a. How many 18 to 29 year olds must be sampled to find at least 50 who invest in the stock market? b. How many people 65 years of age and older must be sampled to find at least 50 who invest in the stock market? c. If 1000 individuals are randomly sampled, what is the expected number of 18 to 29 year olds who invest in the stock market in this sample? What is the standard deviation of the number of 18 to 29 year olds who invest in the stock market? d. If 1000 individuals are randomly sampled, what is the expected number of those 65 and older who invest in the stock market in this sample? What is the standard deviation of the number of those 65 years of age and older who invest in the stock market?

a. How many 18 to 29 year olds must be sampled to find at least 50 who invest in the stock market? b. How many people 65 years of age and older must be sampled to find at least 50 who invest in the stock market? c. If 1000 individuals are randomly sampled, what is the expected number of 18 to 29 year olds who invest in the stock market in this sample? What is the standard deviation of the number of 18 to 29 year olds who invest in the stock market? d. If 1000 individuals are randomly sampled, what is the expected number of those 65 and older who invest in the stock market in this sample? What is the standard deviation of the number of those 65 years of age and older who invest in the stock market?

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Description: Textbook: Essentials of statistics for business and economics, 9th editionChapter 5, problem 65SE (investing in the stock market). Investing in the Stock Market. According to a 2017 Gallup survey,the percentage of individuals in the United States who

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Textbook: Essentials of statistics for business and economics, 9th edition

Chapter 5, problem 65SE (investing in the stock market).

Investing in the Stock Market. According to a 2017 Gallup survey,
the percentage of individuals in the United States who are
invested in the stock market by age is as shown in the following
table (Gallup website).
Percent of Individuals
Invested in Stock Market
Age Range
18 to 29
30 to 49
50 to 64
31
62
62
65+
54
Suppose Gallup wishes to complete a follow-up survey to find out
more about the specific type of stocks people in the United States
are purchasing.

a. How many 18 to 29 year olds must be sampled to find at
least 50 who invest in the stock market?
b. How many people 65 years of age and older must be
sampled to find at least 50 who invest in the stock market?
c. If 1000 individuals are randomly sampled, what is the
expected number of 18 to 29 year olds who invest in the
stock market in this sample? What is the standard deviation
of the number of 18 to 29 year olds who invest in the stock
market?
d. If 1000 individuals are randomly sampled, what is the
expected number of those 65 and older who invest in the
stock market in this sample? What is the standard deviation
of the number of those 65 years of age and older who invest
in the stock market?

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Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good barometer of the overall stock market. On January 31, 2006, 9 of the 30 stocks making up the DJIA increased in price (The Wall Street Journal, February 1, 2006). On the basis of this fact, a financial analyst claims we can assume that 30% of the stocks traded on the New York Stock Exchange (NYSE) went up the same day. A sample of 51 stocks traded on the NYSE that day showed that 22 went up. You are conducting a study to see if the proportion of stocks that went up is significantly more than 0.3. You use a significance level of a =0.05. = What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... O less than (or equal to) a O greater than a This test statistic leads to a decision to... O reject the null O accept the null O…