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A well-known brokerage firm executive claimed that at least 32 % of investors are currently confident...

A well-known brokerage firm executive claimed that at least 32 % of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that out of 107 randomly selected people, 40 of them said they are confident of meeting their goals.

Suppose you are have the following null and alternative hypotheses for a test you are running:

H0:p=0.32
Ha:p<0.32

Calculate the test statistic, rounded to 3 decimal places

z=

Math   Statistics-And-Probability   
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total number of sample taken is 107

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