The national average SAT score (for verbal and math) is 1028. Assume a normal distribution with σ=92   What is the 78th percentile score? (Round the answer to the nearest whole number.)

Q: e whether each statement is true or false and briefly explain your answer  You have a sample of 100…

A: It is given that we have a sample of 100 observations from a Normal distribution with an unknown…

Q: In a normal curve, around ______ of the curve falls between -1 and +1 standard deviations of the…

A: empirical rule: approximately 68 -95 -99.7% of data fall within 1 sd -2 sd- 3sd of mean for normal…

Q: If the grades are normally distributed and 8 students received a B, how many students took the…

A: Let C denote the grades of students. Given that X follows N(mean = 82, SD = 5), then  Z = (X -…

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: According to Empirical rule (68-95-99.7 rule) Given that the middle 68% of the scores fall…

Q: What is the 99.5th percentile in a t-distribution with 9 degrees of freedom?     a. 3.250 b. 3.169…

A: Solution-: We want to find  99.5th percentile in a t-distribution with 9 degrees of freedom?

Q: Draw a vertical line through a normal distribution for each of the following z-score locations.…

A: a. For Z=-2.00 The body is on the right side of the line and its proportion in the body is 0.9772.

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.