Question

10(c)

me The data shown to the right represent the age (in weeks) at which babies firstf crawl, based on a survey of 12 mothers. Complete parts (a) through (c) below.. 30 35 26 37 52 44 47 56 37 52 Tes 54 Click here to view the table of critical t-values 26 Click here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table, Activ k 20 30 20 40 50 60 20 30 40 50 60 40 60 30 40 50 an Does the boxplot suggest that there are outliers? ok OA. Yes, there is at least one point that is greater than the third quartile or less than the first quarile. O B. Yes, there is at least one point that is outside of the 1.5(IQR) boundary c. No, there are no points that are outside of the 1.5(0QR) boundary OD. No, there are no points that are greater than the third quartile or less than the first quartile. ch Cont ababy first crawls. Select the correct choice and fil in the answer boxes to complete (e) Construct and interpret a 95% confidence your choice. (Round to one decimal place as needed.) interval for the mean age at which The lower bound is inteval r Succ A weeks. We are 95 % confident that the mean age at which a baby first crawls is within the confidence weeks and the upper bound is weeks. We are 95 % confident that the mean age at which a baby first crawis is outside of the O B. edia Li The lower bound is weeks and the upper bound is confidence interval. se Opt

Answer 1

t distribution confidence interval calculation.

months : Given that First crawl for babies based on 12 Samples given. are : 52 : 30 44 35 47 37 56 26 52 26 54 37 > mean G) = (Sum of Scumples) Number of samples .: NED (*).= 496 (5) 3 41.53 Started deviation (s)- Jeg Ray? (52-4133)2+(30-413) 7 ---+ (44-4133) ht) 12-1 1318.66 S = 12185.56 a = 10.948 a 10.95 95% confidence interval |C.I = T I dx2.5 to = tocs = to.os rat (n-1) = (127) = 1) degrees of freedom tey = 2-2011

i C-I = 4.33 € 2201 * loans Joe = 41.33 6-957 E = ( 34.372, 48.287) 951. C-I suu meu : The lever beend is 34.372, and the Cupper bound is 48.28] we are 95%. Confident the mean age at which a baby first crawls is with in the confidence interval.