Claim: Fewer than 9.6% of homes have only a landline telephone and no wireless phone. Sample data: A survey by the National Center for Health Statistics showed that

among 13,347 homes 5.79% had landline phones without wireless phones. Complete parts (a) and (b).

a. Express the onginal claim in symbolic form. Let the parameter represent a value with respect to homes that have only a landline telephone and no wireless phone.

(Type an integer or a decimal. Do not round.)

b.Identiry the null and alternative hypotheses

Ho

Н4:

(Type integers or decimals. Do not round.)

A poll of 1052 Americans showed that 47.4% of the respondents prefer to watch the news rather than read or listen to it. Use those results with a 0.10 significance level to test the claim that fewer than half of Americans prefer to watch the news rather than read or listen to it. Use the P-value method. Use the normal distribution as an approximation to the binomial distribution.

Let p denote the population proportion of all Americans who prefer to watch the news rather than read or listen to it. Identify the null and alternative hypotheses.

: p ____   ____

: p ____   ____

(Type integers or decimals. Do not round.)

Identify the test statistic.

z = ____

(Round to two decimal places as needed.)

Identify the P-value.

P-value = ____

(Round to three decimal places as needed.)

State the conclusion about the null hypothesis, as well as State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim.

____ the null hypothesis. There ____ sufficient evidence to ____ the claim that fewer than half of Americans prefer to watch the news rather  than read or listen to it.

26. The null and alternative hypotheses are stated in terms of the statistics from the random sample. A) True B) False

Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect, so the probability of a girl ls 0.5. Assume that the groups consist of 17 couples. Complete parts (a) through (c) below.

The value of the mean is = ____

(Type an integer or a decimal. Do not round.)

The value of the standard deviation is = ____

(Round to one decimal place as needed.)

b. Use the range rule of thumb to find the values separating results that are significantly low or significantly high.

Values of ____ girls or fewer are significantly low.

(Round to one decimal place as needed.)

Values of ____ girls or greater are significantly high.

(Round to one decimal place as needed.)

c. Is the result of 15 girls a result that is significantly high? What does it suggest about the effectiveness of the method?

The result ____ significantly high, because 15 girls is ____ ____  girls. A result of 15 girls would suggest that the method ____ 

(Round to one decimal place as needed.)