Intro to stats - Study guides, Class notes & Summaries
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Sophia __ Intro to Stats Unit 5 Milestone 5 graded A questions and answers
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Using the z-chart to construct a 97% CI, this means that there is 
1.5% for each tail. The lower tail would be at 0.015 and the upper tail would be at (1 - 0.015) or 0.985. The 
value of 0.9850 is actually on the z-table exactly. 
0.9850 corresponds with a z-score of 2.17
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Sophia Intro to Stats Unit 4 Milestone 4
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For ten students, a teacher records the following scores of two assessments, Quiz 1 and Test. 
 
Quiz 1 (x) Test (y) 
15 20 
12 15 
10 12 
14 18 
10 10 
8 13 
6 12 
15 10 
16 18 
13 15 
Mean 11.9 14.3 
Standard Deviation 3.3 3.5 
The correlation of Quiz 1 and Test is 0.568. 
Given the information below, what is the slope and y-intercept for the least-squares line of the Quiz 1 scores and Test scores? Answer choices are rounded to the 
hundredths place. 
 
Slope = 0.54 
y-intercept = 1.71 
 
Slop...
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Intro to Stats MCCC Ch. 5 question and and answers graded A+ 2023
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Intro to Stats MCCC Ch. 5
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Intro to Stats MCCC Ch. 5 question and answers 2023
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Intro to Stats MCCC Ch. 5
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Sophia Intro to Stats Unit 5 Milestone 5,
- Exam (elaborations) • 23 pages • 2023
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RATIONALE 
Using the z-chart to construct a 97% CI, this means that there is 
1.5% for each tail. The lower tail would be at 0.015 and the upper tail would be at (1 - 0.015) or 0.985. The 
value of 0.9850 is actually on the z-table exactly. 
0.9850 corresponds with a z-score of 2.17. 
CONCEPT 
Confidence Intervals 
2 
George measured the weight of a random sample of 49 cartons of apples. The mean weight was 45.5 pounds, 
with a standard deviation of 3. 
 
To see if the cartons have a significant...
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Sophia Intro to Stats Unit 2 Milestone 2,
- Exam (elaborations) • 20 pages • 2023
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In which of these cases should the median be used? 
 
When the data has small variance 
 
When data has no outliers 
 
When the data has extreme values 
 
When the data has nominal values 
RATIONALE 
Since the mean uses the actual values in the data, it is most affected by outliers and skewness. So, we only want to use the mean when the data is symmetric as a measure 
of centrality. When the data is skewed or has extreme values, 
the median is a better measure since it is not as sensitive to the...
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Sophia Intro to Stats Unit 2 Milestone 2.
- Exam (elaborations) • 20 pages • 2023
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In which of these cases should the median be used? 
 
When the data has small variance 
 
When data has no outliers 
 
When the data has extreme values 
 
When the data has nominal values 
RATIONALE 
Since the mean uses the actual values in the data, it is most affected by outliers and skewness. So, we only want to use the mean when the data is symmetric as a measure 
of centrality. When the data is skewed or has extreme values, 
the median is a better measure since it is not as sensitive to the...
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Intro to Stats MCCC Exam Questions with Correct Answers
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Intro to Stats MCCC Exam 
Questions with Correct 
Answers 
 
If A denotes some event, what does (complement of A) denote? If P(A)=0.003, what is 
the value of P(complement of A)? If P(A)=0.003, is (complement of A) unusual? 
a. What does (complement of A) denote? 
b. If P(A)=0.003, what is the value of P(complement of A)? 
c. If P(A)=0.003, is (complement of A) unusual? - Answer-a. Event (complement of A) 
denotes the complement of event A, meaning that (complement of A) consists of all 
outcome...
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Sophia Intro to Stats Unit 3 Milestone 3
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Which of the following is a property of binomial distributions? 
 
All of the observations made are dependent of each other. 
 
There are exactly four possible outcomes for each trial. 
 
The expected value is equal to the number of successes in the experiment. 
 
The variable of interest is the total number of successes or failures for a given number of observations. 
RATIONALE 
Recall that for the binomial distribution we are concerned with an event occurring (successes) or not occurring (fail...
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Sophia Intro to Stats Unit 1 Milestone 1
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A hunter is practicing his aim using a practice target. He takes 5 shots. All 5 shots hit the target, but they do not hit or surround the bullseye. In addition, all 5 shots are 
very spread apart on the target. 
Classify the hunter's accuracy and precision. 
 
Low accuracy and low precision 
 
High accuracy and low precision 
 
Low accuracy and high precision 
 
High accuracy and high precision 
RATIONALE 
Since the arrows fall away from the bullseye and are spread out we would classify this as...
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