They range from a retired school crossing guard to a teacher at the exclusive prep school attended by the mayor's son. Sixteen of the 18 said they had no opinion on whether race played a role in the prosecution. More than half said they have been directly affected by illegal drugs or alcoholism. And virtually all of them have been caught up in the publicity juggernaut surrounding the drug arrest of D.C. Mayor Marion Barry.

Yesterday, after two weeks of painstaking sifting through 250 prospective jurors, 18 District residents -- 13 blacks and five whites -- were chosen to sit in judgment on the legal matter entitled United States of America v. Marion S. Barry Jr.

When the final selections were over, U.S. District Judge Thomas Penfield Jackson's office released the jury questionnaires -- documents that provided the most detailed portrait yet of the citizens who will judge the mayor.

They are, for the most part, middle-aged: Nine of the 18 are between 35 and 50, with five younger than 35 and four older than 50. Black women predominate on the panel, making up 12 of the 18. Half the jurors reside in Northwest Washington; five live in Northeast and four live in Southeast.

On the most sensitive queries -- on the subject of drug abuse or alcoholism -- three of the 18 had their answers sealed from public view, but seven answered "yes" in some form.

"My brother had a drinking problem," answered one juror, a 61-year-old salesclerk. Said another, responding to the query on whether any relative had ever been a drug addict: "My sister, back in 1972."

A surprisingly high number of the jurors said they had no opinion on whether race played a role in the government's prosecution of the mayor. Two indicated "yes," 16 said they had no opinion.

The jurors are, in order of their seating:

Edward Eagles, 54, a white Northwest resident who teaches history at St. Albans School, the exclusive Northwest boys school where Barry's son, Christopher, has just completed the fourth grade, said he was aware of the charges against the mayor. He expressed reservations about undercover sting operations both in open court and on his questionnaire.

Carolyn Bass, a 49-year-old black woman who is a retired crossing guard and lives in Northeast, said at first that she had no knowledge of the publicity surrounding the Barry case, but she backtracked when questioned in court. "It was all over TV -- can't nobody get past that," she said. On her questionnaire, she indicated "no opinion" about the use of undercover stings, but when questioned she said, "People can do phony things {on tape}, you know."

Sheila Kern, a 41-year-old white who works as a governmental relations specialist for Motorola Inc., said she believed reports about the mayor's alleged drug use, she said, "as much as I believe anything in the media . . . with a grain of salt, yes."

Deborah Noel, a 34-year-old black clerk at Howard University Hospital, said she favored undercover operations "because it helps the police and the FBI catch criminals." Questioned by Barry's lawyer, R. Kenneth Mundy, she said that "the news media say a lot of things about Marion Barry . . . . I don't know whether he's guilty or not guilty."

Patricia Chaires, 39, a black program coordinator in postgraduate medical education at Howard University Hospital, said that she had heard of the charges against Barry, but had formed no opinion in the case. Her only problem with serving as a sequestered juror was that "I have two cats at home . . . "

Doris Gwendolyn Hawkins-Whitehead, a 48-year-old black employee of the D.C. government, was asked by Assistant U.S. Attorney Judith E. Retchin how she felt when she heard Barry had been indicted. "I felt saddened," she said. But she said she could find him guilty if warranted.

Joyce Lavern Hines, a 48-year-old black woman, told the court she was unemployed. She was outspoken about her distaste for undercover stings. "I think everything should be done out in the open," she said, but "if the court instructed me that it was a legal thing, I could" consider the evidence gained by such tactics.

Harriedell Jones, a 58-year-old black woman, is an accountant for the U.S. Department of Housing and Urban Development. She told the court that she believed race had something to do with the Barry prosecution. "I felt, and I think most blacks feel, that they're trying to get him out of office," she said.

Marsena Hall, a 22-year-old black employee of the D.C. public school system, said her cousin once was charged with drug possession. "I feel the mayor is innocent," she said in court, "but I do feel that if I had to, I could make a fair and impartial judgement."

Hilson Snow Jr., a 49-year-old black man who works for the U.S. Postal Service, answered crisply all questions put to him in court by Retchin. Has Barry been treated fairly? He would not know "until I see all the evidence." Is it ever permissible to lie under oath? "If you take an oath, you take an oath."

Anne Freeman, a 28-year-old white office manager for the Middendorf Gallery, said she had formed few opinions about the case, despite having read about it regularly in the newspaper.

Constance King, a black woman whose age was not available, works at St. Elizabeths Hospital and said her son once had been falsely accused of a crime. But she said she harbored no ill will against law enforcement.

Margaret Batson, a 70-year-old white woman, distrusted politicians, she said. But, she added, "everybody is innocent until proven guilty."

Joseph Deoudes, a 23-year-old white messenger service employee, said that he could "absolutely" presume innocence. He was questioned little by either side.

Marilyn Thomas, a 44-year-old black woman, works for the U.S. Holocaust Memorial. At first, she told the court that Barry had to prove his "innocence or guilt" to a jury. Told that the government bore the burden of proving him guilty, she replied, "I understand."

Tonna Norman, a black woman whose age and employment were unavailable, told the court that she harbored ill feelings toward Hazel Diane "Rasheeda" Moore, the former model who lured Barry to her room at the Vista Hotel Jan. 18 in the FBI undercover sting.

Johnnie Mae Hardeman, a 61-year-old black native of Tuskegee, Ala., made clear on the questionnaire that she was acquainted with racial prejudice. "I was brought up in the South, and I know what prejudice is."

Valerie Jackson-Warren, a 40-year-old black officer for the D.C. Department of Corrections, told the court she believed undercover operations were "a little sneaky." But, she said, if the operation were mounted in response to years of allegations of wrongdoing, she would put her feelings aside.