What percentage of students who completed the test review passed the test?

Blank are more representative of a population, but blank are easier to obtain

A consumer group wanted to determine if there was a difference in customer perceptions about prices for a specific type of toy depending on where the toy was purchased.  In the local area there are three main retailers: W-Mart, Tag, and URToy.  For each retailer, the consumer group randomly selected 5 customers, and asked them to rate how expensive they thought the toy was on a 1-to-10 scale (1= not expensive, to 10 = very expensive). The toy was priced the same at all retail stores. Compute the percentage of variance explained by the group differences for these data. Q: Percentage and variance explained = ?

Identify BOTH the populationand the samplefor thesituation below.A survey of 21pharmacists from Philadelphiafound that 87% of them are vaccinated

Sebastian throws 850 pitches, of which 782 are strikes. To a 1% level of significance, is he right in his boast that over 90% of his pitches (in general) are strikes?

answers to 4 decimal places where possible and assume a normal distribution. a. What is the distribution of X? X ~ N( b. What is the distribution of ¤? ¤ ~ N( c. What is the distribution of ) x? Σε-Ν( d. If one randomly selected runner is timed, find the probability that this runner's time will be between 23.5781 and 23.9781 minutes. e. For the 40 runners, find the probability that their average time is between 23.5781 and 23.9781 minutes. f. Find the probability that the randomly selected 40 person team will have a total time more than 964. g. For part e) and f), is the assumption of normal necessary? h. The top 10% of all 40 person team relay races will compete in the championship round. These are the 10% lowest times. What is the longest total time that a relay team can have and still make it to the championship No Yes round? minutes

Please help answering this one:

The Humane Society is interested in finding out how many households in America have at least one cat. How many households must be surveyed to be 95% confident that the estimate will be within 4% of the true population percentage?

To collect data about the amount of time students spend studying for exams, which of the following methods should a teacher use to lead to a sample that is the most representative of the students in the school? Survey all the students who are in their final year of high school. Survey all students who achieved over 85% on their report card last semester. Survey all the students who play football. Survey all the students in the classes that he or she teaches. Survey 20 randomly selected students from each grade.

It’s assumed that students need to stay awake more to study during finals week.  One way to measure this is how much coffee is consumed during Finals week at night.  A local coffee house near APU counted the number of cups of coffee sold per hour during Finals week after 6 p.m.  We randomly select ten (10) hours of sales records during Finals week and find out that the following number of cups of coffee were consumed: 18, 17, 22, 14, 17, 20, 22, 24, 15, 15 By comparison, the sales records from a previous week were used as a comparison.  The following number of cups of coffee were consumed over a seven (7) hour period: 9, 13, 5, 15, 17, 10, 11 a. Determine what is the appropriate statistical procedure, with a brief explanation (one sentence) as to why this is the appropriate procedure. b. State the null hypothesis. c. Execute the proper calculations with the appropriate procedures. d. Present a graph when appropriate of your results. e. Include any appropriate post-hoc tests. f. State…