Reference no: EM137667
Q. The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution with a mean of 516 hours and a standard deviation of 20 hours. 90% of all batteries have a lifetime less than
A. 517.28 hours. B. 536.00 hours. C. 541.60 hours.
Q. The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520 hours is approximately.
A. 0.2000. B. 0.5793. C. 0.4207.
Q. When ordering vinyl replacement windows, the following variables are specified for each window. Which of these variables is quantitative?
A. Window style - Double hung, casement, or awning
B. Area of the window opening in square inches
C. Window style - Single pane or double pane
Q. You receive a fax with six bids (in millions of dollars) 2.2, 1.3, 1.9, 1.2, 2.4, and x,
where x is some number that is too blurry to read. Without knowing what x is, the median
A. is 1.9. B. must be between 1.3 and 2.2. C. could be any number between 1.2 and 2.4.
Q. A distribution has a mean of 100 and a median of 120. The shape of this distribution is most likely
A. skewed left. B. skewed right. C. symmetric.
|
Find the height of the density curve
: A random variable has the density curve as in the graph below. Find The height of the density curve?
|
|
The results are displayed in the graph
: High levels of glucose in the blood are indications of diabetes, which is becoming more prevalent in the United States. Diabetes can lead to many complications such as blindness and heart disease. A random sample of 180 individuals had their blood su..
|
|
Find relatively higher cholesterol
: A teacher gave a 25 question multiple choice test. After scoring the tests, she computed a mean and standard deviation of the scores. The standard deviation was 0. Based on this information
|
|
What is the minimum score
: A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is
|
|
Find the shape of this distribution
: The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520 hours is approximately.
|
|
Two histograms represent the distribution of acceptance rate
: The accompanying two histograms represent the distribution of acceptance rates (percent accepted) among 25 business schools in 1995. The histograms use different class intervals, but are based on the same data. In each class interval, the left endpoi..
|
|
Density curve displayed
: the maximum point total for the quarter was 200. The point totals for the 10 students are given in the stemplot below. For the density curve displayed below, which of the following is true?
|
|
Time plot of the values of variable
: Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
|
|
Find the interquartile range of the salaries
: Suppose each employee in the company receives a $3000 raise for next year (each employee's salary is increased by $3000). The interquartile range of the salaries will
|