QUESTION 7 The annual report of a service company published that the average length of phone call of the company's customer care is 5.6 minutes with standard deviation 0.98. Fifteen calls were taken as a sample to get his result. Find a 95% confidence interval. O (4.99, 6.23) O (5.10, 6.10) (5.15, 6.05) O (5.06, 6.14)

Q: 2/18 – 12/32 + 3V50

A: The solution is given below in the next step:

Q: 3 -4- -0- 4. 2.

A:

Q: 5 -100 12 8

A: Solve the given

Q: 2/5+4/8

A: We have to find the sum

Q: 12 5(.8)0

A: We can solve given problem by using G.P series.

Q: 10 8/10 + 9 7/12=

A:

Q: 5/14+1/6

A: 514+16=15+742

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A: Given that the expression is

Q: 4 11  ✕  5 9

A: Consider the given expression as 411×59. 411×59=4×511×9=2099

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A: The solution is given in the next step.

Q: 7,20

A:

Q: sing the geometry of the graph ,evalvate the definite integrals.

A: As this is a multiple subpart question according to the Bartleby Answering rule, only first three…

Q: 6   9,171.6

A:

Q: Expand (a −b)4

A: