<span>The term validity indicates the ability of a test to measure what it is actually designed to measure.
</span>The concept of validity was formulated by Kelly in 1927. A test is valid if it measures what it claims to measure (t<span>he quality or state of being valid).</span>
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he found the approximation of pi
They had been to more lands
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The 1920s is the decade when America's economy grew 42%. Mass production spread new consumer goods into every household. The modern auto and airline industries were born. The U.S. victory in World War I gave the country its first experience of being a global power.
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The answer for your question is A) Farmer