Can't find the answer? Try online tutoring
We have the UK’s best selection of online tutors, when and for how long you need them.
Getting 1-on-1 support is cheaper than you might think.
I'm a bit stuck on this question if anyone can help me?
Last year a new mobile phone company, Sonia, produced and stocked shops with 200,000 of their new phone, Sonia 1. The distribution of the battery times is approx- imately normal. Sonia claims that the mean battery time is 16 hours. If the claim is true, which of the following would be more likely? (a) A random sample of 10 phones having a mean battery time greater than 18 hours or (b) A random sample of 50 phones having a mean battery time greater than 18 hours Justify your answer in no more than five sentences.