Question 2 Suppose you are working with a data set that is normally distributed, with a...
Use the following info for 17-19. A normally distributed data set has a mean of 100 and a standard deviation of 10. 17. What percentage of values are greater than 90? 18. What percentage of values are less than 90? 19. What z score corresponds to a value of 110? 20. What z score corresponds to a value of 90
A random experiment involves drawing a sample of 12 data values from a normally distributed population. 20 29 39 42 43 45 45 46 47 54 55 59 Calculate the z-score of the median of the data set. z = (Round to 3 decimal places) Hint: You will need the mean and standard deviation first. Round your mean and standard deviation calculations to 5 decimal places.
Suppose that X is normally distributed with mean 100 and standard deviation 25. A. What proportion of X is greater than 142? (Provide answer rounded to four decimal places.) Proportion = B. What value of X does only the top 15% exceed?
Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 248 feet and a standard deviation of 46 feet. We randomly sample 49 fly balls. Part(a) If X = average distance in feet for 49 fly balls, then give the distribution of X Round your standard deviation to two decimal places Part (b) What is the probability that the 49 balls traveled an average of less than 238 feet? (Round...
Suppose your manager indicates that for a normally distributed data set you are analyzing, your company wants data points between z=−1.4 and z=1.4 standard deviations of the mean (or within 1.4 standard deviations of the mean). What percent of the data points will fall in that range? Answer: percent (Enter a number between 0 and 100, not 0 and 1 and round to 2 decimal places)
Suppose you have a normally distributed set of data pertaining to a standardized test. The mean score is 1000 and the standard deviation is 200. What is the z-score of 1600 point score?
on Help A sample of 51 values is taken from population that is normally distributed with a mean of 341 and a standard deviation of 52. Find the probability that the sample standard deviation is less than 46. PCS < 46) = 0 (Round to four decimal places as needed.)
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 the probability that their mean weight will be between 692 grams and 701 grams (Give answer to 4 decimal places.) 6. A particular fruit's weights are normally distributed, with a mean of 286 grams and a standard deviation of 18 grams. If you pick 25 fruit at random, what is...
1. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading less than 1.089°C. P(Z<1.089)=P(Z<1.089)= (Round answer to four decimal places.) 2. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is...
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...