Answer:
<u>The proportion of the scores that are on the right side of the line is 0.0668</u>
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly:
µ of a normal distribution = 40
σ of a normal distribution = 10
X = 55
2. What proportion of the scores are on the right side of the line?
Let's calculate the z-score for X = 55, this way:
z-score = (X - µ)/σ
z-score = (55 - 40)/10
z-score = 1.5
Now, using the z-table, let's calculate the proportion, this way:
p (z = 1.5) = 0.9332
In consequence,
p (z > 1.5) = 1 - 0.9332 = 0.0668
Answer:
Sedimentary rocks are formed from pieces of other existing rock or organic material. There are three different types of sedimentary rocks: clastic, organic , and chemical. Clastic sedimentary rocks, like sandstone, form from clasts, or pieces of other rock.
Hope this helps
Answer:
1) The correct z* to to construct a 92% confidence interval is 1.75
2) these results are not good evidence that the new curriculum has improved Math SAT scores.
3) the results are not statistically significant at level α = 0.05, but they are practically significant.
Step-by-step explanation:
1) z-score for 92% confidence level is ≈ 1.75
2) P-value for testing whether the mean score in senator's state is more than the national average of 480 is less than 0.0001 means that
the probability that the sample is drawn from the population where senator's state is more than the national average of 480 is <0.0001.
Thus we have to reject this hypothesis since the probability is too small.
3) if we calculate the statistic of the sample we get (560-480)/100=0.8 where
- 560 is the mean score of trained 4 students
- 480 is the mean math sat score of this year
- 100 is the standard deviation of the test.
Since t-critical at 0.05 significance for 3 degrees of freedom ≈ 2.35 is bigger than 0.8, the result is not significant statistically.
But 80 points higher than the national average is a practically significant result since its <em>effect size</em> is large.
Answer:
<em><u>SEE</u></em><em><u> </u></em><em><u>THE</u></em><em><u> </u></em><em><u>IMAGE</u></em><em><u> </u></em><em><u>FOR</u></em><em><u> </u></em><em><u>ALL</u></em><em><u> </u></em><em><u>ANSWERS</u></em><em><u>.</u></em>