Mathematics, 30.11.2019 05:50 AllanCasey12

# Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. a study was then done to see if the mean time has increased in the new century. a random sample of 27 first-time convicted burglars in a recent year was picked. the mean length of time in jail from the survey was four years with a standard deviation of 1.9 years. suppose that it is somehow known that the population standard deviation is 1.4. conduct a hypothesis test to determine if the mean length of jail time has increased. assume the distribution of the jail times is approximately normal.

since both Æ¡ and sx are given, which should be used?

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o sx

in one to two complete sentences, explain why?

Answers: 3

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Which sum or difference identity would you use to verify that cos (180Â° - âˆ…) = -cos âˆ…? a. sin (Î± -Î²) = sin Î± cos Î² â€“ cos Î± sin Î² b. cos (Î± -Î²) = cos Î± cos Î² â€“ sin Î± sin Î² c. cos (Î± -Î²) = cos Î± cos Î² + sin Î± sin Î² d. sin (Î± + Î²) = sin Î± cos Î² + cos Î± sin Î²

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What is the radical expression that is equivalent to the expression 27 1 over 5?

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Mathematics, 02.02.2019 22:18

In Î´abc shown below, âˆ bac is congruent to âˆ bca: triangle abc, where angles a and c are congruent given: base âˆ bac and âˆ acb are congruent. prove: Î´abc is an isosceles triangle. when completed (fill in the blanks), the following paragraph proves that line segment ab is congruent to line segment bc making Î´abc an isosceles triangle. (4 points) construct a perpendicular bisector from point b to line segment ac . label the point of intersection between this perpendicular bisector and line segment ac as point d: mâˆ bda and mâˆ bdc is 90Â° by the definition of a perpendicular bisector. âˆ bda is congruent to âˆ bdc by the definition of congruent angles. line segment ad is congruent to line segment dc by by the definition of a perpendicular bisector. Î´bad is congruent to Î´bcd by the line segment ab is congruent to line segment bc because consequently, Î´abc is isosceles by definition of an isosceles triangle. 1. corresponding parts of congruent triangles are congruent (cpctc) 2. the definition of a perpendicular bisector 1. the definition of a perpendicular bisector 2. the definition of congruent angles 1. the definition of congruent angles 2. the definition of a perpendicular bisector 1. angle-side-angle (asa) postulate 2. corresponding parts of congruent triangles are congruent (cpctc)

Answers: 1

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