Mathematics, 12.12.2019 05:31 Olaf2018
Records of 40 used passanger cars and 40 used pickup tricks were randomly selected to investigate whether there was any difference in the mean time in years that they were kept by original owner before being sold. for cars, the mean was 5.3 years with standard deviation 2.2 years. for pickup trucks, the mean was 7.1 years with standard deviation 3.0 years. test the hypothesis that there is a difference in the means against the null hypothesis that there is no difference. use the 1% level of significance.
Answers: 1
Mathematics, 21.06.2019 18:50
Which translation maps the vertex of the graph of the function f(x) = x2 onto the vertex of the function g(x) = x2 – 10x +2?
Answers: 1
Mathematics, 21.06.2019 19:00
In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.
Answers: 1
Mathematics, 22.06.2019 02:10
Which pair of expressions is equivalent? a 7(1–k)and7–k b 7(1–k)and1–7k c 7(1–k)and7–k d 7(1–k)and7–7k
Answers: 1
Records of 40 used passanger cars and 40 used pickup tricks were randomly selected to investigate wh...
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