1. When measuring weight to the nearest pound, what are the real limits for a score of  pounds? (1pt each) and 2. When measuring weights to the nearest pounds, what are the real limits for a score of  pounds?  and

Suppose we take a sample of seven households from a low- to moderate-income neighborhood and collect information on their incomes and food expenditures for the past month. The information obtained (in hundreds of dollars) is shown below (3 pts each).  Income (X) Food Expenditure (Y) 35 9 49 15 21 7 39 11 15 5 28 8 25 9 a. Find the mean and standard deviation of X. b. Find the mean and standard deviation of Y.  c. Calculate the correlation between income and food expenditure.  d. Suppose you wish to predict food expenditure (Y) from income (X) using a best-fitting straight line. Find the intercept and slope of the regression line for these data and write the equation for the line represented by these coefficients. e. Interpret the slope and intercept of the regression line you found in part (d).    f. Predict the expenditure, on average, if a household income is 39. g. Calculate the coefficient of determination. 

Find the value of z, say , such that the following probability statements are true: (2 pts each) a. P(z < z0) = .8925      b. P(-z0 < z < z0) = .99      c.  P(z > z0) = .2420      d.  P(z < z0) = .0643     

37)     38mm

32)       5mm

39)     1  3/8″

Full Scale (Metric)

Match the lines 16-20 with their corresponding measurement using a 1/4” = 1” scale. (Quarter Size)

Match the lines 11-15 with their corresponding measurement using a 1/2” = 1” scale. (Half Size)

After you draw the lines for 41-50, put them in order from shortest to longest.