In a study of cell phone usage and brain hemispheric dominance, an internet survey was e-mailed to 6969 subjects randomly selected from an online group involved with ears. there were 1302 surveys returned. use a 0.01 significance level to test the claim that the return rate is less than 20%. use the p-value method and use the normal distribution as an approximation to the binomial distribution. so i'm wondering, how do i find the z-score? the test statistic? ?

8p+(-9)

(-9)3p+5p and you can swith em around

in counting the number of heads in 4 coin flips, the probability that we get exactly one head is the probability that we get anyone of the following 4 outcomes: httt, thtt, ttht, or ttth. each has probability 1/16, so the probability to get exactly one head in 4 flips is 1/16 + 1/16 + 1/16 + 1/16 = 4/16 = 1/4.

answer: ⇒ d. (7.3)(8.52)=62.19

step-by-step explanation:

product it's going to be multiply by the numbers, fractions, factors, and multiples.

1. (29.5)(1.7)=50.15

2. (13.2)(4.5)= 59.4

3. (4.67)(9.8)= 45.76

4. (7.3)(8.52)= 62.19

hope this !

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