a. What is the percentage of grades that are less than 83? b. What is the percentage of grades that are greater than 65 and 89? c. What is the z-score for grade = 70?

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A: n = 900 x = 363 P0 = 0.57

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Q: 95 percent divided .025 what is the z score?

A: The z-score is obtained as given below: PZ≤z=0.025z=ϕ-10.025=-1.96  Using Standard normal table

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Q: What percent of scores are below a T score of 56?

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A: Mean is generally represented as total sum of all observations divided by number of observations.…

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A: Given data: Male: 154, 157, 187, 163, 167, 159, 169, 162, 176, 177, 151, 175, 174, 165, 165, 183,…

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A: Given; Mean score of 8 players is 14.5 and mean score of 7 players is 12.

Q: x-bar = 45.5, s = 4.81, N = 50   1.) 17% thought of the class thought I was younger than what age?…

A: Given that, x-bar = 45.5, s = 4.81, N = 50

Q: Could you explain where t-score = -1.97 for 5% come from? I don´t see anywhere

A: The sample size n is 221.

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Q: what is the mean of 2.3, 4.6, 5.7, 11.8. Also should it be rounded? my solution 10.3  /2= 5.15

A: Answer:- Given data,  2.3, 4.6, 5.7, 11.8  Using formula,  Mean = Sum of the terms/Number of terms

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Q: hich is the most accurate way to estimate 32% of 79

A: To determine which is the most accurate way to estimate 32% of 79.