Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below. TInterva E Click the icon to view at distribution table. (13.046,22.15) X= 17.598 Sx = 16.01712719 n= 50 a. What is the number of degrees of freedom that should be used for finding the critical value t2? df =O (Type a whole number.) b. Find the critical value t2 corresponding to a 95% confidence level. (Round to two decimal places as needed.) c. Give a brief general description of the number of degrees of freedom. O A. The number of degrees of freedom for a collection of sample data is the total number sample values. O B. The number of degrees of freedom for a collection of sample data is the number of sample values that can vary after certain restrictions have been imposed on all data values. OC. The number of degrees of freedom for a collection of sample data is the number of sample values that are determined after certain restrictions have been imposed on all data values. O D. The number of degrees of freedom for a collection of sample data is the number of unique, non-repeated sample values.

On average, Upstate Chevrolet sells 20 cars each week, with a standard deviation of 2. How many cars sold represents 2 standard deviations above the mean? Answer     How many cars sold represent 1 standard deviation below the mean? Answer     Approximately 68% will fall between Answer   and Answer   .   Approximately 99.7% will fall between Answer   and Answer   .   What is the probability that the car lot will sell at least 18 cars? Answer   %   What is the probability that a car lot will sell at most 26 cars? Answer   %

The accompanying table contains data on the weight, in grams, of a sample of 50 tea bags produced during an eight-hour shift. Complete parts (a) through (d). Click the icon to view the data table. (Round to two decimal places as needed.) Find the p-value. p-value = .819 (F State the conclusi Do not reject H b. Construct a 90 The 90% confider (Round to four de Interpret the 90% More Info Tea Bag Weight (in grams) 5.65 5.45 5.42 5.41 5.53 5.34 5.54 5.46 5.53 5.59 5.42 5.51 5.55 5.54 5.61 5.56 5.47 5.44 5.49 5.39 5.46 5.63 5.53 5.32 5.68 5.29 5.49 5.76 5.56 5.41 5.57 5.59 5.52 5.33 5.49 5.54 5.61 5.44 5.45 5.24 5.56 5.63 5.49 5.58 5.68 5.43 5.49 5.57 5.58 5.35 I X

USA Today reported that about 20% of all people In the United States are Illiterate. Suppose you take eleven people at random off a city street. P USE SALT (a) Make a histogram showing the probability distribution of the number of illiterate people out of the eleven people in the sample. 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 2 3 4 5 7. 8 9 10 11 0 1 2 3 4 5 6 78 9 10 11 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 0. 0 1 2 3 4 5 6 7 8 9 10 11 0 1 2 3 45 6 7 8 9 10 11 (b) Find the mean and standard deviation of this probability distribution. (Round your standard deviation to two decimal places.) people people Find the expected number of people in this sample who are illiterate. people

Use the accompanying table of z-scores and percentiles to find the percentage of data items in a normal distribution that lie between z=0.9 and 2-1.6. Click the icon to view the table of z-scores and percentiles KECI The percentage of data items in a normal distribution that lie between 2-0.9 and 2 1.6 is% (Round to two decimal places as needed.)

Q1. A study was conducted to investigate the relationship between premature birth and mental development at 12 months. The infant's birth weight was used as an index of prematurity. At age 12 months, the child's mental development was recorded. The results are shown below (the weights are in pounds): Birth 4 6 7 8 Weight(x) Developmental 85 Quotients(y) 88 87 94 96 Summary: n = 5, £x=30, £x² = 190, Ey= 450, Ey² = 40590, Exy = 2728 . a. Find the least square prediction equation, y on x. b. Obtain a 95% confidence interval for the average value of y when x 6.5 (i.e., a C.I. for E(y|x= 6.5)). c. Obtain the coefficient of correlation (r) and interpret the result. d. Test the hypothesis that H, :p= 0 vs. H, : p0. Use a =0.05.

What is the x-bar calculated to 2 decimal places

k. Find the p nding to the data speed 5.9 Mbps. 0.2 0.2 0.2 03 05 E 0.7 0.9 1.5 1.7 2.2 2.4 37 3.9 4.3 5.7 91 94 94 10 5 11.3 12.3 13.7 14 9 15.3 25 8 Percentile of 5.9 =0.2 (Round to the nearest whole number as needed.) LO O 2N O o N 5 O 2N

Maps PQ Lawmaker's Trial Is.. C Home | Chegg.com M class Jose M - ilmar. V Citation Machine.8 Healthcare Spendin.. An experiment was conducted to measure the effectiveness of various feed supplements on the growth rate of chickens. A five number summary of the weights of the chicks in grams six weeks after hatching is as follows. Source: Anonymous (1948) Biometrika, 35, 214. • Min = 109 • Q1 = 194 ge rces Median = 253 Q3 = 314 Max = 413 ices 1. About percent of the chicks weigh more than 194. 2. About percent of the chicks weigh more than 253! 3. About percent of the chicks weigh more than 314. 4. About percent of the chicks weigh between 194 and 314. Submit Question ! 64°F search 144 -back 1% 6. 7

your car is more crowded than you think.  table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. The survey stated that the average car occupancy was 1.4 people. check that calculation.