Help me answer each question STEP by STEP (can use excel, if so show me the formulas please!)
X | x^2 | |
1 | 1027 | 1054729 |
2 | 871 | 758641 |
3 | 972 | 944784 |
4 | 836 | 698896 |
5 | 822 | 675684 |
6 | 817 | 667489 |
7 | 959 | 919681 |
8 | 1033 | 1067089 |
9 | 989 | 978121 |
10 | 994 | 988036 |
11 | 921 | 848241 |
12 | 661 | 436921 |
13 | 1014 | 1028196 |
14 | 1027 | 1054729 |
15 | 977 | 954529 |
16 | 880 | 774400 |
Total | 14800 | 13850166 |
Mean | 925 | |
SD | 103.3331 |
Mean =
SD =
Since we are testing whether the avg. spending is less than $935.58 .
This one tailed test since we are testing for left side.
Critical value with =
0.05 = 5%
C.V. =
C.V. = 1.753 ......................using df = n-1 = 15 and p = 5%
Test Stat =
Where the null mean =
935.58
Test Stat = -0.102
Since |test stat| < |C.V.|
We do not reject the null hypothesis. There is not sufficient evidence to conclude that shoppers spent less than an avg. of 935.58 over the Thanksgiving weekend in 2017.
b. the critical value at
= 10%
C.V. = 1.3406
We would still not reject at 10% so that would mean the p -value > 10%.
C.V. = 0.866
We would still not reject at 20% so that would mean the p -value > 20%.
Therefore
One tails: greater than 0.200
p-value =
=
p -value = 0.4599 ....................using t-dist tables and excel 'tdist(|t.s.|df=15,tails=1)
Help me answer each question STEP by STEP (can use excel, if so show me the...
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information should be from the graph
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