Question

Below table is for service time on a wool station, calculate
the average
Service time.
class
Interval
10-20
30-40
40-50
so-60
frequency
15.
0-10
20-30
8
2​

Answer 1

Answer:

ggg dhakka c45-&_₹7-3+83(+4(83++3)972(

Explanation:

vgQhywhghwjuytshhywhhVWbvfvshbbgghuwujgfjihgywyyyyThe federal government awarded grants to the agricultural departments of 9 universities to test the yield capabilities of two new varieties of wheat. Each variety was planted on a plot of equal area at each university, and the yields, in kilograms per plot, were recorded as follows:

University Variety123456789 1382335414429373138 2452531385033364043

Find a 95% confidence interval for the mean difference between the yields of the two varieties, assuming the differences of yields to be approximately normally