f′(x)=4x3−4x=4x(x−1)(x+1). Sign chart: f′>0 on (−1,0)∪(1,∞) and f′<0 on (−∞,−1)∪(0,1). Hence f is increasing on (−1,0)∪(1,∞).
The following data is available for two independent sample: | | SAMPLE-1 | SAMPLE-2 | |---|---|---| | sample size | 8 | 10 | | sample mean | 191 |…
CUET UG 2023 — Mathematics Applied-Mathematics
2023mcqhard
The following data is available for two independent sample:
| SAMPLE-1 | SAMPLE-2 | |
|---|---|---|
| sample size | 8 | 10 |
| sample mean | 191 | 199 |
| sample standard deviation | 10 | 12 |
Then the value of t-statistic is :
Official previous-year question
Held on 23 May 2023 · Verified 13 Jul 2026.
Options
- A
+1.54
- B
-1.54
- C
-1.74
- D
-1.10
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