Estimating Addition and Subtraction Mitchell and his friends went to the candy store, where they can buy candy by the
pound. Mitchell bought 1.2 pounds of candy. His friends bought 2.3 pounds and 1.8
pounds. About how many pounds of candy did they buy altogether?

show your work please

Given z value let x be a normal random variable with standard deviation (d) = 1.65 (i) find the margin of error for a 90 percent confidence interval for mean corresponding to a sample size of 12 (3/100) (ii) interpret the result of question 3( (4/100) /- [cpt115] -5 (ii) with reference to question 3(d)(i), find an approximate 90 percent confidence interval for mean if the 12 sample values of x are as follows: 95 103 107 98 90 110 92 108 90 94 105 100 (7/100) interpret the result of question 3(d)(ii) (iv)