1. What does a Z-score of -1.3 mean

A a z-score of1.3 means that the datavalue is 1.3standard deviations belowthe mean.

B az-score of1.3 means that the datavalue is 1.3standard deviations abovethe mean.

C a z-score of1.3 means that the datavalue is 0.7 standard deviation abovethe mean.

D az-score of1.3 means that the datavalue is0.7 standard deviation belowthe mean.

2. The scores on a standardized mathematics test are normally distributed with a mean of 500 and a standard deviation of 120 . Which situation has a probability of0.025 of occurring for a randomly selected test score? Select all that apply.

A The test score is greater than 740.

B The test score is less than260.

C The test score is greater than 620.

D The test score is less than 120.

3.

Normal curves X, Y, and Z represent the wait times in the emergency rooms of three different hospitals. Which statement must be true? Select all that apply. Y X A Hospital Z has the longest wait time in the emergency room. B The range of wait times in the emergency rooms of all three hospitals is 8 minutes. C Hospital Z has the least standard deviation. D All three hospitals have the same mean wait time in the emergency room.Mr. Jackson's class took an end-of-topic assessment. The scores are normally distributed with a mean of 83 and a standard deviation of 5 . Part A Caroline and Emily are two students in the class. Caroline scored a 79 and Emily scored a 90. Calculate the s-score for each student. Caroline: Emily:The table displays the ages of the teachers at North Central High School. Enter a number in each box to determine the relative frequencyr of each interval to complete the table. Round to the nearest hundredth; Number of Relative Teachers Frequency Age {years}