What is the sum of the terms of the series (-1) + (-2) + (-3) + + (-10)? a. -110b. -55c. -22

Step-by-step explanation:

The given series is

The first term of this arithmetic sequence is

the last term is  

The sum of the first n-terms is given by

The first 10 terms is

00

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;