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A professor wonders whether a student's homework average (X) could be used to predict their final grade in the course (Y). She calculates a least-squares regression line, based on data from randomly selected students, and gets Y = 21.839 + 0.724 X. Please use this information to answer Questions hypothesis to use for resolving this question?
μ1≠μ2
μd≠0
β1≠0
p 1 ≠ p 2
At least one of the means is different from at least one of the others.
A student's final course grade is not independent of their homework average.
A student's final course grade is independent of their homework average.
Predict a student's course grade, if their homework average is 85 pts
Consider the variable "type of birth control practiced" (e.g. IUD, condoms, none, etc.O) Which measure of variability is best suited to describe variation of this variable?
A gambler decides to keep betting on red at roulette, and stop as soon as she has won a total of five bets.
Which are the blocks in this experiment: the different diagnoses (asthma, and so on) or the type of care (nurse or doctor)? Why?
Dowsing. In a rural area, only about 30% of the wells that are drilled find adequate water at a depth of 100 feet or less.
Based on these values, find the sample size required to provide an estimate of the mean TRAP with a margin of error of 1.5 U/l for 95% confidence
An interactive poll found that 314 of 2,278 adults aged 18 or older have at least one tattoo.
What are the variables and units in this regression?- What units does the slope have?- Do you think the slope is positive or negative? Explain.
serum ferritin is used in diagnosing iron deficiency. in a study conducted recently researchers discovered that in a
If the manufacturer wants to have to replace only 1% of its televisions, what should its warranty be?
the rank correlation coefficient is used when one isa not interested in drawing inferences from the the studyb
Conduct a study to examine the relationship between party affiliation and gender. You find the following:
Discuss each of the four types of questions. In each of the following instances, determine if a direct, nondirective, rephrasing, or redirect question is being
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