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Let X1 ,X2 , • • • ,X. be a random sample from a distribution with p.d.f. /( x; 8) = ex" - 1 , 0 x oo, zero elsewhere, where 8 > 0. Find a sufficient statistic for (J and show that a uniformly most powerful test of H0 : 8 == 6 against H1 : (J <>6 is based on this statistic.
Use value you found in part a to find out degree of confidence for interval 65.65
The class ends the year with a mean of 68 and a stadard deviation of 9, the prof decides to bell curve the marks so that the top 10% gets an A (80%). What z score must a student achieve to recieve an A? What raw grade does this correspond to?
The Department of Labor wants to estimate the percentage of females in the U.S. labor force to within ±5%, with 90% confidence. How many employment records should be sampled?
discuss reliability and validity in qualitative
At the .05 significance level, can Macaray conclude that the population means are different? Note that you should show all 5 steps in the test of hypothesis.
at a community college it is known that the grade point average gpa of all students has a distribution which is both
40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of significance, test to see if the proportion of voters has changed. Calculate the value of the Chi-Square Test Statistic for this problem. What is it?
Motorola used the normal distribution to determine the probability of defects and the number of defects expected in a production process.
Discuss how the null and alternative hypothesis for one-sample testing differs from two-sample testing; and explain how these two hypothesis' are the same, and provide a numerical example?
Suppose a population proportion is .40, and 80% of the time when you draw a random sample from this population you get the sample proportion of .35 or more.
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
A recent study stated that if a person chewed gum, the average number of sticks of gum he or she chewed daily was 8. To test the claim, a researcher selected a random sample of 36 gum chewers and found the mean number of sticks of gum chewed per d..
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