Cats live for 14 years on average, with a standard deviation of 2 years. A simple random sample of 78 recently deceased cats is selected, and the sample mean age at death of these cats is computed. We know the distribution of the sample mean is approximately normal here because of
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Cats live for 14 years, on average, with a standard deviation of 2 years, and cat lifespan is bimodal with a large peak at the beginning of life and a second peak near 16 years. A simple random sample of 78 recently deceased cats is selected, and the sample mean age at death of these cats is computed. What is the shape of the sampling distribution of sample means? Skewed right Bimodal Skewed left Approximately normal
David N.
On average, indoor cats live to 14 years old with a standard deviation of 2.4 years. Suppose that the distribution is normal. Let X = the age at death of a randomly selected indoor cat. Round answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that an indoor cat dies when it is between 13.8 and 16.1 years old. c. The middle 20% of indoor cats' age of death lies between what two numbers? Low: years High: years
Sri K.
On average, indoor cats live to 13 years old with a standard deviation of 2.2 years. Suppose that the distribution is normal. Let X = the age at death of a randomly selected indoor cat. Round answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that an indoor cat dies when it is between 14.4 and 16.9 years old. c. The middle 50% of indoor cats' age of death lies between what two numbers? Low: years High: years
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