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QUESTION #1
A random sample of 40 binomial trials resulted in 18 successes. Test the claim that the population proportion of successes does not equal 0.50. Use a level of significance of 0.05.
(a) Can a normal distribution be used for the p^ distribution? Explain.
(b) State the hypotheses.
(c) Compute p^ and the corresponding standardized sample test statistic.
(d) Find the P-value of the test statistic.
(e) Do you reject or fail to reject H0? Explain.
(f) What do the results tell you?
An advantage of the permutation test over the t test for a difference in means is that - distribution interval or a bootstrap percentile interval
Assume that the average life of a bulb is 1,000 hours and that this failure time follows the exponential distribution. What is the probability that a randomly selected bulb will last between 900 and 1200 hours? Round to four decimal places
Joe collected a questionnaire from 28 students in his school on their attitudes toward the local science fair. Joe wanted to test the following null hypothesis:
Four homes are selected at random: What is the probability all four of the selected homes have a security system? (Round your answer to 4 decimal places.
Assume we want to use a 0.10 significance level to test the claim. (a) Identify the null hypothesis and the alternative hypothesis. (b) Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will r..
Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video.
If statistically significant, do you think the difference is large enough to be important?
What is the probability that the sensory memory will last for at most 200 milliseconds? Find the median time the sensory memory will last
wasserman and wadsworth 1989 discuss a process for the manufacture of steel bolts that continuously feed an assembly
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
What is wrong with Denzel Washington's logic (give the answer in both z scores and percentile ranks).
If its weekly cost function is C(x)=68,000+150x, how should the manufacturer set the size of the rebate in order to maximize its profit?
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