Vince makes 75% of his free throw attempts. he wants to create a tool that will simulate his free throw shooting and allow him to predict the probability that he will make 6 of his next 7 free throw attempts.
which spinner simulation uses an appropriate device and has the correct number of trials?
a spinner divided into 2 congruent sectors, spun 6 times
a spinner divided into 2 congruent sectors, spun 7 times
a spinner divided into 4 congruent sectors, spun 6 times
a spinner divided into 4 congruent sectors, spun 7 times

1) a researcher is studying a population of bats in which 16% of the population has a certain trait. the researcher wants sampling distribution with a standard deviation that is less than 2%. which sample sizes could the researcher use? select all that apply : a)n=200 b) n=300 c) n=400 d) n=500 2) from a normal distribution population, a simple random sample of size 38 is taken. the mean of the sample is 82 and the standard deviation of the sample is 4. what is the 90% confidence interval for the population mean? round to the nearest tenth ( [1], 83.1)