In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to6985 subjects randomly selected from an online group involved with ears. There were 1316 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
In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to6985 subjects randomly selected from an online group involved with ears. There were 1316 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
In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to6985 subjects randomly selected from an online group involved with ears. There were 1316 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
In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to6985 subjects randomly selected from an online group involved with ears. There were 1316 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
Transcribed Image Text:22. In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6985 subjects randomly selected from an online group involved
with ears. There were 1316 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.
OA. Ho:p> 0.2
H₁: p=0.2
O C. Ho: p=0.2
H₁: p<0.2
O E. Ho: P#0.2
H₁: 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.)
Because the P-value is (1).
that the return rate is less than 20%.
(2)
(1) O greater than
O less than
the significance level, (2).
reject
fail to reject
insufficient
sufficient
OB. Ho: p=0.2
H₁: p=0.2
O D. Ho: p=0.2
H₁:p> 0.2
OF. Ho: p<0.2
H₁:
p=0.2
the null hypothesis. There is (3)-
evidence to support the claim
Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.
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