Question

help please

Answer 1

@Vocaloid

Answer 2

@Ultrilliam

Answer 3

Ima say B for self explanatory reasoning

Answer 4

ima say this one

Answer 5

I'm confused on this one actually...

Answer 6

@JustSaiyan

Answer 7

hm. the data tells us that 0.29 is very unlikely so that eliminates b and d

Answer 8

the question isn't written well but I would say 0.40 is plausible based on the data so A?

Answer 9

i guess

Answer 10

hint: is 3.25 on the dot plot?

Answer 11

that is, is there a dot at or above 3.25?

Answer 12

no?

Answer 13

good

so 3.25 is outside the range of what could happen by chance, making the answer statistically significant

Answer 14

C?

Answer 15

i think thats what it is

Answer 16

hint: the answer IS statistically significant

which answer choice matches?

Answer 17

A

Answer 18

awesome

Answer 19

first step: 12.1 - 8.9 = ?

Answer 20

3.2

Answer 21

good, and is 3.2 on the dot plot?

Answer 22

no

Answer 23

good, so that means it's outside the range and it is statistically significant

which answer choice matches?

Answer 24

B

Answer 25

good

Answer 26

so how was that new job going for you?

Answer 27

was it being a teacher or something?

Answer 28

sorta yea, it's ok

Answer 29

nice, g4u

Answer 30

i have another few question i need to have help on

Answer 31

@Vocaloid if you can help

Answer 32

sure

Answer 33

A sample proportion of 0.62 is found. To determine the margin of error for this statistic, a simulation of 200 trials is run, each with a sample size of 100 and a point estimate of 0.62.

The minimum sample proportion from the simulation is 0.73, and the maximum sample proportion from the simulation is 0.97.

What is the margin of error of the population proportion using an estimate of the standard deviation?



±0.02

±0.08

±0.12

±0.16

Answer 34

i'm not sure how to do this without using a z-table

let me try finding something on the internet

Answer 35

find anything?

Answer 36

Why do you do this to me, @Ultrilliam

Answer 37

still looking

Answer 38

......

Answer 39

@Vocaloid you can jsut look one up on google i think

Answer 40

formula for error margin: +/- z * sqrt(p*(1-p)/n)

the second part is easy to find since we are given p and n

Answer 41

sqrt(p*(1-p)/n) = 0.0485

I'm just not sure what we're supposed to use for z because the usual values aren't giving me an answer in the choices

Answer 42

oof, this is tricky..

Answer 43

there's an alternative formula that's just standard deviation/sqrt(n)

the "estimate" for standard deviation is range/4 which is 0.06 but that doesn't work either since 0.06/sqrt(100) = 0.006

Answer 44

D?

Answer 45

sure, I don't have a better answer than that

Answer 46

The results of a survey indicate that between 76% and 84% of the season ticket holders are satisfied with their seat locations.

What is the survey’s margin of error?

Answer 47

were you given a formula for margin of error, given range? I am not aware of such a formula existing

Answer 48

otherwise my best guess would just be range/2 which is just (0.84-0.76)/2 = 0.04

Answer 49

The results of a survey indicate that the true proportion of households who recycle paper products is likely in the interval (0.61,0.7).

What is the point estimate of the proportion of households who recycle paper?



Enter your answer, as a decimal

Answer 50

the halfway point maybe? (0.61+0.7)/2 ?

Answer 51

0.655

Answer 52

yeah that's my best guess

Answer 53

Based on a poll of 500 citizens, a property development group claims that 54% of the population is in favor of the construction of a new hotel near the airport. An environmental group claims that the poll is not valid and that only 38% of the citizens favor the construction of the hotel.

To determine whether this sample supports the population proportion of 0.54, a simulation of 100 trials is run, each with a sample size of 200 and a point estimate of 0.38. The minimum sample proportion from the simulation is 0.32, and the maximum sample proportion from the simulation is 0.50.

The margin of error of the population proportion is found using an estimate of the standard deviation.

What is the interval estimate of the true population proportion?



(0.42,0.66)

(0.29,0.47)

(0.26,0.5)

(0.32,0.44)

Answer 54

I'm not sure what formula they want to use for this :s

D seems like the only reasonable answer

Answer 55

maybe i should screenshot

Answer 56

A recent poll taken by the national ice cream industry shows that 32% of the population names vanilla as its favorite ice cream flavor. A sample of 200 people shows that only 20% of those polled names vanilla as their favorite ice cream flavor.

To determine whether this sample supports the population proportion of 0.32, a simulation of 100 trials is run, each with a sample size of 50 and a point estimate of 0.20. The minimum sample proportion from the simulation is 0.16, and the maximum sample proportion from the simulation is 0.28.

What is the margin of error of the population proportion using half the range?



±0.02

±0.04

±0.06

±0.08

Answer 57

half the range is just (0.28-0.16)/2

Answer 58

so ±0.06 i think

Answer 59

alright

Answer 60

i got a 60%, though its alright

Answer 61

soz bruh