1. Suppose a variable has a normal distribution with mean 10 and standard deviation 2. Use...
1. Suppose a variable has a normal distribution with mean 10 and standard deviation 2. Use the Empirical Rule to calculate the approximate PERCENTAGE area. What is the PERCENTAGE of values ABOVE 12?
Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 |Enter PERCENTAGE in above blank with NO % sign. |
2. Suppose a variable has a normal distribution with mean 10 and standard deviation 2. Use the Empirical Rule to calculate the approximate PERCENTAGE area. What is the PERCENTAGE of values BELOW 8?
Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 |Enter PERCENTAGE in above blank with NO % sign. |
3. Suppose a variable has a normal distribution with mean 10 and standard deviation 2. Use the Empirical Rule to calculate the approximate PERCENTAGE area. What is the PERCENTAGE of values is contained within the interval (4, 16)?
Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 |Enter PERCENTAGE in above blank with NO % sign. |
4. Suppose a variable has a normal distribution with mean 10 and standard deviation 2. Use the Empirical Rule to calculate the approximate PERCENTAGE area. What is the PERCENTAGE of values is contained BELOW 6?
Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 |Enter PERCENTAGE in above blank with NO % sign. |
5. Suppose a variable has a normal distribution with mean 10 and standard deviation 2. Use the Empirical Rule to calculate the approximate PERCENTAGE area. What is the PERCENTAGE of values is contained within the interval (6, 8)?
Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38
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1. Suppose a variable has a normal distribution with mean 10 and
standard deviation 2. Use...
Question 2 options: Assume Z is a standard normal random variable with mean 0 and variance...
Question 2 options: Assume Z is a standard normal random variable with mean 0 and variance 1. Find P(Z<1.48)? Area below 1.48? Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 27 is entered as 27.00, -3.5 is entered as -3.50, 0.3750 is entered as 0.38 | | Assume Z is a standard normal random variable with mean 0 and variance 1. Find P(Z>0.67)? Area above 0.67? Note: Enter X.XX AT LEAST ONE...
Assume the time to complete a task has a normal distribution with mean 20 min. and...
Assume the time to complete a task has a normal distribution with mean 20 min. and standard deviation 4 min. Find the proportion of times that are BETWEEN 15 and 25 minutes? Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 7 is entered as 7.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 | | Assume the time to complete a task has a normal distribution with mean 20 min....
Suppose a survey of 36 people determined that the sample mean time spent on the internet...
Suppose a survey of 36 people determined that the sample mean time spent on the internet was 8.2 hours with a sample standard deviation of 9.8 hours. What is the critical value for a 95% confidence interval? Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 7 is entered as 7.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 | | Suppose a survey of 36 people determined that the sample...
Question 13 options: Suppose a survey of 36 people determined that the sample mean time spent...
Question 13 options: Suppose a survey of 36 people determined that the sample mean time spent on the internet was 8.2 hours with a sample standard deviation of 9.8 hours. What is the critical value for a 95% confidence interval? Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 7 is entered as 7.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 | | Suppose a survey of 36 people determined...
Look up the requested values using book tables. You may check with a calculator, but enter...
Look up the requested values using book tables. You may check with a calculator, but enter the table value. Find the t-distribution with 38 degrees of freedom POSITIVE CRITICAL VALUE used for a 99% confidence interval? Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWOAFTER and round up. Thus, 27 is entered as 27.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38
Assume that a normal distribution of data has a mean of 14 and a standard deviation...
Assume that a normal distribution of data has a mean of 14 and a standard deviation of 2. Use the empirical rule to find the percentage of values that lie below 18.
Use empirical rule for a distribution with a mean of 50 and a standard deviation of...
Use empirical rule for a distribution with a mean of 50 and a standard deviation of 5. What is the approximate percentage of the values will fall between 35 and 60?
Assume that a normal distribution of data has a mean of 21 and a standard deviation...
Assume that a normal distribution of data has a mean of 21 and a standard deviation of 6. Use the 68minus−95minus−99.7 rule to find the percentage of values that lie 15. What percentage of values lie belowbelow 15?
Assume that a normal distribution of data has a mean of 20 and a standard deviation...
Assume that a normal distribution of data has a mean of 20 and a standard deviation of 5. Use 68 - 95 - 99.7 rule to find the percentage of values that lie above 15. What is the percentage of values lie above 15?
Assume that a normal distribution of data has a mean of 12 and a standard deviation...
Assume that a normal distribution of data has a mean of 12 and a standard deviation of 3. Use the 68-95-99.7 rule to find the percentage of values that lie below 9.
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