One of the key differences between a bar chart and histogram is:
A) the histogram contains gaps between the bars and the bar chart does not.
B) a bar chart is used to display a categorical variable and a histogram is used to display the distribution of a quantitative variable.
C) the histogram shows relative frequency while the bar chart shows frequency.
D) the bar chart must be vertical while the histogram must be horizontal.
Q. 2If a hypothesis test is conducted for a population mean, a null and alternative hypothesis of the form: H0 : = 100HA : 100will result in a one-tailed hypothesis test since the sample result can fall in only one tail.
Indicate whether the statement is true or false
Q. 3The within sample variation is the dispersion that exists because the sample means for the various factor levels are not all equal.
Indicate whether the statement is true or false
Q. 4A study was recently conducted by the regional electric and gas company. Data were collected for three customer categories showing the dollar amount of natural gas and the dollar amount of electricity consumed during the year.
Which of the following graphs would most likely be used to display both sets of data together?A) Pie chart
B) Bar chart
C) Line chart
D) Histogram
Q. 5If the monthly electrical utility bills of all customers for the Far East Power and Light Company are known to be distributed as a normal distribution
with mean equal to 87.00 a month and standard deviation of 36.00, which of the following would be the largest individual customer bill that you might expect to find?
A) Approximately 811.00
B) About 195.00
C) Nearly 123.00
D) There is no way to determine this without more information.
Quick Reply
