MATLAB: An Introduction with Applications
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ISBN: 9781119256830
Author: Amos Gilat
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Transcribed Image Text:Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as
specified. (If necessary, consult a list of formulas.)
(a) State the null hypothesis Ho and the alternative hypothesis H₁.
HO
H₁ :0
(b) Determine the type of test statistic to use.
Type of test statistic: Chi-Square
(c) Find the value of the test statistic. (Round to three or more decimal places.)
▼
Yes No
Degrees of freedom:
(d) Find the two critical values at the 0.10 level of significance. (Round to three or more decimal places.)
and
(e) At the 0.10 level, can the owner conclude that the mean daily sales of the two stores differ?
μ
|x
9
0=0
O
X
S
OSO
P
2
010
<Q
020
0*0 0<0 0>0
3
E
Transcribed Image Text:The owner of a chain of mini-markets wants to compare the sales performance of two of her stores, Store 1 and Store 2. Sales can vary considerably depending
on the day of the week and the season of the year, so she decides to eliminate such effects by making sure to record each store's sales on the same 10 days,
chosen at random. She records the sales (in dollars) for each store on these days, as shown in the table below.
34
5 6
789 10
Day
Store 1
Store 2
Difference
(Store 1 - Store 2)
Send data to calculator
Check
1
454
381
73
2
446
808 975
404 835
275
754 341
42 -27 221 -66
399
7
809 246 263 703
336 759
(a) State the null hypothesis H and the alternative hypothesis H₁.
HO
H₁:0
(b) Determine the type of test statistic to use.
Type of test statistic: Chi-Square
63 50
300 214 734
Based on these data, can the owner conclude, at the 0.10 level of significance, that the mean daily sales of the two stores differ? Answer this question by
performing a hypothesis test regarding (which is u with a letter "d" subscript), the population mean daily sales difference between the two stores. Assume
that this population of differences (Store 1 minus Store 2) is normally distributed.
+
Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as
specified. (If necessary, consult a list of formulas.)
-54 49 -31
Degrees of freedom:
н
X
O
S
00
Р
<Q
ola
0=0 OSO 020
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