A well-known brokerage firm executive claimed that at least 24 % of investors are currently confident...

A well-known brokerage firm executive claimed that at least 24 % 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 144 randomly selected people, 42 of them said they are confident of meeting their goals.

Perform a hypothesis test. Cleary label and show all four steps.

Expert Solution

milcah answered 1 year ago

A well-known brokerage firm executive claimed that at least 90% of investors are currently confident of...

A well-known brokerage firm executive claimed that at least 90% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 800 people, 88% of them said they are confident of meeting their goals. 1. If you were a broker for this well know brokerage firm which significance level do you want the statistician to use and why? (Answer as a complete sentence) 2....

A well known brokerage firm executive claimed that at least 55% of investors are currently confident...

A well known brokerage firm executive claimed that at least 55% 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 85 randomly selected people, 49 of them said they are confident of their goals.

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 122 randomly selected people, 38 of them said they are confident of meeting their goals. Suppose you have the following null and alternative hypotheses for a test you are running: H0:p=0.32H0:p=0.32 Ha:p≠0.32Ha:p≠0.32 Calculate the test statistic, rounded to 3 decimal places z=

A well-known brokerage firm executive claimed that 20% of investors are currently confident of meeting their...

A well-known brokerage firm executive claimed that 20% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 500 people, 12% of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is smaller than 20% at the 0.01 significance level. The null and alternative hypothesis would be: The test statistic is: (to...

A well-known brokerage firm executive claimed that 50% of investors are currently confident of meeting their...

A well-known brokerage firm executive claimed that 50% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 300 people, 49% of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is smaller than 50% at the 0.005 significance level: 1. The test statistic is: (to 3 decimals) 2. The p-value is: (to 4...

A well-known brokerage firm executive claimed that 70% of investors are currently confident of meeting their...

A well-known brokerage firm executive claimed that 70% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 800 people, 67% of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is smaller than 70% at the 0.005 significance level. The null and alternative hypothesis would be: H0:p≥0.7H0:p≥0.7 H1:p<0.7H1:p<0.7 H0:μ=0.7H0:μ=0.7 H1:μ≠0.7H1:μ≠0.7 H0:μ≥0.7H0:μ≥0.7...

A well-known brokerage firm executive claimed that 40% of investors are currently confident of meeting their...

A well-known brokerage firm executive claimed that 40% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 700 people, 42% of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is larger than 40% at the 0.025 significance level. The null and alternative hypothesis would be: H0:μ≥0.4H0:μ≥0.4 H1:μ<0.4H1:μ<0.4 H0:μ≤0.4H0:μ≤0.4 H1:μ>0.4H1:μ>0.4 H0:μ=0.4H0:μ=0.4...

A well-known brokerage firm executive claimed that 90% of investors are currently confident of meeting their...

A well-known brokerage firm executive claimed that 90% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 800 people, 82% of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is smaller than 90% at the 0.01 significance level. The null and alternative hypothesis would be: H0:μ=0.9H0:μ=0.9 H1:μ≠0.9H1:μ≠0.9 H0:p≤0.9H0:p≤0.9 H1:p>0.9H1:p>0.9 H0:μ≤0.9H0:μ≤0.9...

1 A well-known brokerage firm executive claimed that 40% of investors are currently confident of meeting...

1 A well-known brokerage firm executive claimed that 40% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 100 people, 37% of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is smaller than 40% at the 0.10 significance level. The null and alternative hypothesis would be: H0:μ=0.4 H1:μ≠0.4 H0:p≥0.4 H1:p<0.4...

1) A well-known brokerage firm executive claimed that 30% of investors are currently confident of meeting...

1) A well-known brokerage firm executive claimed that 30% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 300 people, 34% of them said they are confident of meeting their goals. Test the claim that the proportion of people who are confident is larger than 30% at the 0.10 significance level. a) The null and alternative hypothesis would be: H0:p≤0.3 H1:p>0.3 H0:p=0.3...

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