Question: 1. A 90% confidence interval for the difference between mean male and female salaries (Male minus Female) has which of the following limits, assuming equal

1. A 90% confidence interval for the difference between mean male and female salaries (Male minus Female) has which of the following limits, assuming equal population variances? (Because of potential roundoff, choose the closest.)

a. -$586 to $19,002

b. -$2,026 to $20,443

c. $1,013 to $17,403

d. -$3,756 to $22,173

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2. A 90% confidence interval for the proportion of all people who spent less than $1800 has which of the following limits? (Because of potential roundoff, choose the closest.)

a. 0.597 to 0.803

b. 0.610 to 0.790

c. 0.625 to 0.775

d. 0.582 to 0.818

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