In a study of cell phone usage and brain hemispheric dominance, an Internet surv

Question

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 1344 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. ldentify the null hypothesis and alternative hypothesis. O A. Ho: p> 0.2 H1 :p=02 OC. Ho: p 0.2 H1 : p=0.2 E. Ho:p#02 Hip-02 OB, OD. OF, Ho:p=02 Hip#02 Ho:p= 0.2 H p 0.2 Ho : p=02 H p

Explanation / Answer

The statistical software output for this problem is:

One sample proportion summary hypothesis test:
p : Proportion of successes
H0 : p = 0.2
HA : p < 0.2

Hypothesis test results:

Hence,

Null and alternative hypotheses: Option F is correct.

z = -1.59

P - value = 0.056

Greater; do not reject; not

Proportion Count Total Sample Prop. Std. Err. Z-Stat P-value p 1344 6985 0.19241231 0.0047860451 -1.5853774 0.0564

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