3 years ago

(PLEASE HELP DUE NOW! I DON'T UNDERSTAND!)

Mathematics

1 answer:

Alenkasestr [34]3 years ago

6 0

Answer:

Q3 = 34

Q1 = 24.5

Step-by-step explanation:

Q1 is the middle value in the first half of the data set.

Q3 is the middle value in the second half of the data set.

put the numbers in order

find the median

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Ture or False<br> The median better represents<br> the data than the mean.

maria [59]

Answer:

False

Step-by-step explanation:

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2 years ago

According to a study conducted by the Gallup Organization, the the proportion of Americans who are afraid to fly is 0.10. A rand

notsponge [240]

Answer: 0.1457

Step-by-step explanation:

Let p be the population proportion.

Given: The proportion of Americans who are afraid to fly is 0.10.

i.e. p= 0.10

Sample size : n= 1100

Sample proportion of Americans who are afraid to fly = $\hat{p}=\dfrac{121}{1100}=0.11$

We assume that the population is normally distributed

Now, the probability that the sample proportion is more than 0.11:

$P(\hat{p}>0.11)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}>\dfrac{0.11-0.10}{\sqrt{\dfrac{0.10(0.90)}{1100}}})\\\\=P(z>\dfrac{0.01}{0.0090453})\ \ \ [\because z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}} ]\\\\=P(z>1.1055)\\\\=1-P(z\leq1.055)\\\\=1-0.8543=0.1457\ \ \ [\text{using z-table}]$