A sample of 900 computer chips revealed that 75% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature claimed that above 72% do not fail in the first 1000 hours of their use. Is there sufficient evidence at the 0.05 level to support the company's claim

No the evidence is not sufficient

Step-by-step explanation:

From the question we are told that

    The  sample  size is  

   The  sample  proportion is  

    The  population proportion is  

The  Null hypothesis is

The  Alternative  hypothesis is

The level of significance is given as  

The critical value for the level of significance is  

 Now the test statistic is mathematically evaluated as

substituting values

Since the critical value is  greater than the test statistics then the Null hypothesis is rejected which there is no sufficient evidence to support the claim

1. 3

2. 4

3. 1

hope this ! have a great day.

-wfz