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1. The weight of medium-sized oranges selected at random from a large bin of oranges at the local supermarket is a random variable with mean µ = 12 ounces and standard deviation σ = 1.2 ounces. The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
A. 0.075 pounds.B. 0.005625 pounds.C. 19.2 pounds.
2. A Psychology instructor asked the 100 females in her class to rate their intelligence on a scale of 1 to 10. Some of the ratings were
What proportion of the students rated their intelligence less than 5?A. 6B. 0C. 0.94
Distinct random variable
the maximum point total for the quarter was 200. The point totals for the 10 students are given in the stemplot below. For the density curve displayed below, which of the following is true?
A random variable has the density curve as in the graph below. Find The height of the density curve?
Solve the equations using linear algebra
The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520 hours is approximately.
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
Investigate the cost of a home mortgage and to determine the monthly payment.
A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car
Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be
Solve the mean and standard deviation equations
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