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FIRST EXAM FINAL GRADE 62 74 73 93 88 68 82 79 85 91 77 72 94 96 65 61 91 92 74 82 85 93 98 95 a. Is the professor correct? Test with ? = 0.05. b. How accurately do the exam scores predict final grades? Compute the standard error of the estimate.
A die is rolled 60 times. An "ace" is the side with one dot. Use the normal approximation to estiate the chance of getting exactly 12 aces.
The smallest defect in a computer chip will render the entire chip worthless. Therefore, tight quality control measures must be established to monitor the chips.
Approximately 65% of all marketing personnel are extroverts, whereas about 50% of all computer programmers are introverts.
A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis for a test of significance.
Explain the effect outliers can have on the analysis of the center of this data set. Based on the box-plot and histogram you created for problem 1, do there appear to be any outliers?
A manufacturer of 35-mm cameras knows that a shipment of 30 cameras sent to the large discount store contains 8 defective cameras. The manufacturer also knows that the store will choose two of the cameras at a random, test them, and accept the shi..
Find the degrees of freedom for unequal variance test. (Round down your answer to the nearest whole number.) State the decision rule for .05 significance level. (Round your answer to 3 decimal places.)
What is the chance that the number who say "yes" in a properly drawn random sample of 500 will be smaller than 360?
If an urn is selected at random and a ball is drawn, find the probability it will be red.
How many questions must the test contain in order to reduce the standard deviation of Julie's proportion of correct answers to one-fourth its value for an 100-item test?
A certain random experiment can result in one of four different possible outcomes, which we'll call A, B, C and D.
Compute the sample variance and the sample standard deviation for these data (to 2 decimals).
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