Afriend tells you that she has conducted a survey to find the proportion of people in her university that utilize the campus internet cafe at least once a day. she has collected a sample and calculated a sample proportion of p^ = 0.31. she uses this value to calculate a confidence interval for the population proportion. your friend says that she is not going to tell you the sample size or the level of confidence used in her construction, and wants you to guess what the confidence interval is. she gives you 5 options.
select the interval(s) that, based on the information given, could possibly be the confidence interval your friend calculated:
a. the interval between 0.68 and 0.88
b. the interval between 0.58 and 0.78
c. the interval between 0.48 and 0.78
d. the interval between 0.58 and 0.88
e. the interval between 0.48 and 0.68

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24

i wish i could you, i have no idea how to answer this

step-by-step explanation:

fabric (square meters)                   cloaks

7                                                           21

4/3                                                         4

step-by-step explanation:

we are told that harry needs 2 square meters of fabric for every 6 wizard cloaks he makes.

1. first of all we will find how many cloaks can be made from 1 square meter of fabric by dividing 6 by 2.

we can see that 3 cloaks can be made from 1 square meter of fabric. now we will multiply 3 by 7 to find number of cloaks made from 7 square meters of fabric.

therefore, harry will make 21 cloaks from 7 square meters of fabric.

2. let us find how many square meters of fabric will be needed to make 4 cloaks.

first of all we will find fabric needed for 1 cloak by dividing 2 by 6.

we can see that fabric needed for 1 cloak is   square meter. now we will multiply   by 4 to find fabric needed for 4 cloaks.