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Question: Imagine your statistics professor lost all records of students' raw scores on a recent test. However, she did record students' z scores for the test, as well as the class average of 41 out of 50 points and the standard deviation of 3 points (treat these as population parameters). She informs you that your z score was 1.10.
a. What was your percentile score on this test?
b. Using what you know about z scores and percentiles, how did you do on this test?
c. What was your original test score?
Samples of three materials under consideration for the housing of machinery on a seagoing vessel are tested by means of a salt-spray test. Any sample that leaks when subject to a power spray is considered to have failed. The following are the tes..
The distribution of 800 test scores in an introduction to psychology course was approximately normal, with µ = 35 and s = 6.
While conducting a one-way ANOVA comparing five treatments with 10 observations per treatment, computed value for SST = 250 and MSE = 3 given. Find the value of F and also construct the ANOVA table?
A high of 10 was possible. A sample of five tests was selected from each group. The test grade results were: At the 0.01 level, what is the critical value?
Assume that Leo advertises "If it takes more than 30 minutes to get your pizza, you get it free". What percentage of his take-out pizzas will have to give away free?
If the mean lifetime of this type of component is 100 hours and its standard deviation is 19 hours, how many of these component must be in stock so that the probability of the system is in continual operations for the next 2,000 hours is at least ..
the rapid test is used to determine whether someone has hiv the virus that causes aids. the false-positive and
At the significance level 0.01 is there sufficient evidence to conclude that a difference exists in the mean time required for the elimination of the rash?
In a random sample of 10 cell phone users, what is the probability that exactly 2 have used their phones to access the Internet? More than 2?
An upscale restaurant offers a special fixe prix menu in which, for a fixed dinner cost, a diner can select from four appetizers, three salads, four entrees, and five desserts. How many different dinners are available if a dinner consists of one ..
two points are selected randomly on a line of length 40 so as to be on opposite sides of the midpoint of the line. in
What is the Pearson correlation coefficient and how strong is the relationship - How much of the variance in the relation between these two variables is unaccounted for?
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