Suppose the number of free throws in a basketball game by one player are normally distributed with a standard deviation 0.97 free throws. a random sample of basketball players from the population produces a sample mean of x¯=4.9 free throws. what value of z should be used to calculate a confidence interval with a 95% confidence level? 20.10 1.282 20.05 1.645 0.025 1.960 20.005 2.576 2.326

1.960

Step-by-step explanation:

The value of z we use to calculate a confidence interval with a () confidence level is a two-tailed test value i.e. represented by :-

Given : The level of confidence:

Then, significance level :

With the help of standard normal distribution table for z , we have

Hence, the value of z should be used to calculate a confidence interval with a 95% confidence level =1.960

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.