Mathematics, 19.10.2019 04:20 smith5845
Exam grades: scores on a statistics final in a large class were normally distributed with a mean of 80 and a standard deviation of 9. use the ti-84 plus calculator to answer the following. round the answers to at least four decimal places. (a) what proportion of the scores were above 93? (b) what proportion of the scores were below 64? (c) what is the probability that a randomly chosen score is between 72 and 90?
Answers: 2
Mathematics, 21.06.2019 12:30
The two-way table shows the number of people whose hobbies are reading or solving puzzles and who either ride a motorcycle or donβt ride a motorcycle. among people whose hobby is reading, what is the relative frequency of not riding a motorcycle? express your answer as a decimal, and round it to the nearest hundredth if necessary. enter your answer in the box. reading solving puzzles ride a motorcycle 7 3 don't ride a motorcycle 5 9
Answers: 1
Mathematics, 21.06.2019 17:00
Evaluate the expression for the given value of the variable 7a - 4a for a =8
Answers: 2
Mathematics, 21.06.2019 18:00
Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2
Answers: 2
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