A very large data set (N > 10,000) has a mean value of 335 units and a standard deviation of 10.5 units. Determine the range of values in which 90% of the data set should be found assuming normal probability density (find a in the equation xi = x' ± a).
A very large data set (N > 10,000) has a mean value of 335 units and...
A very large data set (N > 10,000) has a mean value of 32.9 units and a standard deviation of 1.6 units. Determine the range of values in which 50% of the data set should be found assuming normal probability density (find a in the equation xi = x' ± a).
A very large data set (N > 10,000) has a mean value of 876.7 units and a standard deviation of 12.5 units. Determine the range of values in which 70% of the data set should be found assuming normal probability density (find a in the equation xi = x' ± a).
A very large data set (N > 10,000) has a mean value of 1.47 units and a standard deviation of 0.035 units. Determine the range of values in which 95% of the data set should be found assuming normal probability density (find a in the equation xi = x' ± a).
A large sample of data (n = 335) from a Calgary observatory produced a mean daily counting rate for cosmic rays of 3465.46, and a standard deviation of 127.72. Use these sample data and construct a 90% confidence interval for the mean of the daily counting rates.
Determine whether the given value is from a discrete or continuous data set. When a car is randomly selected, it is found to have 3 wipers. A. A discrete data set because there are a finite number of possible values. B. A continuous data set because there are infinitely mamy possible values and those values cannot be counted. O C. A continuous data set because there are infinitely many possible values and those values can be counted. OD. The data...
Question 4 0.5 pts A data set has a mean of 44. In this data set, a raw score X-40 corresponds to the standardized score z-1. What is the standard deviation for this data set? Hint:take advantage of the formula for Z-score Question 5 0.5 pts A data set has a standard deviation of 2.5. In this data set, a raw score X-30 corresponds to the standardized score z = 1.30. What is the mean of this data set? Hint:take...
4. The normal distribution is written as X-N(121, 162). a. State the mean value and the standard deviation. [2 marks] Mean: Standard Deviation: b. Using the normal curve below, shade the area under the range 89 < X < 137. Be sure to label the mean as well as the values for up to 3 standard deviations above and below. [2 marks] c. What percentage of data lies within the shaded region? [1 mark] 5. The entry in the standard...
If the mean of a data set is 92 and standard deviation is 20, what is the typical range of values? If the mean of a data set is 92 and standard deviation is 20, what is the typical range of values?
The sample mean X is to be used to estimate the mean μ ofa normal distribution with standard deviation 4 inches. How large a sample should be taken in order that, with 90% probability, the estimate will be in error by at most one-half inch? n. 1 The sample mean X is to be used to estimate the mean μ ofa normal distribution with standard deviation 4 inches. How large a sample should be taken in order that, with 90%...
a. A data set has n items. The sum of the items is 800 and the mean is 20. Find n b. The standard deviation of this data set is 3. Each value in the set is multiplied by 10. Write down the value of the new mean. c. Find the value of the new variance.