I need help with this it’s 9th grade algebra and I don’t know how to solve this one and I need the variables in it

Mathematics

1 answer:

kicyunya [14]3 years ago

5 0

Answer:

can't see

Step-by-step explanation:

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You perform 7000 significance tests using a significance level of 3%. Assuming that the null hypothesis is true, how many of the

mr Goodwill [35]

Answer:

210

Step-by-step explanation:

we have given significance level α=3% =0.03

level of significance is nothing but the chances of rejecting a null hypothesis by the test when it given that it is correct. it is denoted by α it also defined as the

level of significance =1 - confidence level

now statistically significant test =0.03×7000=210

so the expected value of statistical significant is 210

4 0

4 years ago

The Community College Survey of Student Engagement reports that 46% of the students surveyed rarely or never use peer or other t

kap26 [50]

Answer:

d) No, this would not be unusual because 46% is only 1.2 standard errors from 40%.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

If the z-score is higher than 2 or lower than -2, X is unusual.

In this question:

Mean = 40%. So $\mu = 0.4$