Confidence Interval/Normality Assumption - Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. There were 86. a) Construct a 90% confidence interval for the proportion of all kernels that would not pop. b) Check the normality assump...

Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. - I'm having trouble with the following statistics: 9.54 Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The ...

In Dallas, some fire trucks were painted yellow (instead of red)to heighten their visibility. - See the attached file for the 5 problems. 1. In Dallas, some fire trucks were painted yellow (instead of red)to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had 4 acci...

In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. - Please see attached...thank you! 10.30 In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had 4 accide...

Parametric vs. Nonparametric Data Identification - A manufacturer produces a batch of memory chips (RAM) and measures the mean-time-between failures (MTBF). the manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF. did the change to the process improve the MTBF? How do I determine if this is parametric or nonparametric?