According to the record of the registrar's office at a state
university, 40% of the students are freshmen, 30% are sophomores,
20% are juniors, and the rest are seniors. Among the freshmen,
sophomores, juniors, and seniors, the portion of students who live
in the dormitory are, respectively, 75%, 50%, 35%, and 15%.
If a randomly selected student does not live in the dormitory, what
is the probability that the student is a freshman?
In: Statistics and Probability
We will track an SRS of 300 recent PCC Math 243 students to see if they eventually take Math 244. Assume 15% of all PCC Math 243 students eventually take Math 244. The exact probability that p-hat will be not less than 18% is between: ???
Please show all steps and how to use calculate
In: Statistics and Probability
A recent news article stated that only 17% of college students between the ages of 18 to 24 years old voted in the last presidential election.
5. Assuming the voting rate stays the same, what is the probability that from a random sample of 500 college students from a local university, at least 20% will vote in the next presidential election?
In: Statistics and Probability
A graduate student surveyed 220 undergraduate students in a university last week, and found 165 of them prefer F2F classes to online classes. Test the claim that more than 70% of the students at this university prefer F2F classes at the 5% significance level. Include all 5 steps.
Need by 3pm pacific! please help me out !
In: Statistics and Probability
In: Statistics and Probability
A sample of college students was asked how much they spent monthly on coffee. Approximate the standard deviation for the cost. Monthly coffee cost ($) Number of students
10.00-19.99 6
20.00-29.99 20
30.00-39.99 . 23
40.00-49.99 18
50.00-59.99 . 6
The sample standard deviation for the cost is (Round to the nearest cent as needed.)
In: Statistics and Probability
A study of physical fitness tests for 12 randomly selected Pre-Medical students measured their exercise capacity (in minutes). The following data resulted:
34 19 33 30 43 36
32 41 31 31 37 18
Find the standard deviation and the variance for the sample data of the students' exercise capacity. Round to the nearest tenth.
In: Statistics and Probability
The students in University of Glasgow have done public survey and 200 people involved to the survey. It is proved that, 110 out of 200 people wish to get their master degrees in Us Universities. Compute the probability of randomly selected 7 students at least 6 of them wish to apply to US universities for their master degrees (according to the public survey)?
In: Statistics and Probability
A sample of college students was asked how much they spent monthly on pizza. Approximate the standard deviation for the cost.
Monthly pizza cost. total number of students
10.99-19.99 7
20.99-29.99 20
30.99-39.99 23
40.99-49.99 20
50.99-59.99 5
The sample standard deviation for the cost is (round to nearest cent)
In: Statistics and Probability
56 randomly selected male students where asked if they lived with their parents. 24 responded yes. 51 randomly selected female students were asked if they lived with their parents. 21 responded yes. Test the claim that more males live with their parents using a 0.05 level of significance. Make sure you show and explain your work.
In: Statistics and Probability