A poll conducted in 2013 found that the proportion of of U. S. adult Twitter users who get at least some news on Twitter was 0.52. The standard error for this estimate was 0.024, and a normal distribution may be used to model the sample proportion.

1. Construct a 99% confidence interval for the proportion of U. S. adult Twitter users who got some news on Twitter. Round to three decimal places.

? to ?

2. Identify each of the following statements as true or false.

? True False 1. Since the standard error is 2.4%, we can conclude that 97.6% of all U. S. adult Twitter users were included in the study.

? True False 2. If we construct a 90% confidence interval for the percentage of U. S. adults Twitter users who get some news through Twitter, this confidence interval will be narrower than a corresponding 99% confidence interval.

? True False 3. Based on the interval, it is reasonable to believe that at least half of U. S. adult Twitter users get some news through Twitter.

? True False 4. If we want to reduce the standard error of the estimate, we should collect less data.

answer: (1,3) and (-2,0) i think.

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

can you complete your sentence? i could !