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Statistics

Statistics

Statistics What is the formula for the mean of grouped data using the direct method?a) x=∑f∑xx = frac{sum f}{sum x} b) x=∑fx∑fx = frac{sum fx}{sum f} c) x=∑f2∑fxx = frac{sum f^2}{sum fx} d) x=∑x∑fx = frac{sum x}{sum f} x=∑f∑xAnswer: b The sum of the frequencies in a frequency distribution is called:a) Modeb) Medianc) Cumulative frequencyd)

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Circles

Circles

Circles       How many tangents can a circle have?a) 1b) 2c) Infinited) NoneAnswer: c) Infinite What is the point where a tangent touches a circle called?a) Radiusb) Chordc) Diameterd) Point of contactAnswer: d) Point of contact What is the line called that intersects a circle at exactly one point?a) Secantb) Tangentc) Diameterd) RadiusAnswer:

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