According to credit reporting agency experian, the population of consumer credit card holders carries an average credit card balance of $5500, with a standard deviation of $750. you plan to draw a random sample of 625 credit card holders from this population. a. what is the probability that the average credit card balance for the sample will be somewhere between $5450 and $5550? b. how likely is it that the average balance in the sample will be within +1 standard deviation (that is, £ 10x) of the population average? within 12 standard deviations? c. it is 95% likely that the sample average will be within =$ the population average.

Astudent is determining the influence of different types of food on the growth rate of spiders. she feeds one group of spiders two caterpillars twice a week. the other group received similarly-sized beetles twice a week. she records the amount of time required for individuals to reach sexual maturity. her hypothesis is that the spiders feeding on caterpillars will have a faster growth rate because caterpillars have a higher protein content compared to beetles. in this experiment, what is the dependent variable? spiders assigned to different feeding groups. time required to reach sexual maturity number of prey items fed twice a week. growth rates of each group.