ABDULA YUSUF

A student has taken an exam consisting 10 multiple choice questions. Each question has 4 answer choices and has one correct answer. Questions are independent of each other. If the student answer questions randomly, what is the probability that the student...

On average, 40 customers are visiting a store in an hour. Find the probability of more than 40 customers visiting that store in an hour. (15 p)

In a school, the IQ scores of the students have a normal distribution with a mean value of 100, and a standard deviation of 10. What is the probability that the IQ score of a randomly selected student is at least 120? (10 p)

Z has a standard normal distribution. If the value of P(Z<a)=0,8997, what is the value of a?

Using the following data set a. Calculate the mean, mode, median, standard deviation, minimum, maximum and range b. Draw the histogram of the data set. Use 100 as bin width