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MArishka [77]
3 years ago
7

Use the drop downs to complete the statements

Mathematics
1 answer:
ipn [44]3 years ago
6 0

Answer:

8

Step-by-step explanation:

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Please help click on the image below
Shtirlitz [24]
I believe that is c if I'm wrong I'm very sorry
6 0
3 years ago
You have been doing research for your statistics class on the prevalence of severe binge drinking among teens. You have decided
Serggg [28]

Answer:

(1.218 ; 1.322)

the confidence interval is appropriate

Step-by-step explanation:

The confidence interval :

Mean ± margin of error

Sample mean = 1.27

Sample standard deviation, s = 0.80

Sample size, n = 914

Since we are using tbe sample standard deviation, we use the T table ;

Margin of Error = Tcritical * s/√n

Tcritical at 95% ; df = 914 - 1 = 913

Tcritical(0.05, 913) = 1.96

Margin of Error = 1.96 * 0.80/√914 = 0.05186

Mean ± margin of error

1.27 ± 0.05186

Lower boundary = 1.27 - 0.05186 = 1.218

Upper boundary = 1.27 + 0.05186 = 1.322

(1.218 ; 1.322)

According to the central limit theorem, sample means will approach a normal distribution as the sample size increases. Hence, the confidence interval is valid, the sample size of 914 gave a critical value at 0.05 which is only marginally different from that will obtained using a normal distribution table. Hence, the confidence interval is appropriate

8 0
3 years ago
The frequency table shows the students' scores on a recent math test.what percentage of the students scored at least 81 on the t
Irina18 [472]

Answer:

54%

Step-by-step explanation:

total students are 50

20+7 scored at least 81 = 27

27/50=54%

8 0
3 years ago
Read 2 more answers
HELP ILL GIVE BRAINLIEST
Alex17521 [72]
Y=2x+2 easy
The slop=2/1
Y-int= (0,2)
7 0
2 years ago
What is the solution to the system shown?
Mice21 [21]

Answer:d

Step-by-step explanation:

16-4=12 and 16+4=20

5 0
2 years ago
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