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AC. Suppose the weight of a 1-year-old perch is normally distributed with mean 8.4 ounces and...
Assignment #7: AB. The height at the shoulder) of adult African bush elephants has a normal distribution with mean 3.3 meters and standard deviation 0.2 meters. (i) What proportion of the elephants have heights greater than 4 meters? (ii) Find the 67th percentile of the elephant heights. AC. Suppose the weight of a 1-year-old perch is normally distributed with mean 8.4 ounces and standard deviation 2 ounces. (i) What proportion of 1-year-old perch weigh less than 9 ounces? (ii) Find...
Cerebral blood flow (CBF) in the brains of healthy people is normally distributed with a mean of 72. A random sample of 25 stroke patients resulted in an average CBF of x = 69.9 with a standard deviation of s = 12. Test the hypothesis that the average CBF for stroke patients is different from that of healthy people using α = 0.05. State the test statistic. (Round your answer to three decimal places.) t= State the rejection region. (If...
Suppose that the weight of sweet cherries is normally distributed with mean μ=6 ounces and standard deviation σ=1.4 ounces. What proportion of sweet cherries weigh more than 4.7 ounces? Round your answer to four decimal places.
Suppose that the weight of Florida navel oranges is normally distributed with mean µ = 8 ounces, and standard deviation σ = 1.5 ounces. (a) (1 point) State the model in notation form. (b) (2 points) What proportion of oranges weigh more than 11.5 ounces? (c) (2 points) What proportion of oranges weigh less than 8.7 ounces? (d) (2 points) What proportion of oranges weigh between 6.2 and 7 ounces? Page 3 (e) (5 points) What are the median, mode,...
The weights of bags of baby carrots are normally distributed, with a mean of 28 ounces and a standard deviation of 0.33 ounce. Bags in the upper 4.5% are too heavy and must be repackaged. What is the most a bag of baby carrots can weigh and not need to be repackaged?
The weights of bags of baby carrots are normally distributed, with a mean of 34 ounces and a standard deviation of 0.37 ounce. Bags in the upper 4.5% are too heavy and must be repackaged. What is the most a bag of baby carrots can weigh and not need to be repackaged?
The weights of ice cream cartons are normally distributed with a mean weight of 20 ounces and a standard deviation of 0.3 ounces. You randomly select 25 cartons. What is the probability that their mean weight is greater than 20.06 ounces? 0.579 0.421 0.841 0.159
The weights of ice cream cartons are normally distributed with a mean weight of 20 ounces and a standard deviation of 0.5 ounces. You randomly select 25 cartons. What is the probability that their mean weight is greater than 20.06 ounces? 1. 0.274 2. 0.452 3. 0.548 4. 0.726
The weights of ice cream cartons are normally distributed with a mean weight of 11 ounces and a standard deviation of 0.5 ounce. (a) What is the probability that a randomly selected carton has a weight greater than 11.17 ounces? (b) A sample of 16 cartons is randomly selected. What is the probability that their mean weight is greater than 11.17 ounces?
The weights of ice cream cartons are normally distributed with a mean weight of 7 ounces and a standard deviation of 0.3 ounce. (a) What is the probability that a randomly selected carton has a weight greater than 7.12 ounces? (b) A sample of 25 cartons is randomly selected. What is the probability that their mean weight is greater than 7.12 ounces? (a) The probability is (Round to four decimal places as needed.)