A week in october the average temperature was 6 degrees celcius. The median was 5 degrees celcius. What was the typical value?
A week in october the average temperature was 6 degrees celcius. The median was 5 degrees celcius. What was the typical value?
The scores for a group of high school students in a national physics examination were normally distributed with a mean of 86 and a standard deviation of 4. If there were 97,680 students with scores...
Z-scores are used to interpret scores from any normal distribution or ratio scores. I was asked if the Z=0. Do you knw the answer?
After calculating the Pearson Correlation Coefficient r, under what circumstances should you continue and calculate a regression equation? Why?
After calculating the Pearson Correlation Coefficient r, under what circumstances should you continue and calculate a regression equation? Why?
Now suppose I have a hypothesis that if students have fish (brain food?) the evening before each assignment, they will perform better. How much better would they have to do in order for me to believe...
Suppose that company A and company B manufacture and supply equivalent parts to a customer. Among parts from company A, 5% are defective; among company B, 7% are defective. Suppose that a...
Important: n<30, so things are different that if n was large
A public bus company official claims that the mean waiting time for bus number 14 during peak hours is less than 10 minutes. Karen took bus 14 during peak hours on 18 different occasions. Her mean...
Explain random sampling and why it is important.
the failure rate in a statistics course is 20%. in a class of 30 students, find the probability that exactly five students will fail the course
I have been given values for 10%, 50% and 90% of a distribution. From these numbers, how can I compute the mean and standard deviation? I'll give an example....Temperature distribution 10th...
An experiment consists of first rolling a die and then tossing a coin. a. List the sample space. b. Let A be the event that either a three or a four is rolled first, followed by landing a...
On a reading comprehension test, it would be preferable to achieve a z score of a) 2.34 b) 3.50 c) 0.00 d) 1.00
the failure rate in a statistics course is 20%. in a class of 30 students, find the probability that exactly five students will fail the course
For sample of people playing a certain carnival game it took an average of 15 throws to score a basket the standard deviation is . At least what percentage of people score a basket in 11 to 19 throws...
What sample size is required in order that the standard deviation of X(with bar) be: A. 1/4 of the population standard deviation? B. 1/7 of the population standard deviation...
explain: Before concluding that a “cause and effect” relationship may exist for a set of paired observations (X,Y), one must first rule out alternative explanations that seem...
For year 2003, the SAT test scores were normally distributed with a mean of 1050 and a standard deviation of 150.What percentage of the SAT scores is above 1050?
Im currently trying to understand addition and multiplication probability I just need some assistance for a clearer understanding