Find the average sample 1. sample 2
70. 40
60. 45
50. 43
42.5. 36.7
41. 35
average 52.7. 39.94

total average 46.32

Diameter average
Greater than 19.3
less than 19.3

The average diameter for this population of 60 circles is 19.3. How many of your samples had an average diameter greater than 19.3? How many of your samples had an average diameter less than 19.3? How close is the “average of averages” you calculated to the population average of 19.3?​

An electronics manufacturer wants to know if customers would be interested in a detachable keyboard for their tables and if so, what the most important features would be. the manufacturer partners with an electronics store to include copies of the survey with every purchase at that store for one week. which of the following best explains why this random sample is unlikely to be a good representative sample of tablet owners' preferences for a detachable keyboard? a) one week is likely not enough time to get a large enough sample. b) most people won't bother to send in the survey, which is likely to skew the results c) there is no way to verify whether the responders to the survey actually own a tablet d) the survey is biased because it was conducted through an electronics store, not the general population

Having a hard time understanding this question (see attachment).

Plz ( true - false) all triangles have interior angles whose measure sum to 90.