(d): Your answer is incorrect. 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 8 days, chosen at random. She records the sales (in dollars) for each store on these days, as shown in the table below. Day 1 2 3 4 5 6 7 8 Store 1 1000 817 351 1 991 547 802 808 996 Store 2 722 775 78 930 407 605 416 944 Difference 278 42 273 19 61 140 197 392 52 (Store 1 - Store 2) Send data to calculator く Based on these data, can the owner conclude, at the 0.05 level of significance, that the mean daily sales of the two stores differ? Answer this question by performing a hypothesis test regarding Ha (which is μ 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.) (a) State the null hypothesis Ho, and the alternative hypothesis H₁. Ho Hd = 0 H₁ = 0 : (b) Determine the type of test statistic to use. μ b X S 00 P □ G ? EQ Save For Later Submit Assignment:
(d): Your answer is incorrect. 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 8 days, chosen at random. She records the sales (in dollars) for each store on these days, as shown in the table below. Day 1 2 3 4 5 6 7 8 Store 1 1000 817 351 1 991 547 802 808 996 Store 2 722 775 78 930 407 605 416 944 Difference 278 42 273 19 61 140 197 392 52 (Store 1 - Store 2) Send data to calculator く Based on these data, can the owner conclude, at the 0.05 level of significance, that the mean daily sales of the two stores differ? Answer this question by performing a hypothesis test regarding Ha (which is μ 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.) (a) State the null hypothesis Ho, and the alternative hypothesis H₁. Ho Hd = 0 H₁ = 0 : (b) Determine the type of test statistic to use. μ b X S 00 P □ G ? EQ Save For Later Submit Assignment:
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:(d): Your answer is incorrect.
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 8 days,
chosen at random. She records the sales (in dollars) for each store on these days, as shown in the table below.
Day
1
2
3
4
5
6
7
8
Store 1
1000
817
351
1
991
547
802
808
996
Store 2
722
775
78 930
407
605
416 944
Difference
278
42
273
19
61
140
197 392
52
(Store 1 - Store 2)
Send data to calculator
く
Based on these data, can the owner conclude, at the 0.05 level of significance, that the mean daily sales of the two stores differ? Answer this question by
performing a hypothesis test regarding Ha (which is μ 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.)
(a) State the null hypothesis Ho, and the alternative hypothesis H₁.
Ho Hd
= 0
H₁ = 0
:
(b) Determine the type of test statistic to use.
μ
b
X
S
00
P
<a
Type of test statistic: t
Degrees of freedom: 7
ローロ
(c) Find the value of the test statistic. (Round to three or more decimal places.)
9.167
(d) Find the two critical values at the 0.05 level of significance. (Round to three or more decimal places.)
2.447 and -2.447
(e) At the 0.05 level, can the owner conclude that the mean daily sales of the two stores differ?
Try again
es No
OO OSO
□≠□
0<0 □>□
G
?
EQ
Save For Later
Submit Assignment:
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