Mathematics, 06.12.2021 23:20 ummitsjustjae
Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and prepreview ads before the movie starts. Many complain that the time devoted to previews is too long. A preliminary sample conducted by The Wall Street Journal showed that the standard deviation of the amount of time devoted to previews was 6 minutes. If we want to estimate the population mean time for previews at movie theaters with a margin of error of 75 seconds, what sample size should be used? Assume 95% confidence.
Answers: 3
Mathematics, 21.06.2019 15:10, sbelgirl2000
Figure abcde is a regular pentagon. segment ae is located at a (2, 1) and e (4, 1). what is the perimeter of abcde? 4 units 6 units 8 units 10 units
Answers: 1
Mathematics, 21.06.2019 20:30, avahrider1
The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle
Answers: 1
Mathematics, 21.06.2019 21:10, koolgurl2003
Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?
Answers: 1
Customers arrive at a movie theater at the advertised movie time only to find that they have to sit...
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