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zhannawk [14.2K]
3 years ago
14

Concert marketing: The college’s performing arts center wanted to investigate why ticket sales for the upcoming season significa

ntly decreased from last year’s sales. The marketing staff collected data from a survey of community residents. Out of the 110 people surveyed, only 7 received the concert brochure in the mail.
Which of the following is a reason that the marketing staff should not calculate a confidence interval for the proportion of all community residents who received the concert brochure by mail? Check all that apply.

A) The sample needs to be random, but we don’t know if it is.

B)The actual count of community residents who received the concert brochure by mail is too small.

C)The actual count of students who community residents who didn’t receive the concert brochure by mail is too small.

D) n(p‐hat) is not greater than 10.

E) n(1 minus p‐hat) is not greater than 10.
Keep in mind, this is a Check all that apply question.

Answer:
A, B, D
Mathematics
1 answer:
Vesnalui [34]3 years ago
8 0
Answer- a,b,d!!!! (i believe)
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MariettaO [177]

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Step-by-step explanation:

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3 years ago
given the two points (-24,7) and (30,25) a. What is an equation passing through the points? b. Is (51, 33) also on the same line
kicyunya [14]
Part 1) <span>Given the two points (-24,7) and (30,25) a. What is an equation passing through the points?

step 1
find the slope m
m=(y2-y1)/(x2-x1)----></span>m=(25-7)/(30+24)----> m=18/54----> m=1/3

step 2
wit m=1/3 and the point (30,25)
find the equation of the line
y-y1=m*(x-x1)-----> y-25=(1/3)*(x-30)--->y=(1/3)*x-10+25
y=(1/3)*x+15

the answer Part 1) is
y=(1/3)*x+15

Part 2) <span>Is (51, 33) also on the same line?
</span>if the point (51.33) is on the line y=(1/3)*x+15
then
for x=51 the value of y must be 33
for x=51
y=(1/3)*51+15----> y=17+15----> y=32
32 is not 33 
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<span>the point does not belong to the given line
</span>
the answer Part 2) is
the point does not belong to the given line

see the attached figure

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Answer:

b-3

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is the correct answer

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