Following is the data of sales figure of a company for 100 days: Compute the average deviation. Sales ($ '000) 40-50 50-60 60-70 70-80 80-90 90-100 No. of days 10 15 25 30 12 8
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- The mean age of a random sample 25 people who were playing the slot machines is 48.7 years, and the population standard deviation is 6.8 years. The mean age of a random sample of 35 people who were playing roulette is 55.3 years with a population standard deviation of 3.2 years. Can it be concluded at a=0.05 that the mean age of those playing the slot machines is less than those playing roulette?The mean age of a random sample of 25 people who were playing the slot machines is 48.7 years, and the standard deviation is 6.8 years. The mean age of a random sample of 35 people who were playing roulette is 55.3 years with a standard deviation of of 3.2 years. Can it be concluded at a=0.05 that the mean age of those playing the slot machines is less than those playing roulette?The mean age of a sample of 25 people who were playing the slot machines is 48.7 years, and the standard deviation is 6.8 years. The mean age of a sample of 35 people who were playing roulette is 55.3 with a standard deviation of 3.2 years. Can it be concluded at a _ 0.05 that the mean age of those playing the slot machines is less than those playing roulette?
- The average age of senators in the 108th Congress was 58 years. If the standard deviation was 11 years, find the z scores corresponding to the oldest and youngest senators of age 87 and 36 . Round z scores to two decimal places The z-score corresponding to the oldest senator of age 87 is ?In a certain school district, the ages of all new teachers hired during the last 5 years are normally distributed. Within this curve, 95.4% of the ages, centered about the mean, are between 24.6 and 37.4 years. Find the mean age and the standard deviation of the data. [Show all work.]Suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 55 and the standard deviation is 5. There are 35 students in the class. What score would be necessary to obtain a grade A?
- Suppose that the blood pressure of the human inhabitants of a certain Pacific island is distributed with mean, μ = 90 mmHg and standard deviation , σ = 8 mmHg. According to Chebyshev's Theorem, at least what percentage of the islander's have blood pressure in the range from 74 mmHg to 106 mmHg ?Suppose in 2000, the science scores for female students had a mean of 146 with a standard deviation of 35. Assume that these scores are normally distributed with the given mean and standard deviation. _________________ of the female students scored between 76 and 216Suppose at the end of the year everyone at Bob’s restaurant gets a 5 percent raise per hour to their existing wages. How does this raise affect the standard deviation of their wages? it is multiplied by 1.05 it is the same as before it is multiplied by .05