Mathematics, 30.04.2021 19:40 toddbecca9
QUESTION 5 To study how the design of controls and instruments can effect how easily people can use them, a study asked 25 right-handed people to turn a knob (with their right hands) which moved an indicator by screw action. Each person did this on two otherwise identical instruments; one with a right-hand thread (the knob turns clockwise) and one with a left-hand thread (the knob turns counterclockwise). The time required (in seconds) to move the indicator a fixed distance was recorded. The differences in times (recorded as left-hand thread time minus right-hand thread time) were calculated. These differences have a mean of 13.32 seconds and a standard deviation of 22.94 seconds. Researchers want to determine if all right-handed people can more easily use the instruments with a right-hand thread (that is, if the mean time is faster for right-handed people on instruments with a right-hand thread than on instruments with a left-hand thread). What is the value of the test statistic given the implied null and alternative hypotheses
Answers: 1
Mathematics, 21.06.2019 17:30
Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250
Answers: 2
Mathematics, 21.06.2019 18:30
Solve 2x2 + 8 = 0 by graphing the related function. there are two solutions: . there are no real number solutions. there are two solutions: 2 and -2
Answers: 3
Mathematics, 21.06.2019 19:30
00 points ! missy’s rotation maps point k(17, –12) to k’(12, 17). which describes the rotation? 270° counterclockwise rotation 90° counterclockwise rotation 90° clockwise rotation 180° rotation
Answers: 1
QUESTION 5 To study how the design of controls and instruments can effect how easily people can use...
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