Hello Kitty Company claims that the proportion of its employees investing in individual investment accounts is higher than national proportion of 50%. A survey of 100 employees in Hello Kitty Company indicated that 58 of them have invested in an individual investment account. Assume Amanda wants to use a 0.10 significance level to test the claim.

(a) Identify the null hypothesis and the alternative hypothesis.

(b) Determine the test statistic.

(c) Determine the P-value for this test.

(d) Is there sufficient evidence to support Hello Kitty Company's claim that the proportion of its employees investing in individual investment accounts is higher than 50%? Explain.