Reference no: EM137668
Q. Which of the following measures are not affected by outliers? A. The mean B. The standard deviation C. The IQR
Q. Does the value of the standard deviation depend on the value of the mean?
A. Yes. If the mean gets larger the standard deviation will also get larger.
B. Yes. You need to know the mean to be able to calculate the standard deviation.
C. No. The center of a distribution and the spread are not related.
Q. A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is
A. quantitative.
B. categorical.
C. Neither categorical nor quantitative.
Q. An eager statistics student wanted to help his boss. He studied the data on products sold at the store over a period of a week and reported to his boss that the average UPC number was 1001264789 with a standard deviation of 45378. From this information his boss should
A. make sure there are lots of 1001264789 items on hand.
B. know that approximately 68% of all items had UPC codes between 1001219411 and 1001310167.
C. do nothing with the information. The statistics reported are invalid.
Q. The most common intelligence quotient (IQ) scale is Normally distributed with mean 100 and standard deviation 15. Many school districts across the country seek to identify "Gifted and Talented" children for special enrichment programs. Typically, these children must have IQ scores in the top 5%. What is the minimum score to qualify a child for these programs?
A. 130 B. 125 C. 115
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Graphically represent the relationship
: A major study examined the relationship between cause of death (heart attack, cancer, stroke, accident, etc.) and age. A good way to graphically represent the relationship is with
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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?
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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..
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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
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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
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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.
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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..
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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?
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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
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