A point estimate for the sample mean is: (select one) s, Sample standard deviation Oz, Z- score Ox, Sample mean O ME , Margin of error

What is the standard deviation of the following sample data:  40, 49, 23, 47, 40, 17.   Round to 2 decimal places as needed.

Are Older men Shorter than younger men? According to a national mean report the theight arus men IS 69.4 Inches. In a sample Between ages 60 and 300 men 69 The mean theight was I 68.7 Inches. Public Health Officials Want to determine whether the mean theight 14 108 For alder men is less than the mean Height All adult men of population standard deviation is Use a=0.65 level of 3.42 Signifigance, and the pratue

In establishing warranties on HDTVS, the manufacturer wants to set the limits so that few will need repair at the manufacturer's expense. On the other hand, the warranty period must be long enough to make the purchase attractive to the buyer. For a new HDTV, the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months. Where should the warranty limits be set so that only 10% of the HDTVS need repairs at the manufacturer's expenses? (Assuming the time until repairs are needed follows a normal distribution.)