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Evgesh-ka [11]
2 years ago
12

L4xl=4 pls help me will mark brainliest

Mathematics
1 answer:
ddd [48]2 years ago
8 0

Answer:

1

Step-by-step explanation:

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(1 point) A random sample of 600 movie goers in Flagstaff found 252 movie goers who had bought popcorn on their last visit. Find
garik1379 [7]

<u>Answer-</u>

A 95% confidence interval for the true percent of movie goers is 36.41% to 44.25%

<u>Solution-</u>

Given,

n = 600 (sample size)

x = 252 (number of people who bought)

Confidence interval = 95%, so z = 1.96

We know that,

\mu = M\pm Z(SE)

where,

M = sample mean

Z  = Z statistic determined by confidence level

SE = standard error of mean

Calculating the values,

M=\frac{x}{n} =\frac{242}{600} =0.4033

Z=1.96 from the tables

SE=\sqrt{\frac{M\times (1-M)}{n}}

\Rightarrow SE=\sqrt{\frac{0.4033\times (1-0.4033)}{600}}=0.02

Putting all the values in the formula,

\mu = M\pm Z(SE)

\mu = 0.4033\pm 1.96(0.02)

=0.4033\pm 0.0392

=0.4425, 0.3641

= 44.25\%,36.41\%

5 0
3 years ago
What is the best estimate of the mean age of all the people in the tour group?
marissa [1.9K]
Mean = (19 +27 +25+21+44+22+45+34)/8 = 29.625≈30 years

Answer is 30.
7 0
2 years ago
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A.<br><br> b.<br><br> c.<br><br> d.<br> please help me
Yuliya22 [10]

Answer:

b

Step-by-step explanation:

the answer is - 11/12

6 0
3 years ago
Find the place and value of the 4 in 1284.39.​
inysia [295]

Answer:

It is in the ones place and the value is 4

Step-by-step explanation:

7 0
3 years ago
Does someone know how to do this?
amid [387]

3√x+2 = √x+4

divide both sides by 3

√x+2 = √x+4 / 3

remove radical by squaring both sides

x+2 = x+4/9

x+2 = x/9 + 4/9 =

8x/9 = -14/9

8x*9 = -14*9=

72x = -126

x = -7/4

8 0
3 years ago
Read 2 more answers
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