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Sergeu [11.5K]
3 years ago
15

A team of psychologists studied the effect of multitasking on the completion of cognitive tasks. A group of 40 women participate

d in the study. Each woman owned a smartphone equipped with the same type of keyboard. The women typed a text passage on the phone twice, one time while sitting in a quiet room (a single task) and the other time while walking (a multitask). The order of the single task and the multitask was randomly determined for each woman. The psychologists recorded the time it took each woman to type the test for both tasks. If the conditions of inference are met, which of the following tests is most appropriate to analyze the data? (A) (B) (C) (D) (E) A two-sample t-test for a difference between means A matched-pairs t-test for a mean difference A one-sample z-test for a proportion A two-sample z -test for a difference between proportions A chi-square test of independence
Mathematics
1 answer:
kakasveta [241]3 years ago
5 0

Answer: Matched-pairs t-test

Step-by-step explanation:

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In a state where license plates contain six digits, what is the probability that the license number of a randomly selected car h
andre [41]

Answer:

Step-by-step explanation:

Given : In a state where license plates contain six digits.

Probability of that a number is 9 = \dfrac{1}{10}   [Since total digits = 10]

We assume that each digit of the license number is randomly selected  .

Since each digit in the license plate is independent from the other  and there is only two possible outcomes for given case (either 9 or not), so we can use Binomial.

Binomial probability formula:  P(X=x)=^nC_xp^x(1-p)^{n-x}

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Let x be the number of 9s in the license plate number.

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Then, the probability that the license number of a randomly selected car has exactly two 9's will be :

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3 years ago
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Answer:

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Step-by-step explanation:

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2 years ago
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Answer:

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Answer:

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When you see (f * g)(x), this means that we are going to be multiply f(x) and g(x) together.

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Now, we multiply these terms together.

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