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Several years? ago, 43?% of parents who had children in grades? K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,155 parents who have children in grades? K-12 if they were satisfied with the quality of education the students receive. Of the 1,155 ?surveyed, 495 indicated that they were satisfied. How do I construct a 90?% confidence interval to assess whether this represents evidence that? parents' attitudes toward the quality of education have changed.
Multiple choice. You take a quiz with 6 multiple choice questions. After you studied, you estimated that you would have about an 80% chance of getting.
A Catholic priest believes that a higher proportion of women in his congregation regularly attend services than the men in his congregation.
a roulette wheel has 38 slots numbered 0 00 and 1 to 36.the slots 0 and 00 are colored green 18 of the others are red
Which of the following encompasses an "claim" involved in a hypotheses test.
Testing cars. A clean air standard requires that vehicle exhaust emissions not exceed specified limits for various pollutants.
Suppose we have the following data: From a normally distributed population we take a sample of size 25, the mean of the sample is 2.2 and the sample standard deviation is 0.42.
If a class of 30 students is chosen at random from the university population, find the mean and variance of the number of male students.
Entire batch will be rejected if at least one of those tested is defective. Determine the probability that entire batch will be rejected?
Life at work (1.1) The University of Chicago's General Social Survey asked a representative sample of adults this question.
Write down the null and alternate hypotheses.Do the observed data contradict the hypothesis? Formulate and test the appropriate hypotheses at the 5% level of significance. Use the critical value approach.
If X1 and X2 are independent random variables having exponential densities with the parameters a and b the probability density of Y = X1+ X2 when a not eqal to b
An automobile club claims that the average time for a non-stop trip from new york city to Washington, D.C. by automobile is 4.5 hours. A disbelieving driver feels that the claim is incorrect.
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