If other factors are held constant, what happens to a confidence interval if the sample variance increases?

a. the standard error increases and the width of the interval increases.
b. the range of t scores increases and the width of the interval increases.
c. the standard error decreases and the width of the interval decreases.
d. the range of t scores decreases and the width of the interval decreases.

Suppose you want to know if more technical service calls are made to homes with cable television or with satellite dish television. should you use frequencies or relative frequencies to make the comparison? why?

The following information is available for juno company for the month ending june 30, 2019. * balance as per the bank statement is $ 11 comma 000. * balance as per books is $ 10 comma 400. * check #506 for $ 1 comma 200 and check #510 for $ 900 were not shown on the june 30, bank statement. * a deposit in transit of $ 3 comma 346 had not been received by the bank when the bank statement was generated. * a bank debit memo indicated an nsf check for $ 70 written by jane smith to juno company on june 13. * a bank credit memo indicated a note collected by the bank of $ 1 comma 900 and interest revenue of $ 51 on june 20. * the bank statement indicated service charges of $ 35. what is the adjusted book balance?

Advertisers are usually very conscious of their audience. choose an issue of a popular magazine such as time, sports illustrated, vanity fair, rolling stone, or the like. from that issue select three advertisements to analyze. try to determine the audience being appealed to in each advertisement and analyze the appeals used to persuade buyers. how might the appeals differ is the ads were designed to persuade a different audience.