## Answers

**Question 4)**

We have given: n=25 , population standard deviation = 1.2 and sample mean = 4.68

For finding the P value in Ti-84 plus calculator we please follow the commands,

Here population standard deviation is known hence we can use Z test.

1. Press STAT -----------> Select TESTS

2. In TESTS select 1) Z - Test ---------> Stats

3. Please enter the required value, that is-

= 5

= 1.2

X bar= 4.68

n = 25

< _{0} and hit the calculate button so we get -

**P value = 0.0912**

**Question 5)**

n = 49 , x bar = 10.5 , = 9 , = 14

For the given data we get -

**P value = 0.2266**

**Question 6)**

n = 36 , x bar = 2.8 , = 7 , = 18

For the given data we get -

**P value = 0.1615**

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