Refer to the accompanying data display that results from a sample of arport data

Question

Refer to the accompanying data display that results from a sample of arport data speeds in Mbps. Complete parts (a) through (c) Tinterval 11 be o Cick the con tovewa t distribut on table (13.046,22.15) x17.598 Sx 16 01712719 n=50 a. What is the number of degrees of freedom that should be used for finding the crtical value t,/2 d Type whole number ) b. Find the critical value w 2 corresponding to a 95% confidence level 88 (Round to two decimal places as needed.) c. Give a brief general description of 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 B. The number of degrees of freedom for a collection of sample data is the number of unique, non repeated sample values number of degrees of freedom for a collection of sample data is the number of sample values that can vary ater 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 total number of sample value Click to select your answer(s)

Explanation / Answer

Q Exam3)

Its normal distribution

The area of shaded region is P(-.89<Z<1.26)
= P(Z<1.26) - P(Z<-.89)
= .8962-.1867
= .7094

Area of shaded region is .7094

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