Last year, 43% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicates that 30% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 60 business owners.
(a)How many business owners in the survey plan to provide a holiday gift to their employees this year?
(b)Suppose the business owners in the sample did as they plan. Compute the p-value for a hypothesis test that can be used to determine if the proportion of business owners providing holiday gifts has decreased from last year.
Find the value of the test statistic. (Round your answer to two decimal places.)
Find the p-value. (Round your answer to four decimal places.)
p-value =
(c)Using a 0.05 level of significance, would you conclude that the proportion of business owners providing gifts decreased?
Reject H0. There is sufficient evidence to conclude that the proportion of business owners providing holiday gifts has decreased from last year.
Do not reject H0. There is insufficient evidence to conclude that the proportion of business owners providing holiday gifts has decreased from last year.
Reject H0. There is insufficient evidence to conclude that the proportion of business owners providing holiday gifts has decreased from last year.
Do not reject H0. There is sufficient evidence to conclude that the proportion of business owners providing holiday gifts has decreased from last year.
d) What is the smallest level of significance for which you could draw such a conclusion? (Round your answer to four decimal places.)
Given that
population proportion p = 0.43
sample proportion p(hat) = 0.30
sample size n = 60
(A) Expected number of business owners = n*p(hat)
= 60*0.3
= 18
(B) Using TI 84 calculator
Press STAT then TESTS and then select 1-PropZTest
enter data
Test statistic z = -2.03
p value = 0.0212
(C) p value is less than 0.05 significance level, so we can reject the null hypothesis.
Reject H0. There is sufficient evidence to conclude that the proportion of business owners providing holiday gifts has decreased from last year.
(D) We know that p value is smallest level of significance for which we can reject null hypothesis
so, level of significance = 0.0212
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