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3 years ago

3×1 3/4 greater than less than or equal to 1 3/4

Mathematics

1 answer:

bagirrra123 [75]3 years ago

7 0

3•1 3/4 is Greater than 1 3/4

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3 years ago

What is 505/100 as a decimal?

Marina86 [1]

It is 5.05.

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4 years ago

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4 years ago

Math help please ?? functions?

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the function y = 3 ( ½)^3

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3 years ago

Two hundred undergraduate students were randomly selected from a university that has 47,000 students in total. Systolic blood pr

Hoochie [10]

Answer:

The correct option is d

Step-by-step explanation:

From the question we are told that

The population size is $N = 47000$

The sample size is $n = 200$

The sample mean is $\= x = 118.0 \ mmHg$

The standard deviation is $\sigma = 11.0 \ mmHg$

Given that the confidence level is 95% then the level of significance can be calculated as

$\alpha = 100 - 95$

$\alpha = 5 \%$

$\alpha = 0.05$

Next we obtain the critical value of $\frac{\alpha }{2}$ from z-table , the value is $Z_{\frac{\alpha }{2} } = Z_{\frac{0.05 }{2} } = 1.96$

The reason we are obtaining critical value of $\frac{\alpha }{2}$ instead of $\alpha$ is because

$\alpha$ represents the area under the normal curve where the confidence level interval ( $1-\alpha$ ) did not cover which include both the left and right tail while