different meanings

If two samples have means of 24 and 28 and standard deviations of 4 and 6, with 12 and 15 as the sizes, find the z score for difference of two population means. => 2.07 or 7.73 or 1.07 or 1.93..

Two arithmetic means are inserted between 30 and 78. What is the common difference? => 16 or 48 or 24 or 14..

The data corresponding to the number of left handed people of 20 offices of two cities is as shown. Check out if both the mean values differ significantly for 95% and 98% confidence levels. => means do not differ at 95% and differ at 98% or mea..

A random sample of the number of students accessing the internet during the working hours of three different schools is given. At α = 0.05, find the F test value and is there evidence to conclude a difference in means? => 0.19, all the means are same or..

Before we perform the t test in order to test the difference between two means (independent samples) we need to perform _____ test to check the difference between ______. => F test, means or F test, variances or z test, means or z test, variances..

The mean number of rooms of 100 hotels of town A and 150 hotels of town B are 60 and 50 with standard deviations 4 and 4.47. Find out the P-value and verify if the means differ at 98% confidence level? => 0.4999, the means differ significantly or 0...

The distances traveled in kilometers by a person on four different days is: 63, 42, 55, 40. Find the mean distance and standard deviation. => Mean = 54, standard deviation = 9.5 or Mean = 54, standard deviation = 6.3 or Mean = 50, standard deviation..

Arithmetic Mean (A.M.) - 1. If a, x, b are in A.P, then x is called the arithmetic mean (A.M.) between the extremes a and b. 2. a. To insert n arithmetic means between two given quantities. Let a and b be any two given quantities, and let A 1 ,A 2 ,A 3 ,-----A n be n a..

The principal of a school found the mean age of 40 students of one class as 16.50 and that of 50 students of another class as 16. If the standard deviations are 2.83 and 3, find out if their mean ages differ at 99.73% and 98% confidence levels. => the mean ag..

The price of a cheese pizza in five different pizza delivery shops are $5, $4, $6, $8, and $7. Find the mean price of a cheese pizza. => $7 or $4 or $5 or $6..