In a recent year, a sample of grade 8 Washington State public school students taking a mathematics assessment test had a mean score of 281 with a standard deviation of 34.4. Possible test scores could range from 0 to 500. Assume that the scores are normally distributed. Question 9 (2.5 points) If 2000 students are randomly selected, how many would you expect to have a score between 250 and 305?

The  number is   students

Step-by-step explanation:

From the question we are told that

    The population mean is  

     The standard deviation is  

    The sample size is  n = 2000

percentage of the would you expect to have a score between 250 and 305 is mathematically represented as

Generally  

So  

From the z table  the value of  

                                         and  

The  percentage is  

The  number of students that will get this score is

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step-by-step explanation: