a) The mean number of calls to a recestraints after 4pm on weekday requesting for fruit...

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a) The mean number of calls to a recestraints after 4pm on weekday requesting for fruit salad is 8. What is the probability that on any weekday after 4pm, there would be 11 calls? (5mks) b) Why s a sample not 100% accurate in estimating the population. (3mks) c) The distribution of 1.5 once chocolate bar is normal with a mean of 225 calories and a standard deviation of 10 calories. Find the probability that a randomly selected bar will have between 200 and 220 calories. (4mks) d) The data below shows the amount of calories per serving to 30 customers selected at random from a "first food outlet" 12 2 1 22 3 17 13 12 13 1 4 3 73 9 2 12 2 1 9 7 15 8 3 2 40 5 18 5 2 16 Find: (i) (ii) (iii) The mean of the sample The standard deviation The confidence interval for the true mean N. a) The mean number of calls to a recestraints after 4pm on weekday requesting for fruit salad is 8. What is the probability that on any weekday after 4pm, there would be 11 calls? (5mks) b) Why s a sample not 100% accurate in estimating the population. (3mks) c) The distribution of 1.5 once chocolate bar is normal with a mean of 225 calories and a standard deviation of 10 calories. Find the probability that a randomly selected bar will have between 200 and 220 calories. (4mks) d) The data below shows the amount of calories per serving to 30 customers selected at random from a "first food outlet" 12 2 1 22 3 17 13 12 13 1 4 3 73 9 2 12 2 1 9 7 15 8 3 2 40 5 18 5 2 16 Find: (i) (ii) (iii) The mean of the sample The standard deviation The confidence interval for the true mean N.