Stats Check-In's: 4.1- 4.5 UPDATED Questions and CORRECT Answers
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Stats Check-In\\\'s
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Stats Check-In\\\'s
Stats Check-In's: 4.1- 4.5 UPDATED
Questions and CORRECT Answers
It is estimated that 45% of households own a riding lawn mower. A sample of 18 households
is studied. What is the probability that exactly 7 of these own a riding lawn mower? -
CORRECT ANSWER- 0.1657
Determine the indicated pro...
Stats Check-In's: 4.1- 4.5 UPDATED
Questions and CORRECT Answers
It is estimated that 45% of households own a riding lawn mower. A sample of 18 households
is studied. What is the probability that exactly 7 of these own a riding lawn mower? -
CORRECT ANSWER- ✔✔0.1657
Determine the indicated probability for a binomial experiment with the given number of trials
n and the given success probability p.
n = 15, p = 0.6, P(10) - CORRECT ANSWER- ✔✔0.1859
Determine the indicated probability for a binomial experiment with the given number of trials
n and the given success probability p.
n = 11, p = 0.7, P(9) - CORRECT ANSWER- ✔✔0.1998
It is estimated that 25% of households own a riding lawn mower. A sample of 18 households
is studied. What is the probability that exactly 10 of these own a riding lawn mower? -
CORRECT ANSWER- ✔✔0.0042
A multiple choice quiz consists of 100 questions, each with 5 possible answers. Find the
mean for the number of correct answers, if a student guesses on each question - CORRECT
ANSWER- ✔✔20.0
A die is rolled 360 times. Find the standard deviation of the number of times a 3 will be
rolled. - CORRECT ANSWER- ✔✔7.1
Find the mean for the values of n and p when the conditions for the binomial distribution are
met.
n = 600, p = 0.35 - CORRECT ANSWER- ✔✔210
A computer store has 75 printers of which 25 are laser printers and 50 are ink jet printers. If a
group of 10 printers is chosen at random from the store, find the mean and variance of the
number of ink jet printers. - CORRECT ANSWER- ✔✔Mean = 6.7, Variance = 2.2
, It is estimated that 40% of households own a riding lawn mower. A sample of 12 households
is studied. What is the probability that more than 9 of these own a riding lawn mower? -
CORRECT ANSWER- ✔✔0.0028
The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is
estimated that 45% of adult Australian sheep dogs weigh 65 pounds or more. A sample of 10
adult dogs is studied. What is the probability that no more than 3 of them weigh 65 lb or
more? - CORRECT ANSWER- ✔✔0.2660
The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is
estimated that 45% of adult Australian sheep dogs weigh 65 pounds or more. A sample of 11
adult dogs is studied. What is the probability that more than 8 of them weigh 65 lb or more? -
CORRECT ANSWER- ✔✔0.0148
Determine the indicated probability for a binomial experiment with the given number of trials
n and the given success probability p.
n = 11, p = 0.2, P(Fewer than 4) - CORRECT ANSWER- ✔✔0.8389
The following table presents the probability distribution of the number of vacations X taken
last year for a randomly chosen family. Compute the mean μ.
The number of cartoons watched on Saturday mornings by students in Mrs. Kelly's first grade
class is shown below.
Number of cartoons watched X: 0, 1, 2, 3, 4, 5.
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