a study ui he return rate is less than 20%. Use the P-value method and use the normal distribution as an approximation to the binomial distribution. Identify the null hypothesis and alternative hypothesis. OA. Ho p<02 O B. Ho p=0.2 H p<02 Hy p=02 OC. Ho p=02 H p>02 OD. Ho p/02 H p=02 OE. Ho p>02 H, p=02 OF Ho p-02 H, p*02 The test statistic is z= (Round to two decimal places as needed) The P-value is (Round to three decimal places as needed) V the null hypothesis There is V evidence to support the claim that the return rate is less than 20% Because the P value is V the significance level,
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
 alt="In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6959 subjects randomly selected from an online group involved with ears. There were 1319 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.
Identify the null hypothesis and alternative hypothesis.
O B. Ho p= 0.2
O A. Ho p<0.2
H:p=0.2
H1:p<0.2
O D. Ho p 0.2
O C. Ho: p=0.2
H:p>0.2
H:p=0.2
O E. Ho p>0.2
H1ip=0.2
O F. Ho p=0.2
H: p#0.2
The test statistic is z =
(Round to two decimal places as needed.)
The P-value is
(Round to three decimal places as needed.)
the null hypothesis. There is
evidence to support the claim that the return rate is less than 20%.
the significance level,
Because the P-value is
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