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Find standard deviation for the following data:
X 6 9 12 15 18
f 7 12 13 10 8
Find median for the following data:
X 5 10 15 20 25
f 25 20 15 10 5
When the first proof of 392 pages of a book of 1200 pages were
read , the distribution of printing mistakes were found to be as
follows
No of mistakes in a page (x) 0 1 2 3 4 5
No of pages (f) 275 72 30 7 5 2
Fit a Poisson distribution to the above data and test the goodness of
a survey from independent agency found that 40% of consumers receive their spending money from their jobs. if 6 people are selected at random, find the probability that at least 4 of them received their spending money from their other jobs.
One sample has n=6 scores with a mean of . A second sample has n=4 scores with a mean of . If the two samples are combined, what is the mean for the combined sample?
A random sample of n = 45 values give = 63. Can this sample be regarded as drawn from a
A normal population with mean μ = 70 and s2 =25?
Compute the least square regression line for a sample of 6 pairs of observations, given that
xi = 5, 4, 6, 3, 8, 7, Ʃy = 150, Ʃxy = 404, (y-ybar)2=37, (y-yhat)2=15
Also calculate the Co-efficient of determination and interpret the result.
Michael likes to go for daily jogs with his dog, Max. If the weather is nice, he is 90% likely to jog for 5km. If the weather is rainy, he is only 55% likely to jog for 5km. The weather forecast for tomorrow indicates 40% chance of rain. Determine the probability that Michael will jog for 5km.
A company tested 735 of the lightbulbs they produced and found them to have a mean life of 1,200 hours and a standard deviation of 50 hours. How many of these lightbulbs had a life between 1,170 hours and 1,230 hours?
random balls are selected from the bag includes 4 blue and 4 red balls .if there are more reds than blues among the balls you take out at any time in the process you will stop the process .how possibility are you to get all 8 balls without encountering such a situation?
#340153 on Dec 2023