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A sociologist wants to know the opinions of employed adult women about government funding for day care. She obtains a list of 520 members of a local business and professional women’s club and mails a questionnaire to 100 of these women selected at random. 68 questionnaires are returned. What is the population in this study?
A
The next two questions refer to the following: An article from The San Jose Mercury News was concerned with the racial mix of the 1500 students at Prospect High School in Saratoga, CA. The table summarizes the results. (Male and female values are approximate.)
Ethnic Group | |||||
---|---|---|---|---|---|
Gender | White | Asian | Hispanic | Black | American Indian |
Male | 400 | 168 | 115 | 35 | 16 |
Female | 440 | 132 | 140 | 40 | 14 |
Find the probability that a student is Asian or Male.
0.5773
Find the probability that a student is Black given that the student is Female.
0.0522
A sample of pounds lost, in a certain month, by individual members of a weight reducing clinic produced the following statistics:
The correct statement is:
B
What does it mean when a data set has a standard deviation equal to zero?
C
The statement that best describes the illustration below is:
C
A “friend” offers you the following “deal.” For a $10 fee, you may pick an envelope from a box containing 100 seemingly identical envelopes. However, each envelope contains a coupon for a free gift.
Based upon the financial gain or loss over the long run, should you play the game?
B
The next four questions refer to the following: Recently, a nurse commented that when a patient calls the medical advice line claiming to have the flu , the chance that he/she truly has the flu (and not just a nasty cold) is only about 4%. Of the next 25 patients calling in claiming to have the flu , we are interested in how many actually have the flu .
Define the Random Variable and list its possible values.
$X$ = the number of patients calling in claiming to have the flu , who actually have the flu . $X$ = 0, 1, 2, ...25
State the distribution of $X$ .
$B(\text{25},0\text{.}\text{04})$
Find the probability that at least 4 of the 25 patients actually have the flu .
0.0165
On average, for every 25 patients calling in, how many do you expect to have the flu ?
1
The next two questions refer to the following: Different types of writing can sometimes be distinguished by the number of letters in the words used. A student interested in this fact wants to study the number of letters of words used by Tom Clancy in his novels. She opens a Clancy novel at random and records the number of letters of the first 250 words on the page.
What kind of data was collected?
C
What is the population under study?
All words used by Tom Clancy in his novels
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