T-test

What is the purpose of a t-test?

• To determine if there is a statistically significant difference between the means of two groups or conditions

• To analyze categorical data

• To perform regression analysis

• To calculate the median of a dataset

What is the null hypothesis for any kind of t-test?

• The data is not normally distributed

• The sample sizes of both groups are equal

• The sample means of both groups are significantly different

• The sample means of both groups are the same

Which is a symbol for a null hypothesis?

• H₁

• H₂

• H_a

• H_o

Which is true?

• P-Value < 0.05 - reject H₀

• P-Value < 0.05 - accept H₀

• P-Value > 0.05 - reject H₀

• None of the above

2.    Which among the following symbols is/are used in representing the alternative hypothesis if the test is two-tailed?

• >

• <

• =

H₀: μ = k

H₁: μ ≠ k

• Left-tailed test

• Two-tailed test

• Right-tailed test

  The average grade of Grade 11 students in Statistics is lower than their average grade in Calculus.

• two-tailed test

• one-tailed test

The enrolment in elementary schools is not the same as the enrolment in the secondary schools.

• one-tailed test

• two-tailed test

The newly found vaccine reduces the risks of viral infections of the patience.

• two-tailed test

• one-tailed test

Male Grade 7 and Grade 12 students differ in height on average

• one-tailed test

• two-tailed test