The following table gives the marks obtained by a group of 80 students in an examination. Calculate the variance. Marks obtained No. of students Marks obtained No. of students 10-14 2 34-38 10 14-18 4 38-42 8 18-22 4 42-46 4 22-26 8 46-50 6 26-30 12 50-54 2 30-34 16 54-58 4

Q: Estimate the mean and variance for these sets of numbers: 20, 21, 12,16,24,24, 23,15, 20, 19, 25,…

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Q: ge of Husband (years) 23, 27, 28 29, 30, 31, 33, 35, 36, 39 ge of Wife (years) 18, 22, 23, 24, 25,…

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Q: Calculate the mean, median, mode, variance, and range for the following data using calculator. Cross…

A: MeanX=sum of all the observtionnumber of the observationRange=Largest value-smallest…

Q: QUESTION 2 The symbol used for the variance of the sample is 00 b. 02. C. S. d. s2.

A: a) population standard Deviation = σ b) Population Variance = σ2 c) Sample standard Derivation = s…

Q: 4 4 3 2 2 О-2 3-5 6-8 9-11 12-14

A: Histogram

Q: A researcher wants to know if the news station a person watches is a factor in the amount of time…

A: There are 3 independent samples which are Local, FOX and CNN. We have to test whether that station…