In finding confidence intervals for the mean of a normal population by using a t-statistic, - 6155

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In finding confidence intervals for the mean of a normal population by using a t-statistic, student A uses a confidence coefficient of 0.95 while student B uses 0.99. Which one of the following statements is true about the length of the confidence intervals found by A and B?

a. B's interval will always be smaller than A's interval

b. B's interval will usually be smaller than A's interval

c. B's interval will always be larger than A's interval

d. B's interval will usually be larger than A's interval

 
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