemons totals 29.867 35.98 38.043 Complete the table of expected frequencies assuming the null hypothesis that buying lemons and buying limes are independent. bought limes did not buy limes totals 27 56 15 34 42 90 bought lemons (expected) did not buy lemons (expected) 21.776 26.133 32.641 29 19 48 (a) Find the expected frequency of customers who bought lemons and limes. O 8.791 bought limes (expected) did not buy limes (expected) (a) (b) (d) (c) (b) Find the expected frequency of customers who bought lemons but not limes. 4.822 (c) Find the expected frequency of customers who bought limes but not lemons. O 16.218 18.133 24.773 43.393
A fruit seller claims that customers who purchases lemons are more likely to purchase limes. To test their claim, they tally up the number of customers who purchase these two fruits in a given day. The observed frequencies are given in the 2 x 2 contingency table below. bought lemons did not buy lemons totals 29.867 35.98 38.043 Complete the table of expected frequencies assuming the null hypothesis that buying lemons and buying limes are independent. bought limes did not buy limes totals 27 56 15 34 42 90 bought lemons (expected) did not buy lemons (expected) 21.776 26.133 32.641 29 19 48 (a) Find the expected frequency of customers who bought lemons and limes. O 8.791 bought limes (expected) did not buy limes (expected) (a) (b) (d) (c) (b) Find the expected frequency of customers who bought lemons but not limes. 4.822 (c) Find the expected frequency of customers who bought limes but not lemons. O 16.218 18.133 24.773 43.393
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question

Transcribed Image Text:A fruit seller claims that customers who purchases lemons are more likely to purchase limes. To test their claim,
they tally up the number of customers who purchase these two fruits in a given day. The observed frequencies are
given in the 2 x 2 contingency table below.
29.867
35.98
38.043
Complete the table of expected frequencies assuming the null hypothesis that buying lemons and buying limes are
independent.
bought lemons
did not buy lemons
totals
18.133
24.773
43.393
bought limes did not buy limes totals
27
56
15
34
42
90
bought lemons (expected)
did not buy lemons (expected)
29
19
48
(a) Find the expected frequency of customers who bought lemons and limes.
8.791
bought limes (expected) did not buy limes (expected)
(b)
(d)
(b) Find the expected frequency of customers who bought lemons but not limes.
4.822
21.776
26.133
32.641
1
2
(3 3
4
(a)
(c)
(c) Find the expected frequency of customers who bought limes but not lemons.
16.218
3.841
13.419
13.555
16.019
(d) Find the expected frequency of customers who bought neither lemons nor limes.
O 6.14
15.867
20.413
O24.775
(e) Determine the test statistic for a x² test of independence.
0.143
1.891
2.699
7.442
(f) Determine the degrees of freedom used when performing a x² test of independence.
(g) Determine the critical value to use when performing a X² test of independence with significance level
a = 0.05.
(h) Determine whether there is sufficient data to reject the null hypothesis and conclude that there is a dependent
relationship between purchasing lemons and limes at the a= 0.05 significance level.
Yes
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