MathsGee Learning Club - Recent questions tagged #calculate
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Powered by Question2AnswerAn engineer was assigned the task of calculating the average time spent by vehicles waiting at trafficÂ signals.
https://mathsgee.com/40559/engineer-assigned-calculating-vehicles-trafficsignals
An engineer was assigned the task of calculating the average time spent by vehicles waiting at traffic signals. The signal timing (in seconds) would then be modified to reduce the pressure of traffic. The observations of average waiting time during the month of January are:<br />
\[\begin{array}{llllll}58 & 63 & 58 & 12 & 24 & 47 \\ 46 & 29 & 42 & 68 & 33 & \\ 43 & 37 & 39 & 52 & 35 & \\ 44 & 35 & 49 & 36 & 64 & \\ 53 & 28 & 55 & 27 & 53 & \\ 55 & 64 & 37 & 31 & 61 & \end{array}\]<br />
(a) Obtain the quartiles.<br />
(b) Obtain the 80th percentile.<br />
(c) Construct a histogram.Data Science & Statisticshttps://mathsgee.com/40559/engineer-assigned-calculating-vehicles-trafficsignalsFri, 17 Jun 2022 02:50:08 +0000The quality assurance department found in a sample of 50 customers that the mean waiting time is 2.85 minutes. At a 0.05 level of significance, can we conclude that the mean waiting time is less than three minutes?
https://mathsgee.com/39412/quality-assurance-department-customers-significance-conclude
hypothesis tests for a single meanData Science & Statisticshttps://mathsgee.com/39412/quality-assurance-department-customers-significance-concludeSat, 23 Apr 2022 06:08:10 +0000