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- Refer to the data display from a sample of airport data speeds in Mbps. What is the number of degrees of freedom that should be used for finding the critical value ta/2 ?Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below. LOADING... Click the icon to view a t distribution table. TInterval (13.046,22.15) x=17.598 Sx=16.01712719 n=50 Question content area bottom Part 1 a. What is the number of degrees of freedom that should be used for finding the critical value tα/2?Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below. LOADING... Click the icon to view a t distribution table. TInterval (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 tα/2? df=? (Type a whole number.)
- The results of an independent-measures research study are reported as "t(20) = 2.12, p < .05, two tails." For this study, what t values formed the boundaries for the critical region?using the z table (table e), find the critical value (or values) for each. a. alpha=0.10, two tailed test b. alpha=0.01, right tailed test c. aplha=0.005, left tailed testA research center claims that at least 2626% of adults in a certain country think that their taxes will be audited. In a random sample of 900900 adults in that country in a recent year, 2323% say they are concerned that their taxes will be audited. At alphaαequals=0.100.10, is there enough evidence to reject the center's claim? Complete parts (a) through (e) below. Identify the critical values
- Q1 A) List down the measures of central tendency and measures of dispersion 2) The operations manager of a plant that manufactures tires wants to compare the actual inner diameters of two grades of tires, each of B) which is expected to be 575 millimeters. A sample of five tires of each grade was selected, and the results representing the inner diameters of the tires, ranked from smallest to largest, are as follows. Grade X grade Y 568 570 575 578 584 573 574 575 577 578 requirement. a) for each of the tow grades of tries, compute the mwan, median, and standred deviation. b) which grade of tire providing better quality? explain. c) what would be the effect on your answer in (a) and (b) if the last value for grade Y were 588 insert 578 explain. C) The file contins the overall miles per gallon (MPG) OF 2010 family sedan: 24 21 22 23 24 34 34 34 20 20 22 22 44 32 20 20 22 20 39 20 Source:…Explain why the critical value of t, one-tailed, alpha = .05 is the same as the critical value of t, two-tailed, a .10 .What is the critical value? Wj\hat is the p value?
- State the t critical value that would be used for a 99% interval based on a sample size of 37.Department secretary has found the average number of complaints per week over the past few years is 1.4. However after a change in major requirements, the complaints over last 8 weeks averaged M = 3.0, with SS = 16. Has there been a significant increase in the number of student complaints over the past 8 weeks? What kind of t-test?______________ Test using alpha = .05 and write an APA style conclusion. 1) H0: H1: 2) Critical value: one or two-tailed? df= __ alpha = .05 __________ 3) Calculations: SS given so start w/ variance s2 SM t = M –µ SM 4) Is there a difference? Reject the Null? Write a sentence with APA stats.What is the p-value, t-critical value, and df?