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hayleeirene
Username
hayleeirene
Score
59
Membership
Stats
Questions
11
Answers
0
17 Questions
0 Answers
0
968
0
+59
One hundred sixty-five of the 205 members surveyed at a local gym say they worked out more often when they were
One hundred sixty-five of the 205 members surveyed at a local gym say they worked out more often when they were in their twenties than they did when they were teenagers. Calculate the margin of error (ME), rounded to the nearest tenth of a percent. Is it
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hayleeirene
May 15, 2018
0
1062
0
+59
A researcher conducted a survey of 500 voting adults at a particular
A researcher conducted a survey of 500 voting adults at a particular party fund-raiser to estimate the average amount of money electorates contribute to candidates of their choice each election cycle. The data is normally distributed, with the highest amount
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hayleeirene
May 15, 2018
0
1081
1
+59
A stock market analyst observes the following for the price of two stocks that
A stock market analyst observes the following for the price of two stocks that he owns, one of which is growing in a linear fashion (arithmetic) and the other of which is growing at an exponential rate (geometric).
Stock A: Equation: an = 25n + 60, where
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hayleeirene
May 14, 2018
0
732
0
+59
A stock market analyst observes the following for the price of two stocks that he owns
A stock market analyst observes the following for the price of two stocks that he owns, one of which is growing in a linear fashion (arithmetic) and the other of which is growing at an exponential rate (geometric).
Stock A: Equation: an = 25n + 60, where
read more ..
hayleeirene
May 14, 2018
+1
1347
1
+59
Suppose you drop a ball from a window 15 meters above the ground. The ball bounces to 60% of its previous height with each bounce.
Suppose you drop a ball from a window 15 meters above the ground. The ball bounces to 60% of its previous height with each bounce. What is the total number of meters (rounded to the nearest tenth) the ball travels between the time it is dropped and the
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hayleeirene
May 14, 2018
0
1262
1
+59
A triangle has vertices P(−2, 5), Q(−2, −3), and R(4, −3). S is the midpoint of PQ and T is the midpoint of QR.
A triangle has vertices P(−2, 5), Q(−2, −3), and R(4, −3). S is the midpoint of PQ and T is the midpoint of QR. What is the length of ST?
st=5
st=4
st=3 squareroot 2
st= 6 squareroot 2
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hayleeirene
May 14, 2018
-1
954
0
+59
A scientist has a hypothesis that as light decreases, the proportion of cars speeding decreases.
A scientist has a hypothesis that as light decreases, the proportion of cars speeding decreases. He finds that at light level X1 (a bright day), the proportion of cars speeding is p=0.69 . At light level X2 (at dusk), the proportion of cars speeding is
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hayleeirene
May 1, 2018
-1
965
0
+59
When conducting a sample survey, it is important to craft the survey question
When conducting a sample survey, it is important to craft the survey question, indicate the sample size and type, and determine the randomizing process. Which additional step is also crucial to the success of the survey?
Collect the data
Make
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hayleeirene
May 1, 2018
-2
1266
6
+59
HELP PLEASE i need to finish this test by today to be able to graduate )):
A researcher is interested in determining whether a new drug lowers blood pressure more than a leading drug. The average systolic blood pressure was analyzed for 10 people using the drugs. The mean systolic blood pressure of the people using the new drug
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hayleeirene
Apr 30, 2018
0
1339
1
+59
On any particular Saturday evening, the probability that Jenna will go to the movies and go for coffee is 1/2.
On any particular Saturday evening, the probability that Jenna will go to the movies and go for coffee is 1/2. The probability that she will go to the movies, given that she has gone for coffee, is 3/7. What is the probability that Jenna will go for coffee
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hayleeirene
Apr 28, 2018
-1
1860
1
+59
A manufacturer produces soda cans and a quality control worker randomly selects two cans from the assembly line for testing.
A manufacturer produces soda cans and a quality control worker randomly selects two cans from the assembly line for testing. Past statistics show that 10% of the cans are defective. What is the probability that the two selected cans are defective if the
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hayleeirene
Apr 28, 2018
-1
749
0
+59
Consider two events such that P(A) =3/5 , P(B) = 2/3 , and P(A ∩ B) = 1/5. Are events A and B independent events?
Consider two events such that P(A) =3/5 , P(B) = 2/3 , and P(A ∩ B) = 1/5. Are events A and B independent events?
Yes, they are independent because P(A) ⋅ P(B) = P(A ∩ B)
No, they are dependent because P(A) ⋅ P(B) ≠ P(A ∩ B)
Yes,
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hayleeirene
Apr 28, 2018
-1
1840
1
+59
In a city school of 1,200 students, 30% of the students are on the honor roll
In a city school of 1,200 students, 30% of the students are on the honor roll, 62% have a part-time job, and 24% are on the honor roll and have a part-time job. What is the probability (rounded to the nearest whole percent) that a randomly selected student
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hayleeirene
Apr 28, 2018
-1
918
0
+59
One hundred ninety-one of the 288 high school students surveyed
One hundred ninety-one of the 288 high school students surveyed at a local school say they went outside more during school hours as elementary school students than they do now as high school students. Calculate the margin of error (ME), rounded to the nearest
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hayleeirene
Apr 26, 2018
-1
788
0
+59
Two cards are drawn without replacement from a standard deck of 52 cards.
Two cards are drawn without replacement from a standard deck of 52 cards. What is the probability that one of the cards is red and the other is black, and are these events independent?
26/51; no, they are dependent events
13/51; no, they
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hayleeirene
Apr 26, 2018
-1
2637
1
+59
Consider two events such that P(A) = , P(B) = , and P(A ∩ B) =
Consider two events such that P(A) = 1/4 , P(B) = 2/3 , and P(A ∩ B) = 1/5 . Are events A and B independent events?
Yes, they are independent because P(A) ⋅ P(B) = P(A ∩ B)
No, they are dependent because P(A) ⋅ P(B)
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hayleeirene
Apr 26, 2018
-1
1474
1
+59
At an amusement park, the probability that a child eats a hot dog and drinks
At an amusement park, the probability that a child eats a hot dog and drinks a soda pop is 0.38. The probability that a child eats a hot dog is 0.61, and the probability that a child drinks soda pop is 0.89. What is the probability (rounded to the nearest
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hayleeirene
Apr 26, 2018
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