4. Find a 95% confidence interval for the difference of two means when you have independent samples, both of size 64, from two populations, in which the variances are not known to be equal. In this case, n₁=64, s₁²=6.1, the first sample mean is equal to 7.9; n2 =64, s₂²-10.4, the second sample mean is equal to 8.5 Interpret the interval once you find it. Namely, can you conclude one mean is greater than the other mean and if so, which one?

MATLAB: An Introduction with Applications
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4. Find a 95% confidence interval for the difference of two means when you
have independent samples, both of size 64, from two populations, in which
the variances are not known to be equal. In this case, n₁-64, s₁²=6.1, the
first sample mean is equal to 7.9; n2 =64, s2²-10.4, the second sample mean
is equal to 8.5
Interpret the interval once you find it. Namely, can you conclude one mean
is greater than the other mean and if so, which one?
Transcribed Image Text:4. Find a 95% confidence interval for the difference of two means when you have independent samples, both of size 64, from two populations, in which the variances are not known to be equal. In this case, n₁-64, s₁²=6.1, the first sample mean is equal to 7.9; n2 =64, s2²-10.4, the second sample mean is equal to 8.5 Interpret the interval once you find it. Namely, can you conclude one mean is greater than the other mean and if so, which one?
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