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Assume that the mean of a distribution of test scores is 70, with a standard deviation of 5. You've been told that your score is two standard deviations above the mean. What is your test score?
Randomly chosen circulated nickels were weighed by statistics student Dorothy Duffy as an independent project. Nickels were weighed on a Mettler PE 360 Delta Range scale, accurate to 0.001 gram. The coin's age is the difference between the current ye..
1. In a basket there are 6 red marbles and 4 blue marbles. What is the probability of drawing a red marble--P(R)? 2. In a basket there are 6 red marbles and 4 blue marbles. Given that you have selected a red marble and have placed it in the basket,..
If this condition is not met, you cannot complete the problem.
Distances from the past year and carry out a hypothesis test for its suspicion. State the null hypothesis and the alternative hypothesis that it would use for this test.
Mean output of solar cells of three types are measured six times under random light intensity over a period of 5 minutes, yielding the results shown. Research Question: Is the mean solar cell output the same for all cell types?
Your company has a contract to perform preventive maintenance on thousands of air-conditioners in a large city. Based on service records from previous years.
a. Construct an ANOVA table. b. At the 5 % significance level, can you conclude that average scores produced by the four different rounds differ?
In a study, the carapace lengths (in mm) of Thenus lobster caught near Singapore measured: 78,66,65,63,60,60,58,56,52 and 50 ( the population data is approximately normal).
a researcher uses a repeated-measures design to compare individuals performance before treatment with their performance
The following table represents the exam grades from 36 students from a certain class that I might have taught. Construct a frequency distribution with 9 classes ranging from 56 to 100.
1. The local county is considering a budget proposal that would reallocate funding to renovate the city pools. A survey is conducted to measure public opinion of the proposal. A total of 200 individuals responded to the survey. Fifty of the respon..
Evaluate whether both proposed designs would achieve the same mean unconfined compressive strength of core (in psi) or not at .05 under equal (σ12=σ22) *AND* unequal (σ12≠σ22) variance assumptions.
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