Suppose we observe two independent random samples X₁, ..., Xn, with each Xi Y₁ ~ N(μ₂, 0²). We will assume that µ₁, µ₂ and o² are unknown. We are given x = 10.1, y = 7.1, s² = 5.5 and s = 6.4, with n₁ = 13 and n₂ = 19. We would like to test the hypothesis Ho: M₁ = μ₂ versus H₁ μ₁ # M₂. What test statistic should you use? You may assume the samples come from populations with equal variances. Select one: Ⓒa. T= O b. T= OC. Z = ā Sal√12 t12, where d is the mean and S2 is the sample variance of paired differences d¡ = x¡ — Y¡, i = 1, ..., 13. tn +m₂-2, where S² is the pooled estimate of variance. X-Y Sp√/1/m₁+1/m₂ X-Y 0²√√1/m₁+1/m₂ 2 N(μ₁,0²) and Y₁, ..., Yn with each ~ N(0, 1), where o² = 6.04.

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b) What is the observed value of the test statistic for the appropriate hypothesis test of ?: ?=?2. versus ?: ?1 ≠ ?2


n₁
Suppose we observe two independent random samples X₁, ..., Xn with each X₁
Y₁ N(μ₂,0²). We will assume that µ₁, µ₂ and ² are unknown.
We are given x =
10.1, y = 7.1, s² = 5.5 and s
We would like to test the hypothesis Ho: M₁ = µ₂ versus H₁ μ₁ ‡ M₂.
What test statistic should you use? You may assume the samples come from populations with equal variances.
Select one:
a. T= =
b. T
C.
=
Z =
d
Sal√12
X-Y
Sp√/1/n₁+1/m₂
N(μ₁,0²) and Y₁, ..., Yn with each
=
X-Y
0²√1/m₁+1/m₂
t12, where d is the mean and S2 is the sample variance of paired differences d; = = x¡ — Y¡, i = 1, ...,
..., 13.
tn +m₂-2, where S is the pooled estimate of variance.
N(0, 1), where o² = 6.04.
6.4, with n₁ = 13 and n₂ = 19.
Transcribed Image Text:n₁ Suppose we observe two independent random samples X₁, ..., Xn with each X₁ Y₁ N(μ₂,0²). We will assume that µ₁, µ₂ and ² are unknown. We are given x = 10.1, y = 7.1, s² = 5.5 and s We would like to test the hypothesis Ho: M₁ = µ₂ versus H₁ μ₁ ‡ M₂. What test statistic should you use? You may assume the samples come from populations with equal variances. Select one: a. T= = b. T C. = Z = d Sal√12 X-Y Sp√/1/n₁+1/m₂ N(μ₁,0²) and Y₁, ..., Yn with each = X-Y 0²√1/m₁+1/m₂ t12, where d is the mean and S2 is the sample variance of paired differences d; = = x¡ — Y¡, i = 1, ..., ..., 13. tn +m₂-2, where S is the pooled estimate of variance. N(0, 1), where o² = 6.04. 6.4, with n₁ = 13 and n₂ = 19.
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