A well-known brokerage firm executive claimed that 90% of investors are currently confident of meeting their investment goals. But you believe that the proportion of people who are confident is smaller than 90%, and decide to test your claim at the 0.05 significance level. Your survey, conducted over a two week period, found that in a sample of 200 people, 85% of them said they are confident of meeting their goals. The null and alternative hypothesis is: HA:p ≥ 0.9 HA:p < 0.9 The test statistic is: ____ (to two decimals) The p-value is: ____ (to four decimals)
A well-known brokerage firm executive claimed that 90% of investors are currently confident of meeting their investment goals. But you believe that the proportion of people who are confident is smaller than 90%, and decide to test your claim at the 0.05 significance level. Your survey, conducted over a two week period, found that in a sample of 200 people, 85% of them said they are confident of meeting their goals. The null and alternative hypothesis is: HA:p ≥ 0.9 HA:p < 0.9 The test statistic is: ____ (to two decimals) The p-value is: ____ (to four decimals)
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.CR: Chapter 13 Review
Problem 8CR
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A well-known brokerage firm executive claimed that 90% of investors are currently confident of meeting their investment goals.
But you believe that the proportion of people who are confident is smaller than 90%, and decide to test your claim at the 0.05 significance level.
Your survey, conducted over a two week period, found that in a sample of 200 people, 85% of them said they are confident of meeting their goals.
The null and alternative hypothesis is:
HA:p ≥ 0.9 HA:p < 0.9
The test statistic is: ____ (to two decimals)
The p-value is: ____ (to four decimals)
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