You want to determine the average number of songs people keep on their MP3 players. You want to collect data from a random sample of at least 300. Which of these would be the most valid method of collecting data?
a. Survey students coming in and out of your school cafeteria.***?
b. Survey an equal number of students, teachers, parents, and grandparents. (if not a, then this b)
c. Survey the residents in a retirement community.
d. Survey the people coming in and out of the grocery store on a Sunday morning.
Your English teacher has decided to randomly assign poems for the class to read. The selection of poems includes four poems by Shakespeare, five poems by Coleridge, two poems by Tennyson, and two by Lord Byron.
What is the probability that you will be assigned a poem by Shakespeare and then a poem by Tennyson?
2/39
8/169
6/13***?
8/13
Please check? Thanks
for the survey, (b) looks better to me
for the poems, you have (4/13)(2/12)
the second one is 2/39
To determine the average number of songs people keep on their MP3 players, it is important to collect data from a random sample of at least 300. This helps ensure that the sample represents the larger population accurately.
Among the given options, the most valid method of collecting data would be to survey an equal number of students, teachers, parents, and grandparents (option b). This is because it includes a diverse range of individuals who are likely to have different preferences and habits when it comes to storing songs on their MP3 players. This diverse sampling approach helps to obtain a more representative view of the average number of songs people keep on their MP3 players.
Regarding the probability of being assigned a poem by Shakespeare and then a poem by Tennyson, we need to calculate the probability of these two events occurring consecutively.
The total number of poems in the selection is 4 + 5 + 2 + 2 = 13.
The number of poems by Shakespeare is 4, and the number of poems by Tennyson is 2.
To calculate the probability of both events happening consecutively, we first calculate the probability of being assigned a poem by Shakespeare (4/13), and then multiply it by the probability of being assigned a poem by Tennyson (2/12, since one poem has already been assigned).
Therefore, the probability of being assigned a poem by Shakespeare and then a poem by Tennyson is (4/13) * (2/12) = 8/156 = 2/39.
Thus, the correct answer is 2/39, not 6/13 as you initially suggested.
Please let me know if there is anything else I can help with!