A. 120 degrees B. 90 degrees C. 30 degrees D. 60 degrees
1 answer:
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Answer:
The tabulated value is less than the calculated value, therefore we accept the null hypothesis and It show that there is a difference in the mean overall distance of brands.
Step-by-step explanation:
The given data sets are
Brand 1: 277 278 287 271 283 271 279 275 263 267
Brand 2: 262 248 260 265 273 281 271 270 263
We need to check that whether there is a difference in the mean overall distance of brands or not.
Null hypothesis:
Alternative hypothesis:
The data is normally distributed, we assume that the variances are equal so we will apply t-test.
The formula for t-statistics is
where,
The value of t is
Degree of freedom is
From t-table the t-value for 0.05 level of significance at 18 degree of freedom is ±2.1009.
Since the tabulated value is less than the calculated value, therefore we accept the null hypothesis and It show that there is a difference in the mean overall distance of brands.