Roe's friends are members of Frank's Gym. The dot plot shows the number of days that Roe's friends worked out at Frank's Gym last month.
Number of Days Roe's Friends Exercised
21
22
26
27
23 24 25
Number of Days
days.
The most common number of days that Roe's friends worked out last month is
of Roe's friends worked out fewer than than 24 days.
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The investigating team suspected that there were differences in the cost of repairing cars in workshop i and workshop ii. the investigating team suspected that the costs raised by workshop i were greater than workshop ii. for that they tested the repair of 15 cars in each workshop to see the cost of repairs.the decision of the right hypothesis to prove the suspicion above is a. h0 : μ1- μ2­ = 0; ha : μ1- μ2­ ≠ 0 b. h0 : μ1- μ2 ≥ 0; ha : μ1- μ2 < 0 c. h0 : μd ≥ 0; ha : μd < 0 with μd = μ2- μ1 d. h0 : μd = 0; ha : μd ≠ 0 with μd = μ2- μ1 e. h0 : μ1- μ2 = 0; ha : μ1- μ2 ≥ 0