Suppose the mean height in inches of all 9th-grade students at one high school is estimated. The population standard deviation is 6 inches. The heights of 7 randomly selected students are 73 ,70 ,61 ,75 ,60 , 60 and 67 . =

Margin of error at 90% confidence level =

90% confidence interval = [

What principle of light’s behavior can be used to make a far away object appear closer and also make a small object appear larger? a. reception b. absorption c. refraction d. transmission

Ateacher attaches a ball to a meter long string and whirls it around in a horizontal circle at constant speed. the teacher explains that the string is what makes the ball go in a circle. why is the string necessary? a) the string is needed to apply a torque to the ball. b) the string is needed to push on the ball to get it up to speed. c) circle motion requires an inertia which is provided by the string. d) circle motion requires a force to give it a centripetal acceleratio

Last month sarah ryan and taylor received a total of 882 emails if sarah receive 25% more emails than the sum of the numbers of emails received by ryan and taylor how many emails did sarah receive?