Length of Pregnancy. A woman wrote to Dear Abby and claimed that she gave birth 308 days after a visit from her husband, who was in the Navy. Kengths of pregnancies have a mean of 268 days and a standard deviation of 15 days, Find the z score for 308 days. Is such a length unusual? What do you conclude?

1. Use the appropriate descriptive statistics from W2 A2.
2. Assuming that the sample statistics you computed are exactly equivalent to the corresponding population parameters, identify the following:
- What score on recall at Time1 would correspond to an extremely high score?
- What score on recall at Time1 would corresp

Setting ยต = 60 and σ = 7
What is the z score of 78?
What is the z score of 45?
What is the probability of 59?
What is the probability of 62?
What score falls at z = 1.64?
What score falls at z = -1.96?
What percentage of scores are 73 or less?
What proportion of scores is between 45 and 78?

Jessica must finish two courses (much like myself), statistics and economics, in order to complete the requirements for a BA degree. All along she has maintained an 80% average. She has calculated probabilities of scoring in the remaining two courses as follows:
Probability of scoring 80 in Statistics= 0.80
Probability of sc

Why it is possible to easily convert standard scores from one scale to another. When using these score listed below the mean and standard deviation of each of the transformed scores and the theoretical rationale for their equivalency for an example.
Person A z-score of 1.0
CEEB Score = 600
IQ Score = 115
AP Score = 82%

Q4) In a statistics course, there are five examinations. A student receives scores of 83, 85, 80, and 81 on the first four exams. What score must the student get on the fifth exam in order to have a mean average of 80 for the five exams? Explain your answer.

Z-Scores
Using the appropriate descriptive statistics from your Week 2 final project assignment and assuming that the sample statistics you computed are exactly equivalent to the corresponding population parameters, identify:
What score on the pre-treatment Revised Children's Manifest Anxiety Scales (RCMAS) would correspon

A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.

On a test whose distribution is approximately normal with a mean of 50 and a standard deviation of 10, the results for three students were reported as follows:
Student Opie has a T-score of 60.
Student Paul has a z-score of -1.00.
Student Quincy has a z-

1. What is the term Bayesian statistics used to indicate?
2. What are the states of nature?
3. What is a variable?
4. What is a z score?
5. How does a z score differs from a t score?
6. What does the symbol sX represent?
7. What is the symbol for standard deviation?
8. What is one formula that we can use to calcula

Given a mean of 60, with a standard deviation of 12, and with a raw score of 75, find
(a) the z-score,
(b) percentile rank,
(c) t-score,
(d) SAT score and
(e) Stanine score
Discuss why there are so many kinds of standardized scores.