For each of the questions below, a histogram is described. Indicate in each case
ID: 3252295 • Letter: F
Question
For each of the questions below, a histogram is described. Indicate in each case whether you think the histogram should look like approximately a bell-shaped (normal) curve, and give a brief explanation why (one sentence is probably sufficient). There are no data for these questions, so you will not need to use the computer to answer these questions.
Two hundred students in a statistics class each flip a coin 40 times and record the number of heads. The numbers of heads are plotted in a histogram.
Two hundred students in a statistics each roll a die 40 times and record the sum of the numbers they got on the 40 rolls. They make a histogram of the 200 sums.
One hundred CEOs report their annual salaries, and these salaries are plotted in a histogram.
A police department in a small city keeps track of the number of murders in the city each day for a year and records the 365 values in a histogram.
The day before an election, fifty different polling organizations each sample 1000 people and record the percentage who say they will vote for the Democratic candidate. The 50 values are plotted in a histogram.
The fifty polling organizations also record the average age of the 1000 people in their sample, and the 50 averages are plotted in a histogram.
Explanation / Answer
Two hundred students in a statistics class each flip a coin 40 times and record the number of heads. The numbers of heads are plotted in a histogram. -This Histogram approximately looks like a bell-shaped normal curve. since the chances of falling the number of heads either side of 100 is equal . so it looks like bell-shape curve. Two hundred students in a statistics each roll a die 40 times and record the sum of the numbers they got on the 40 rolls. They make a histogram of the 200 sums- This Histogram approximately looks like a bell-shaped normal curve, and the maximum value of curve is at the mean of sums. One hundred CEOs report their annual salaries, and these salaries are plotted in a histogram. - This is also a bell shaped histogram because maximum number of CEOs get the average equal salaries, and the mean of slaries is equal and continuous A police department in a small city keeps track of the number of murders in the city each day for a year and records the 365 values in a histogram. - this also shows bell shaped curve The day before an election, fifty different polling organizations each sample 1000 people and record the percentage who say they will vote for the Democratic candidate. The 50 values are plotted in a histogram. -The histogram may be right skewed or left skewed, because it is not necessary that choices of people for all cadidates are equally distributed. The fifty polling organizations also record the average age of the 1000 people in their sample, and the 50 averages are plotted in a histogram.- this also represents the bell shaped histogram, since the chances of falling the age either side of the mean is equal and continuous.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.