MA Chapter 2
According to the Empirical Rule, for data having a bell-shaped distribution
approximately what percent of the data falls within 2 standard deviations of the mean? -
answer95%
What is(are) the Mode(s) for this set of data points? 35 42 65 42 22 - answer42
In a survey of patients in a local hospital, 62.42% of the respondents indicated that the
health care providers needed to spend more time with each patient. In this survey, the
sample is all survey respondents. - answer True
The Quick Analysis button is a feature available in Excel that gives you - answer
shortcuts for Conditional Formatting, adding Data Bars, and other operations.
To ___________ a table means to arrange all of the data in a specific order. -
answerSort
The College Board originally scaled SAT scores so that the scores for each section
were approximately normally distributed with a mean of 500 and a standard deviation of
100. Assuming SAT scores follow a bell-shaped distribution; use the empirical rule to
find the percent of students who scored more than 600.
Feedback: Correct. The z-score for this situation is (700 - 600) / 100 = 1. Recall that
68% of observations will fall within 1 standard deviation of mean. This means that 16%
of observations will fall above 1 standard deviation and 16% of observations will fall
below 1 standard deviation. This question asks for the percent of students who scored
more than 600 (above 1 standard deviation). The correct answer is 16%. - answer16%
The College Board reported that in 2014, the mean Math Level 2 SAT subject test score
was 686 with a standard deviation of 96. Assuming scores follow a bell-shaped
distribution; use the empirical rule to find the percent of students who scored less than
494.
Feedback: Incorrect. The z-score for this situation is (494 - 686) / 96 = -2. Recall that
95% of observations will fall within 2 standard deviations of mean. This means that
2.5% of observations will fall above 2 standard deviations and 2.5% of observations will
fall below 2 standard deviations. This question asks for the percent of students who
scored less than 494 (below 2 standard deviations). The correct answer is 2.5%. -
answer2.5%
According to the Empirical Rule, for data having a bell-shaped distribution
approximately what percent of the data falls within 2 standard deviations of the mean? -
answer95%
What is(are) the Mode(s) for this set of data points? 35 42 65 42 22 - answer42
In a survey of patients in a local hospital, 62.42% of the respondents indicated that the
health care providers needed to spend more time with each patient. In this survey, the
sample is all survey respondents. - answer True
The Quick Analysis button is a feature available in Excel that gives you - answer
shortcuts for Conditional Formatting, adding Data Bars, and other operations.
To ___________ a table means to arrange all of the data in a specific order. -
answerSort
The College Board originally scaled SAT scores so that the scores for each section
were approximately normally distributed with a mean of 500 and a standard deviation of
100. Assuming SAT scores follow a bell-shaped distribution; use the empirical rule to
find the percent of students who scored more than 600.
Feedback: Correct. The z-score for this situation is (700 - 600) / 100 = 1. Recall that
68% of observations will fall within 1 standard deviation of mean. This means that 16%
of observations will fall above 1 standard deviation and 16% of observations will fall
below 1 standard deviation. This question asks for the percent of students who scored
more than 600 (above 1 standard deviation). The correct answer is 16%. - answer16%
The College Board reported that in 2014, the mean Math Level 2 SAT subject test score
was 686 with a standard deviation of 96. Assuming scores follow a bell-shaped
distribution; use the empirical rule to find the percent of students who scored less than
494.
Feedback: Incorrect. The z-score for this situation is (494 - 686) / 96 = -2. Recall that
95% of observations will fall within 2 standard deviations of mean. This means that
2.5% of observations will fall above 2 standard deviations and 2.5% of observations will
fall below 2 standard deviations. This question asks for the percent of students who
scored less than 494 (below 2 standard deviations). The correct answer is 2.5%. -
answer2.5%
