What percentage of such patients have a stress score lower than 6.0? b. What is the probability that a randomly selected root canal patient sitting in the waiting room has a stress score between 7.0 and 8.0? а. The psychologist suggests that any patient with a stress score of 9.0 or higher should be given a sedative prior to treatment. What percentage of patients waiting for root canal treatments would need a sedative if this suggestion is accepted? с.

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3. A psychologist has devised a stress test for dental patients sitting in the waiting rooms.
According to this test, the stress scores lon a scale of I to 10) for patients waiting for root
canal treatments are found to be approximately normally distributed with a mean of 7.59 and a
standard deviation of 0.73.
What percentage of such patients have a stress score lower than 6.0?
b. What is the probability that a randomly selected root canal patient sitting in the waiting
room has a stress score between 7.0 and 8.0?
c. The psychologist suggests that any patient with a stress score of 9.0 or higher should be
given a sedative prior to treatment. What percentage of patients waiting for root canal
treatments would need a sedative if this suggestion is accepted?
а.
Transcribed Image Text:3. A psychologist has devised a stress test for dental patients sitting in the waiting rooms. According to this test, the stress scores lon a scale of I to 10) for patients waiting for root canal treatments are found to be approximately normally distributed with a mean of 7.59 and a standard deviation of 0.73. What percentage of such patients have a stress score lower than 6.0? b. What is the probability that a randomly selected root canal patient sitting in the waiting room has a stress score between 7.0 and 8.0? c. The psychologist suggests that any patient with a stress score of 9.0 or higher should be given a sedative prior to treatment. What percentage of patients waiting for root canal treatments would need a sedative if this suggestion is accepted? а.
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