Ten Secretaries Were Selected at Random from Among the Secretaries

question 150

Short Answer

Ten secretaries were selected at random from among the secretaries of a large university. The typing speed (number of words per minute) was recorded for each secretary on two different brands of computer keyboards. Assume that the typing speeds are not normally distributed. The following results were obtained. Test to determine if these data provide enough evidence at the 5% significance level to infer that the brands differ with respect to typing speed.
z-statistic = ______________
Reject if |z| > ______________
Conclusion: ______________
These data ______________ enough evidence at the 5% significance level to infer that the brands differ with respect to typing speed.

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Definitions:

Social Security Tax

A mandatory tax levied on both employers and employees to fund the Social Security program.

Medicare Tax

A federal tax that funds Medicare, a health care program for individuals who are 65 and older, which is deducted from employees' paychecks.

State Unemployment Tax

Taxes imposed by states on businesses to fund state unemployment insurance programs.

Salaries Payable

An account that represents the total amount of wages earned by employees, but not yet paid by the employer.