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A group of freshmen and sophomore students was selected and each was asked whether they were a member of a student club. The following table was constructed: Student Club No Student Club Freshman 4 15 Sophomore 9 7 Find the probability that a randomly sel...

The probability of winning something on a single play at a slot machine is 0.29. After 6 plays on the slot machine, What is the probability of winning at least once? Write only a number as your answer. Round your answer to four decimal places (for example...

A number of people were asked how many days they would wait to seek medical treatment if they were suffering pain that interfered with their ability to work. The results are presented in the following table. Number of days: 0 , 1 , 2 , 3 , 4 , 5 Frequency...

An investor is considering an investment in a start-up company. she estimates that she has probability 0.25 of a $ 39,739 loss, probability 0.20 of a $ 19,759 profit, probability 0.15 of a $ 49,068 profit, and probability 0.40 of breaking even (a profit o...

The probability that a student uses Smarthinking online tutoring on a regular basis is 0.41. In a group of 21 students, what is the probability that exactly 5 of them use Smarthinking Online Tutoring on a regular basis? Write only a number as your answer....

The Probability that a randomly selected commuter listens to audiobooks during their commute is 0.49. Suppose that a sample of 10 commuters is selected, what is the probability that at most 3 of them listen to audiobooks? Write only a number as your answe...

In a certain class 27% of the students are left-handed. suppose that a random sample of 53 students is selected. Find the mean number of left-handed students in the class. Round your answer to the nearest integer.

Find z 0.44 . Write only a number as your answer. Round to two decimal places (for example: 0.81).

The z-scores that bound the middle 35 % under the standard normal curve are z = -a and z = a. Find the value of a. Write only a positive number as your answer. Round to two decimal places (for example: 0.81).

Find the z-score for which the area to its right is 0.65 . Write only a number as your answer. Round to two decimal places (for example: 0.81).

It has been reported that 48% of teenagers play video games on their phones. A random sample of 60 teenages is drawn. Find the probability that the proportion of teenagers in the sample who play videos games on their phone is less than 0.499 . Write only...

At a certain university, 50% of all entering freshmen planned to major in a STEM (science, technology, engineering, mathematics) discipline. A sample of 36 freshmen is selected. What is the probability that the proportion of freshmen in the sample is betw...

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convex and divergent