Question: Please help. I keep doing these wrong. A well-known brokerage firm executive claimed that 90% of investors are currently confident of meeting their investment goals.

Please help. I keep doing these wrong.

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, 87% 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 0.005 significance level. A)The null and alternative hypothesis would be:

H0:0.9 H1:>0.9
H0:p=0.9 H1:p<0.9
H0:p=0.9 H1:p>0.9
H0:0.9 H1:<0.9
H0:=0.9 H1:0.9
H0:p=0.9 H1:p0.9

B) The test is:

two-tailed left-tailed right-tailed C) The test statistic is: (to 3 decimals) D) The p-value is: (to 4 decimals) E) Based on this we:

Fail to reject the null hypothesis
Reject the null hypothesis

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

I keep getting these wrong. 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...

1.You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly more than 0.67. Thus you are performing a right-tailed test. Your sample data produce the test...

Hi, I need help with these questions. Thank you. The scores of 50 students are given below. 95 82 88 101 82 110 129 115 81 104 78 85 74 107 113 84 93 115 66 97 85 95 66 80 123 82 110 179 81 70 116 67...

I need help with the following questions 1: Hypothesis Test Test the claim that the proportion of men who own cats is smaller than 40% at the .10 significance level. The test is based on a sample of...

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...

0 Question 7 B 011 pt '0 3 8 98 G Details Testing: Hoip = 0.52 H12? 7/5 0.52 Your sample consists of 146 subjects, with 73 successes. Calculate the test statistic, rounded to 2 decimal places...

Provide a curved-arrow mechanism for each of the reactions in Fig. Pl1.73 that accounts for the stereochemical results. Show the structure of the unstable intermediate in each case and explain why it...

A large crate is placed on the bed of a truck but not tied down. (a) As the truck accelerates forward, the crate remains at rest relative to the truck. What force causes the crate to accelerate...

Question 9 The timing of your budget process depends on how much financial activity you have. how much financial discipline you need. how much financial data you generate. a . and b . a . , b . and c...

Jason and Camila Sims have two children, with ages of 6 years and 5 months. Their younger child, Julian, was born with a congenital heart defect that will require several major surgeries in the next...

Your company recently announced a new benefit. According to the announcement, the company will pay for expenses associated with taking job-related coursework or pursuing a program of study leading to...

Technology. Refer to Case

Because your companys educational benefit is new, you have several questions about what expenses are covered. Ideally, you would like the company to reimburse you for tuition, fees, books, meals,...