Mathematics, 05.12.2019 00:31 caitlynnstokes
Each year about 1500 students take the introductory statistics course at a large university. this year scores on the nal exam are distributed with a median of 74 points, a mean of 70 points, and a standard deviation of 10 points. there are no students who scored above 100 (the maximum score attainable on the nal) but a few students scored below 20 points.
(a) is the distribution of scores on this nal exam symmetric, right skewed, or left skewed?
(b) would you expect most students to have scored above or below 70 points?
(c) can we calculate the probability that a randomly chosen student scored above 75 using the normal distribution?
(d) what is the probability that the average score for a random sample of 40 students is above 75?
(e) how would cutting the sample size in half aect the standard error of the mean?
Answers: 2
Mathematics, 21.06.2019 14:30
Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.
Answers: 3
Mathematics, 21.06.2019 21:30
X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /
Answers: 3
Mathematics, 22.06.2019 02:00
The null and alternate hypotheses are: h0: μ1 ≤ μ2 h1: μ1 > μ2 a random sample of 22 items from the first population showed a mean of 113 and a standard deviation of 12. a sample of 16 items for the second population showed a mean of 99 and a standard deviation of 6. use the 0.01 significant level. find the degrees of freedom for unequal variance test. (round down your answer to the nearest whole number.) state the decision rule for 0.010 significance level. (round your answer to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? use the 0.01 significance level.
Answers: 1
Mathematics, 22.06.2019 03:10
Which function has an inverse that is also a function? a.{(-4,3), (-2, 7), (-1,0), (4, -3), (11, -7)} b.{(-4, 6), (-2, 2), (-1, 6), (4,2), (11, 2)} c.{(-4,5), (-2, 9), (-1,8), (4, 8), (11,4)} d.{(-4,4), (-2, -1), (-1,0), (4, 1), (11, 1)}
Answers: 3
Each year about 1500 students take the introductory statistics course at a large university. this ye...
History, 23.02.2021 20:10
Mathematics, 23.02.2021 20:10
Chemistry, 23.02.2021 20:10
Mathematics, 23.02.2021 20:10
Computers and Technology, 23.02.2021 20:10
History, 23.02.2021 20:10
Mathematics, 23.02.2021 20:10
Spanish, 23.02.2021 20:10
History, 23.02.2021 20:10
History, 23.02.2021 20:10
Geography, 23.02.2021 20:10
History, 23.02.2021 20:10
English, 23.02.2021 20:10
Mathematics, 23.02.2021 20:10