Determining the stats final scores

Assignment Help Mathematics

Reference no: EM131826606

Stats final scores. Each year about 1500 students take the introductory statistics course at a large university. This year scores on the final exam are distributed with a median of 74 points, a mean of 70 points, and a standard deviation of 10 points. There are no students who scored above 100 (the maximum score attainable on the final) but a few students scored below 20 points.

(a) Is the distribution of scores on this final exam symmetric, right skewed, or left skewed?

(b) Would you expect most students to have scored above or below 70 points?

(d) What is the probability that the average score for a random sample of 40 students is above 75?

(e) How would cutting the sample size in half affect the standard deviation of the mean?

Reference no: EM131826606

Questions Cloud

Determine if the following statements are true or false : True or false. Determine if the following statements are true or false, and explain your reasoning. If false, state how it could be corrected.

Explain what the idea of wrestling with god means for jews : Explain what the idea of wrestling with God means for Jews. The textbook refers to the story from Genesis chapter 32 in which Jacob is renamed Israel.

Define the term sampling distribution of the mean : Define the term "sampling distribution" of the mean, and describe how the shape, center, and spread of the sampling distribution of the mean change as sample.

Determining the housing prices : A housing survey was conducted to determine the price of a typical home in Topanga, CA. The mean price of a house was roughly $1.3 million

Determining the stats final scores : Stats final scores. Each year about 1500 students take the introductory statistics course at a large university.

Municipal and a corporate bond of equal risk-liquidity : A municipal and a corporate bond of equal risk, liquidity and maturity yield 6% and 10% respectively.

Identify distributions : The plot at the top is a distribution for a population. The mean is 60 and the standard deviation is 18.

How is dougla unique sense of graphic design impactful today : Address both the historical event (or topic within its time - frame context). How is Douglas' unique sense of graphic design impactful today.

Find the present value : Find the present value for, What happens to the PV as the interest rate changes?

User Account

All Pages