Good evening, I have some questions that need answers please.

1.) Part 1?

Comparing scales: In an experiment to determine whether there is a systematic difference between the weights obtained with two different scales, 10 rock specimens were weighed, in grams, on each scale. The following data were obtained: Specimen Weight on Scale 1 Weight on Scale 2 1 12.69 12.36 2 16.23 16.43 3 9.33 9.44 4 11.76 12.20 5 26.23 27.16 6 10.25 10.64 7 15.22 15.68 3 7.31 7.30 9 14.14 14.07 10 22.09 22.26 {mg Let 11] represent the mean weight on Scale 1 and pd = 131 p.2. Can you conclude that the the mean weight differs between the Scales? Use the 01: 0.05 level of signicance and the 1184 Plus calculator to answer the following. Part: 0 I 4 Part 1 of4 (a) State the null and alternate hypotheses. H : 0 B EIEI E|=E| This hypothesis test is a {Choose one) 'I' test. lefttailed righttailed twotai led Growth Spurt: It is generally known that boys grow at an unusually fast rate between the ages of about 12 and 14. Following are heights, in inches of 10 boys, measured at age 12 and again at age 14. Age 12 Age 14 63 .3 69.6 61 .2 66.4 64.5 69.2 5 5 .9 62.0 60.4 65 .7 5 7.8 62.8 68 .3 73 .6 63.0 6'17 64.4 69.2 5 8 .2 64.6 Sail data 'In Email (a) Construct a 95% condence interval for the mean increase in height for boys between the ages of 12 and 14. Let 51' represent the height at age 14 minus the height at age 12. Use the 1184 calculator to nd the critical value and round the answers to at least two decimal places. A 95% condence interval for the mean increase in height for boys between 12 and 14 is g