Mathematics, 26.07.2019 00:10 MyaaaMoney
Construct the indicated confidence interval for the difference between the two population means. assume that the twosamples are independent simple random samples selected from normally distributed populations. do not assume that thepopulation standard deviations are equal.
a researcher was interested in comparing the gpas of students at two different colleges. independent simple random samples of 8 students from college a and 13 students from college byielded the following gpas.
college a | college b
3.7 | 3.8 2.8
3.2 | 3.2 4.0
3.0 | 3.0 3.6
2.5 | 3.9 2.6
2.7 | 3.8 4.0
3.6 | 2.5 3.6
2.8 | 3.9
3.4 |
construct a 95% confidence interval for μ1-μ2, the difference between the mean gpa of college astudents and the mean gpa of college b students.
(note: x1= 3.1125, x2= 3.4385, s1= 0.4357, s2= 0.5485.)
a. -0.78 < μ1-μ2< 0.13
b. -0.75 < μ1-μ2< 0.10
c. -0.81 < μ1-μ2< 0.15
d. -0.70 < μ1-μ2< 0.057
Answers: 3
Mathematics, 21.06.2019 15:00
Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )
Answers: 1
Mathematics, 21.06.2019 21:30
In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?
Answers: 1
Mathematics, 22.06.2019 00:30
The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase
Answers: 1
Construct the indicated confidence interval for the difference between the two population means. ass...
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