Mathematics, 19.03.2020 17:18 cadez
It is estimated that the average test score for a statistics exam will be u = 70, with a variance of o2 = 12. In a random sample of 8 students, the test scores are 65, 73, 74, 68, 70, 74, 69, 71, giving us the sample statistics i = 70.5 and s? = 10. Assume a normal distribution of scores. Answer the following questions to determine if you would agree with the assumption of o2 or not.
(a) Use the sampling distribution of S2 to find the value of x2 corresponding to what is seen in the data, and our assumption about the population variance. Round your answer to 3 decimals.
(b) Find Xô.975 (df), where df is the degrees of freedom value corresponding to the statistic from Part 7a.
(c) Find Xô.025 (df), where df is the degrees of freedom value corresponding to the statistic from Part 7a.
(d) Would you agree with our assumption that the population variance is o2 = 12? Why or why not?
Answers: 2
Mathematics, 21.06.2019 16:40
Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u
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Mathematics, 21.06.2019 18:50
The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave
Answers: 1
It is estimated that the average test score for a statistics exam will be u = 70, with a variance of...
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