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What kind of t-test is this study?

Researchers wish to investigate whether anxiety in children has increased over time. In 1950, the average score on the Child
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Answer #1

One sample t test should be used here

The null hypothesis (H0) and (two-tailed) alternative hypothesis (H1) of the one sample T test can be expressed as:

H0: µ = x  ("the sample mean is equal to the [proposed] population mean")
H1: µ ≠ x  ("the sample mean is not equal to the [proposed] population mean")

where µ is a constant proposed for the population mean and x is the sample mean.

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