A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 2.2 years, and standard
deviation of 0.7 years.
If you randomly purchase 23 items, what is the probability that
their mean life will be longer than 2 years? (Give answer to 4
decimal places.)
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2 years, and standard deviation of 0.5 years. If you randomly purchase one item, what is the probability it will last longer than 1 years? Is there a formula to input this into my calc?
4. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.4 years, and standard deviation of 3.2 years. If you randomly purchase 21 items, what is the probability that their mean life will be longer than 15 years? (Give answer to 4 decimal places.) 5. A particular fruit's weights are normally distributed, with a mean of 704 grams and a standard deviation of 12 grams. If you pick 12 fruit at random, what is...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.8 years, and standard deviation of 2.5 years. If you randomly purchase 15 items, what is the probability that their mean life will be longer than 7 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.9 years, and standard deviation of 2.4 years. If you randomly purchase 9 items, what is the probability that their mean life will be longer than 12 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13 years, and standard deviation of 2.5 years. If you randomly purchase one item, what is the probability it will last longer than 20 years? A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5.8 years, and standard deviation of 1.9 years. The 5% of items with the shortest lifespan will last less than how many years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13 years, and standard deviation of 4.1 years. If you randomly purchase one item, what is the probability it will last longer than 23 years?
A manufacturer knows that their items have a normally distributed length, with a mean of 18 inches, and standard deviation of 5.7 inches. If one item is chosen at random, what is the probability that it is less than 13 inches long? A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.7 years, and standard deviation of 0.7 years. If you randomly purchase one item, what is the probability it will last longer than...
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.3 years, and standard deviation of 0.6 years. If you randomly purchase one item, what is the probability it will last longer than 4 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.9 years, and standard deviation of 0.8 years. If you randomly purchase one item, what is the probability it will last longer than 4 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.5 years, and standard deviation of 1.8 years. If you randomly purchase one item, what is the probability it will last longer than 12 years?