A basketball player shoots 8 free throws during a game.
The sample space for counting the number she
makes is - ✔️✔️{0, 1, 2, 3, 4, 5, 6, 7, 8}.
A candidate for mayor of Dallas wants to know what
proportion of city residents support his candidacy. His
staff calls 1,000 people chosen at random from the city
telephone directory and 850 of them respond. What
are the population and the sample in this example? - ✔
️✔️Population: all Dallas residents. Sample: the 850
people who respond
A company produces packets of soap powder that are
labeled "Giant Size 32 Ounces." The actual weight of
,soap powder in a box has a Normal distribution with a
mean of 33 oz. and a standard deviation of 0.7 ounces.
95% of packets actually contain more than x ounces of
soap powder. What is x? - ✔️✔️31.85
A farmer wishes to determine which of two brands of
baby pig pellets, Kent or Moormans, produces better
weight gains. Two of his sows each give birth to litters
of 10 pigs on the same day, so he decides to give the
baby pigs in litter A only Kent pellets, while the pigs in
litter B will get only Moormans pellets. After four
weeks, the average weight gain for pigs in litter A is
greater than the average weight gain for pigs in litter B.
The feed they get is not the only factor affecting the
rate at which pigs gain weight. Genetic differences also
affect weight gain. It is likely that the pigs in litter A are
genetically different from the pigs in litter B,
,because the two litters have different mothers. Because
the farmer is only interested in determining which
brand of pellets is better, the study suffers from - ✔️✔
️onfounding
A farmer wishes to determine which of two brands of
baby pig pellets, Kent or Moormans, produces better
weight gains. Two of his sows each give birth to litters
of 10 pigs on the same day, so he decides to give the
baby pigs in litter A only Kent pellets, while the pigs in
litter B will get only Moormans pellets. After four
weeks, the average weight gain for pigs in litter A is
greater than the average weight gain for pigs in litter B.
The weight of the pigs after four weeks is - ✔️✔️the
response variable
A fisheries biologist studying whitefish in a Canadian
Lake collected data on the length (in centimeters) and
, egg production for 25 female fish. A scatter plot of her
results and computer regression analysis of egg
production versus fish length are given below. Note
that number of eggs is given in thousands (i.e., "40"
means 40,000 eggs).
What is the equation of the least-squares regression
line? - ✔️✔️Eggs = -142.74 + 39.25 (Length)
A jar contains 60 red marbles and 40 white marbles.
Mrs. Dentato draws 15 marbles randomly from the jar
without replacement. The dotplot below shows the
number of red marbles (out of 15) drawn in 200
computer
simulations of this random process.
The sample space for counting the number she
makes is - ✔️✔️{0, 1, 2, 3, 4, 5, 6, 7, 8}.
A candidate for mayor of Dallas wants to know what
proportion of city residents support his candidacy. His
staff calls 1,000 people chosen at random from the city
telephone directory and 850 of them respond. What
are the population and the sample in this example? - ✔
️✔️Population: all Dallas residents. Sample: the 850
people who respond
A company produces packets of soap powder that are
labeled "Giant Size 32 Ounces." The actual weight of
,soap powder in a box has a Normal distribution with a
mean of 33 oz. and a standard deviation of 0.7 ounces.
95% of packets actually contain more than x ounces of
soap powder. What is x? - ✔️✔️31.85
A farmer wishes to determine which of two brands of
baby pig pellets, Kent or Moormans, produces better
weight gains. Two of his sows each give birth to litters
of 10 pigs on the same day, so he decides to give the
baby pigs in litter A only Kent pellets, while the pigs in
litter B will get only Moormans pellets. After four
weeks, the average weight gain for pigs in litter A is
greater than the average weight gain for pigs in litter B.
The feed they get is not the only factor affecting the
rate at which pigs gain weight. Genetic differences also
affect weight gain. It is likely that the pigs in litter A are
genetically different from the pigs in litter B,
,because the two litters have different mothers. Because
the farmer is only interested in determining which
brand of pellets is better, the study suffers from - ✔️✔
️onfounding
A farmer wishes to determine which of two brands of
baby pig pellets, Kent or Moormans, produces better
weight gains. Two of his sows each give birth to litters
of 10 pigs on the same day, so he decides to give the
baby pigs in litter A only Kent pellets, while the pigs in
litter B will get only Moormans pellets. After four
weeks, the average weight gain for pigs in litter A is
greater than the average weight gain for pigs in litter B.
The weight of the pigs after four weeks is - ✔️✔️the
response variable
A fisheries biologist studying whitefish in a Canadian
Lake collected data on the length (in centimeters) and
, egg production for 25 female fish. A scatter plot of her
results and computer regression analysis of egg
production versus fish length are given below. Note
that number of eggs is given in thousands (i.e., "40"
means 40,000 eggs).
What is the equation of the least-squares regression
line? - ✔️✔️Eggs = -142.74 + 39.25 (Length)
A jar contains 60 red marbles and 40 white marbles.
Mrs. Dentato draws 15 marbles randomly from the jar
without replacement. The dotplot below shows the
number of red marbles (out of 15) drawn in 200
computer
simulations of this random process.
