Mathematics, 22.07.2021 20:20 PearlJam819
The scores of students on a standardized test are normally distributed with a mean of 300 and a standarddeviation of 40.
(a) What proportion of scores lie between 220 and 380 points?
(b) What is the probability that a randomly chosen student scores is below 260?
(c) What percent of scores are above 326.8 points?
Answers: 2
and standard deviation 
, the z-score of a measure X is given by:
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 23:20, ajbrock1004
In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?
Answers: 2
Mathematics, 22.06.2019 02:20, LillySchool6529
Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?
Answers: 3
You know the right answer?
The scores of students on a standardized test are normally distributed with a mean of 300 and a stan...
Questions in other subjects:
Mathematics, 21.02.2021 14:00
English, 21.02.2021 14:00
Biology, 21.02.2021 14:00
English, 21.02.2021 14:00
