Arecent report stated that 10% (0.10) of all men in the u. s. are left-handed. a random sample of 250 men is selected to further study this question, a. what is the shape, mean (expected value) and standard deviation of the sampling distribution of the sample proportion for samples of size 250? b. what is the probability that the sample proportion for a sample of size 250 is greater than 12% (0.12)? c. what is the probability that the sample proportion for a sample of size 250 is between 13% (0.13) and 15% (0.15)?

the infinity sign

step-by-step explanation:

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation: