What is the variance and standard deviation of the scores for my first test? Use formulas and show work.  Scores: 96 92 90 88 87 84 82 80 79 76 72 68 55

The scores on the Accuplacer test and High School GPAS are normally distributed. The Accuplacer test had a mean of 35 and a standard deviation of 9. High School GPAS had a mean of 2.8 and a standard deviation of 0.2. What high school GPA do you need to equal a score of 56 on the Accuplacer test? Give answer to two decimal placés. Check Answer

Explain the statistics measure standard deviation. Provide the formulas used to calculate the standard deviation of a sample and of a population.  Explain the difference between sample and population.

Find the indicated IQ score. The graph to the right depicts IQ scores of​ adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.   Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING...                 x 0.9         A graph with a bell-shaped curve, divided into 2 regions by a line from top to bottom, on the left side. The region right of the line is shaded and labeled 0.9. The x-axis below the line is labeled "x".       Question content area bottom Part 1 The indicated IQ​ score, x, is enter your response here. ​(Round to one decimal place as​ needed.)