A college professor noted that the grades of his students in an introductory statistics class were normally distributed with a mean of 76.5 and a standard deviation of 9. If 67.36% of his students received grades of C or above, what is the minimum score of those students receiving a grade of at least a C? ((( 72.45 ))) Bus101-TB, Bus102-TB, uncategorized / drnapesterjj A college professor noted that the grades of his students in an introductory statistics class were normally distributed with a mean of 76.5 and a standard deviation of 9. If 67.36% of his students received grades of C or above, what is the minimum score of those students receiving a grade of at least a C? ((( 72.45 ))) Read More »

The z-value for a standard normal distribution ________. ((( can be either positive or negative ))) Bus102-TB, uncategorized / drnapesterjj The z-value for a standard normal distribution ________. ((( can be either positive or negative ))) Read More »

Consider a continuous random variable x, which is uniformly distributed between 65 and 85. The probability of x taking on a value between 75 to 90 is ________. ((( 0.50 ))) Bus102-TB, uncategorized / drnapesterjj Consider a continuous random variable x, which is uniformly distributed between 65 and 85. The probability of x taking on a value between 75 to 90 is ________. ((( 0.50 ))) Read More »

Consider a standard normal random variable z. What is the value of z if the area to the right of z is 0.2643? ((( 0.63 ))) Bus102-TB, uncategorized / drnapesterjj Consider a standard normal random variable z. What is the value of z if the area to the right of z is 0.2643? ((( 0.63 ))) Read More »

The average starting salary of individuals with a master’s degree in statistics is normally distributed with a mean of $48,000 and a standard deviation of $6,000. What is the probability that a randomly selected individual with a master’s in statistics will get a starting salary of at least $55,000? ((( 0.121 ))) Bus102-TB, uncategorized / drnapesterjj The average starting salary of individuals with a master’s degree in statistics is normally distributed with a mean of $48,000 and a standard deviation of $6,000. What is the probability that a randomly selected individual with a master’s in statistics will get a starting salary of at least $55,000? ((( 0.121 ))) Read More »

If an average of 12 12 customers are served per hour, what is the probability that the next customer will arrive in 6 minutes or less? ((( 0.70 ))) Bus102-TB, uncategorized / drnapesterjj If an average of 12 12 customers are served per hour, what is the probability that the next customer will arrive in 6 minutes or less? ((( 0.70 ))) Read More »

If an average of 12 customers are served per hour, what is the probability that the next customer will arrive in 3 minutes or less? ((( 0.45 ))) Bus102-TB, uncategorized / drnapesterjj If an average of 12 customers are served per hour, what is the probability that the next customer will arrive in 3 minutes or less? ((( 0.45 ))) Read More »

The center of a normal probability distribution is ________. ((( the mean of the distribution ))) Bus102-TB, uncategorized / drnapesterjj The center of a normal probability distribution is ________. ((( the mean of the distribution ))) Read More »

A binomial distribution has 100 trials (n = 100) with a probability of success of 0.25 (π = 0.25). We would like to find the probability of 34 or more successes using the normal distribution to approximate the binomial. Applying the continuity correction factor, what z-score should be used? ((( 1.963 ))) Bus102-TB, uncategorized / drnapesterjj A binomial distribution has 100 trials (n = 100) with a probability of success of 0.25 (π = 0.25). We would like to find the probability of 34 or more successes using the normal distribution to approximate the binomial. Applying the continuity correction factor, what z-score should be used? ((( 1.963 ))) Read More »

A binomial distribution has 50 trials (n = 50) with a probability of success of 0.50 (π = 0.50). We would like to find the probability of 34 or more successes using the normal distribution to approximate the binomial. Applying the continuity correction factor, what z-score should be used? ((( 2.404 ))) Bus102-TB, uncategorized / drnapesterjj A binomial distribution has 50 trials (n = 50) with a probability of success of 0.50 (π = 0.50). We would like to find the probability of 34 or more successes using the normal distribution to approximate the binomial. Applying the continuity correction factor, what z-score should be used? ((( 2.404 ))) Read More »