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Examen

Sophia Introduction to Statistics Unit 5 Milestone 5,
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23

octubre 2023

2023/2024

A+
If we first note the denominator of Then, getting the z-score we can note it is This tells us that 36.1 is 2.83 standard deviations above the value of 36. Note that when you round some values you may get slightly different results, but the results should be relatively close to this final calculated value. CONCEPT Z-Test for Population Means 2 Emile has calculated a one-tailed z-statistic of -1.97 and wants to see if it is significant at the 5% significance level. What is the critical v...
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Examen

Sophia Introduction to Statistics Unit 5 Milestone 5....
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23

octubre 2023

2023/2024

A+
If we go to the chart and the row for the z-column for -1.5 and then the column 0, this value corresponds to 0.0668 or 0.067. CONCEPT How to Find a P-Value from a Z-Test Statistic 3 Sukie interviewed 125 employees at her company and discovered that 21 of them planned to take an extended vacation next year. What is the standard error of the sample proportion? Answer choices are rounded to the thousandths place. 0.080 0.015 0.532 0.033 RATIONALE We can note the SE of the proportion i...
kimanichelsea20
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Examen

Sophia Introduction to Statistics Unit 5 Milestone 5..
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22

octubre 2023

2023/2024

A+
RATIONALE Using the z-chart to construct an 88% CI, this means that there is 6% for each tail. The lower tail would be at 0.06 and the upper tail would be at (1 - 0.06) or 0.94. The closest to 0.94 on the z-table is between 0.9394 and 0.9406. 7/2/2020 Sophia :: Welcome 0.9394 corresponds with a z-score of 1.55. 0.9406 corresponds with a z-score of 1.56. Taking the average of these two scores, we get a z-score of 1.555. CONCEPT Confidence Intervals 3 A market research company conducted...
kimanichelsea20
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Examen

Sophia Introduction to Statistics Unit 5 Milestone 5
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-

22

octubre 2023

2023/2024

A+
Recall that we have n = 7, so the df = n-1 = 6. So if we go to the row where df = 7 and then 0.025 for the tail probability, this gives us a value of 2.447 or 2.45. Recall that a 95% confidence interval would have 5% for the tails, so 2.5% for each tail. We can also use the last row and find the corresponding confidence level (see 95%). CONCEPT How to Find a Critical T Value 5 A market research company conducted a survey of two groups of students from different schools. They found that s...
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