The length of timber cuts are normally distributed with a mean of 95 inches and a standard deviation of 0.52 inches. In a random sample of 45 boards, what is the probability that the mean of the sample will be between 94 ...
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Suppose that X1, · · · .Xn are normal with mean µ1; Y1, · · · , Yn are normal with mean µ2, and W1, · · · , Wn are normal with mean µ1 + µ2. Assuming that all 3n random variables are independent with a common variance, f ...
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1. If you deposited $2,000 today in an account that gave you 5% APR compounded interest, how much would you have in 10 years? 2. Suppose you want $5,000 in your bank account when you graduate in four years, how much woul ...
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A normal distribution has a mean equal to 43. What is the standard deviation of this normal distribution if 2.5% of the proportion under the curve lies to the right of x = 46.92? (Round your answer to two decimal place ...
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A survey of a random sample of 1000 smartphone owners found that the mean daily time spent communicating on a smartphone was 131.4 minutes. From previous studies, it is assumed that the population standard deviation is 2 ...
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If we are interested in job satisfaction. Name a variable that correlates with job satisfaction but we do not have causation. Name a variable that you believe may have a casual relationship with job satisfaction. Name a ...
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You decide to research further this seemingly contradictory guidance, hypothesizing that the true population average core body temperature amidst higher ambient temperature and humidity levels while using an electric f ...
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Leprosy, also called Hansen's disease, is a disease produced by infection with a bacterium called Mycobacterium leprae. It has a long incubation period (time between getting infected and developing the disease), usually ...
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Consider the following random sample of data: 8, 6, -6, 0, -9, 4, -1, 7, 6, 84 a) What is the standard deviation of the sample data? Round your response to at least 3 decimal places. b) If the outlier is removed, what is ...
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Height in inches 69 67 69 71 70 72 Weight in lbs 164 161 189 192 184 198 a) Find the equation of the regression line with height as the explanatory variable and use the regression line to find the predicted ...
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