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Pruthvi R

Numerade Educator

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Numerade tutor for 4 years
216 Students Helped

Pruthvi's Quick Ask Videos

06:23
Intro Stats / AP Statistics

Which of the following is not a sample space for the experiment of flipping a coin 3 times?
A. {all flips are the same, there is exactly one tail, there are exactly two tails}
B. {there is exactly one head, all flips are the same}
C. {all the flips are heads, exactly two tails are flipped, there are an odd number of tails}
D. {all the flips are heads, there are an odd number of tails, exactly one head is flipped}
E. {all flips are the same, there is at least one head and at least one tail}

05:16
Intro Stats / AP Statistics

Sketch a normal curve with the following parameters:
(a) Mean of 15 and standard deviation of 2.
(b) Mean of 15 and standard deviation of 3.
(c) Mean of 12 and standard deviation of 2.
(d) Mean of 12 and standard deviation of 3.
(e) Consider two normal curves. If the first one has a larger mean than the second one, must it have a larger standard deviation as well? Explain your answer.
Yes. The values of μ and σ are independent.
Yes. As μ increases, σ must also increase.
No. As μ increases, σ will decrease.
No. The values of μ and σ are independent.

03:29
Intro Stats / AP Statistics

Suppose the manager of a shoe store wants to determine the
current percentage of customers who are males. How many customers
should the manager survey in order to be 98% confident that the
estimated (sample) proportion is within 4 percentage points of the
true population proportion of customers who are males?

z0.10 1.282
z0.05 1.645
z0.04 1.751
z0.025 1.960
z0.01 2.326
z0.005 2.576

06:11
Intro Stats / AP Statistics

A company buys a policy to insure its revenue in the event of major snowstorms that shut down business. The policy pays nothing for the first such snowstorm of the year and $10,000 for each one thereafter, until the end of the year. The number of major snowstorms per year that shut down business is assumed to have a Poisson distribution with a mean of 1.0. What is the expected amount paid to the company under this policy during a one-year period?

06:49
Chemistry 101

If 22.7 g of NO and 13.8 g of O₂ are used to form NO₂, how many moles of excess reactant will be left over? 2 NO (g) + O₂ (g) → 2 NO₂ (g)

01:44
Intro Stats / AP Statistics

What is the probability that a randomly selected resident of
this neighborhood both owns a car and uses public transport? Uses
public transport and owns a car 34 Uses public transport and does
not own a car 94 Does not use public transport and owns a car 126
Does not use public transport and does not own a car 17 It is
suggested that you develop a table to assist your response.
A. 0.125
B. 0.153
C. 0.213
D. 0.266

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