STATS110

The price of gold was $1061 per ounce on Dec. 31 and has risen 14.78% since that time. What is the price per ounce now? A. $1218 B. $156.82 C. $1076 D. $62

A. $1218

Here is the data set 14, 8, 10, 7, 6. Find the mean A. 9 B. 8 C. 14 D. 45 E. 6

A. 9

To illustrate a talk you are giving, you want to make a graph to compare the consumption (in gallons) of alcohol per person for several countries. For example, this is 2.87 gallons per person in France and 1.74 gallons per person in the United States. You should make a A. Bar graph B. Histogram C. Line Graph D. Pie Chart

A. Bar graph

What does "seasonal adjustment" mean? A. Data are seasonally adjusted if we take out changes that occur in about the same size and same time every year B. Data are seasonally adjusted when we ignore the effects of one-time events such as strikes and hurricanes C. Data are seasonally adjusted if we report the average for this month over several past years, not just this one month's data D. Data are seasonally adjusted if we report the average for the past four months, not just this one month's data

A. Data are seasonally adjusted if we take out changes that occur in about the same size and same time every year

What percentile is scooter's heart rate (found in table) A. 4.46 B. 72.58 C. 27.42 D. 99.74 E. 99.81

B. 72.81

A study in which information about individual subjects are never made public is said to be A. Anonymous B. Confidential C. Unbiased D. Replicated

B. Confidential

It is hard to measure "intelligence." To do it the easy way, one can measure the circumference of the head, just above the ears, in inches, and call the result "intelligence". Not only is this method easy, it gives nearly the same number every time every time one repeats the measurement on the same person. Measuring intelligence this way is: A. Not reliable/valid B. Highly reliable but not valid C. Valid but not reliable D. Both valid and highly reliable

B. Highly reliable but not valid

Josh is enrolling human participants in a study that will test whether drivers stop more quickly for men or women in a crosswalk when the pedestrian is disobeying the crossing signal. Because no one would sign up for the study if he were to tell them of its dangerous nature, he adversities it as a "study involving a walk outside." What principle of research is Josh violating. A. Anonymity B. Informed consent C. Confidentiality D. Placebo control

B. Informed consent

An office worker sets her coffee maker to start brewing 5:30 AM. On some mornings it starts five minutes early, on some it starts ten minutes early. It's always early but there is no telling when the coffee will start or finish. The time on the coffee maker is A. Biased B. Invalid C. Imprecise D. A sampling error

B. Invalid

In order to be correct, a line graph of the number of suicides per year in the United States must have A. Number of suicides in the horizontal scale B. Years on the horizontal scale C. Either suicides or years on the horizontal scale, as long as the intervals are equal D. Bars of equal width

B. Years on the horizontal scale

In the last half of 2015, the price of Apple, INC. common stock dropped from $126.60 per share to $105.26 per share. What percentage decrease is this? A. 0.1686% B. 0.2027% C. 16.86% D. 20.27%

C

Here is the data set 14, 8, 10, 7, 6 Find the standard deviation A. 9 B. 8 C. 3.16 D. 2.83 E. 6

C. 3.16

Approximately what percentage of the containers had fewer than 105 spears? A. -50 B. 50 C. 30.85 D. 69.15 E. -30.85

C. 30.85

Professor Duffy wishes to study the relationship between people's zodiac sign and their political opinions. She asks the students filling out her questionnaire to put their names on the front so she can ask for clarification of some answers later. However, she promises that no one other than she will find out who gave her what answer. Prof. Duffy is promising A. anonymous and confidential B. Confidential C. Confidential but not necessarily anonymous D. Neither

C. Confidential but not necessarily anonymous

You want to make a graph to show how the cost of attending your school has increased since 1980. A good choice of graph is A. Bar B. Histogram C. Line graph D. Pie chart E. Stemplot

C. Line graph

John developed a new test of spiritual awareness for his course on religions of the world. Any such test must have several versions because some people take the test more than once. Unfortunately, it turns out the same person often gets very different scores, depending on which version of the test is offered, even when taking the versions at nearly the same time. The test suffers from: A. Large bias B. Confounding C. Large sampling errors D. Low reliability

D. Low reliability

Suppose that the distribution of heart rates for medium sized dogs is normally distributed with mean 115 beats per minute and standard deviation of 18 beats per minute. Imani takes her medium sized dog to the vet for a wellness check and learns that scooters heart rate is 128 beats/minute What is the approximate standard score for scooter's heart rate? A. 241 B. 11 C. 18 D. -.6 E. .6

E. .6

From 2010 to 2015, the average annual profit for Acme Floormart Company has increased from $1.5 million to $10 million A. This is an increase of 8.5% B. This is an increase of 85% C. This is an increase of 850% D. This is an increase 56.7% E. This is an increase of 567%

E. 567%

The distribution of the number of dill pickle spears in a gallon container is approximately normal with mean 110 and standard deviation 10 Approximately what percent of containers had between 90 and 130 spears A. 27 B. 58 C. 68 D. 73 E. 95

E. 95%

7 members of a fraternity take a statistics course. Here are their scores on the first exam in the course: 61 74 47 60 62 63 75 To present the distribution of scores in a graph, you might choose a A. Bar graph B. Histogram C. Line graph D. Pie chart E. Stemplot

E. Stemplot

Use this histogram to answer the question The overall shape of the histogram is

Skewed right

find the 3rd quartile a. 62.5 b. 46.5 c. 52.5 d. 45 e. 50

a. 62.5

Find the first quartile 33, 45, 65, 50, 65, 48, 60, 55 a. 62.5 b. 46.5 c. 52.5 d. 45 e. 50

b. 46.5

How many dill pickle spears does a container hold if its standardized score is 0.4? a. 4 b. 14 c. 104 d. 114 e. we don't have enough info

d. 114