A set of final examination grades in an introductory statistics course is normally distributed, with mean of 78 and standard deviation of 9. a. What is the probability that a student scored below 80% on this exam? b. What is the probability that a student scored between 69 and 103?

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

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A: Note :-As per our policy, we can answer only three sub-parts, make a new request for other sub-parts…