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Problem: You want to estimate the average score in statistics in your college, for this purpose, you have asked 5 students for their test scores, and you came up with the folowing data: 62, 76, 82, 85, 96.
Required:
A) Based on this information, provide an estimation for the average test score
B) Based on this information, construct a 90% confidence interval for the average score in statistics
Consider two earthquakes, both of magnitude greater than 3, what is the probability that th e magnitude of the smaller earthquake is greater than 4?
Convert the following proportions to percentages, preserving the accuracy in the proportion:
If you want to be 99% confident of estimating the population proportion to within an error of ±0.04, what sample size is needed?
a study was done on the propagation of an ultrasonic stress wave through a substance. in particular attenuation in
toss a fair die twice and record the numbers. find the probability that the first number is 3 given that the sum of two
Were the chi-square and regression tests presented and used correctly? Could the authors' analysis be recreated?
The Edison Electric Institute has published figures on the annual number of kilowatt hours expended by various home appliances.
A population has a mean=83 and a standard deviation=9. Find the mean and standard deviation of a sampling distribution of sample means with sample size=81.
Describe a psychological research situation or scenario that would use a nonparametric test. Why would the nonparametric test be used?
q1. consider an investment portfolio of 50000 in stock a and 50000 in stock b. the expected value of a is 9.5 and b is
What does a z-score measure? What does standardizing a normal distribution do to the mean? Is X ~ N(0, 1) a standardized normal distribution? Why or why not?
A certain queueing system has a Poisson input, with a mean arrival rate of 4 customers per hour. The service-time distribution is exponential, with a mean of 0.2 hour.
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