Question
In R, which function is used to perform a t-test for
comparing the means of two independent samples?Solution
In R, the t.test() function is used to perform a t-test, which compares the means of two independent groups (samples) to determine if there is a statistically significant difference between them. The t.test() function is versatile and can perform both one-sample and two-sample t-tests. It also provides useful outputs, such as p-values and confidence intervals, to evaluate hypothesis tests for means. Why Other Options Are Wrong : B) anova() : ANOVA is used for comparing the means of more than two groups, not two independent samples. C) lm() : The lm() function is used for linear modeling (regression), not hypothesis testing of means. D) cor.test() : This function is used to test the correlation between two variables, not for comparing sample means. E) chisq.test() : The Chi-squared test is used for categorical data and tests the relationship between observed and expected frequencies, not for comparing means.
Statements: P > R = S; T > S > U; Q < U = V
Conclusions:
I. Q < P
II. T > V
III. R ≥ V
In the question, assuming the given statements to be true, find which of the conclusion (s) among given three conclusions is /are definitely true and t...
In the question, assuming the given statements to be true, find which of the conclusion (s) among given four conclusions is/are definitely true and the...
Statements:
A < W ≤ T < Y = O; V < S > K ≥ F > O
Conclusions:
I). W < S
II). Y ≥ K
...Statements: J > O > B < N = T ≥ S < C < I ≤ P
Conclusion
I: P > B
II: N > S
Which of the following symbols should replace the sign (*) and ($) respectively in the expression ' B ≥ T ≥ D = Q = S * V ≤ F $ H ' in order to ma...
Statements: I % C, C & D, D $ K, K # Z
Conclusions: I. I & DÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â II. D # Z
...Statement: F ≥ G > I > E ≤ P, E = S ≥ PÂ
Conclusion: I. F ≥ P         II. G > P
Statements: K > L ≥ M > N, N < O < P = J
Conclusion:
 I. K ≥ O
II. P > L
III. L > J
Statements: U < P = I ≤ V < T ≤ R = W > H = Z > O
Conclusions:
I. U < W
II. R > O
