A brokerage firm is curious about the proportion of clients who have high-risk stocks in their stock portfolio. Let the proportion of clients who have high-risk stocks be p. If the brokerage firm wants to know if the proportion of clients who have high-risk stocks is less than 15%, what are the null and alternative hypotheses?

Q: are conducting a study to see if the proportion of voters who prefer Candidate A is significantly…

A: In hypothesis testing, a null hypothesis can be defined as the hypothesis of no difference or…

Q: In the case of hypothesis testing of one sample (for large samples): If α value is greater than the…

A: In the case of hypothesis testing of one sample (for large samples) Here use basic concept of…

Q: Suppose that you conduct a hypothesis test for a proportion using a sample size of n=50 and you…

A: Answer: As sample increases  the p-value decreases.

Q: The executives at Sandbachian, inc., having recently solved their widget crisis, have another…

A: Let ‘x’ be the no of defective manhole covers i.e x=40 and n=800 sample propotion (P)=x/n p=40/800…

Q: A finance blogger is writing an article about credit card use. As they write their article, the…

A: If P-value ≤ α, reject H0. If P-value > α, do not reject H0.

Q: About 10% of the human population Is left-handed. Suppose a researcher speculates that artists are…

A: Solution: n= 150 Sample size of artist  x= 18 artist are left handed  p^=xn=18150=0.12  Sample…

Q: achieved it - would tell us that the chance of our results being dueto chance in the sample rather…

A: The p value 0.1 indicates that the chance of our results being due to chance in the sample rather…

Q: Last year, 46% of business owners gave a holiday gift to their employees. A survey of business…

A:

Q: A financial advisor believes that the proportion of investors who are risk-averse (that is, try to…

A:

Q: To determine if people prefer this year's school start time over last year's school start time, WCS…

A: From the above data

Q: It is a known fact that 50% of all Americans are male. A researcher wants to see if the percent of…

A:

Q: A union’s executive conducted a survey of its members to determine what the members felt the…

A: Let A be the random variable denoting that job security was an important issue.Let B be the random…

Q: Is there any pros and cons in solving for the population parameter rather than the sample…

A: Yes, there are pros and cons in solving for the population parameter rather than the sample…

Q: Do the states that voted for McCain have a different average percent of heavy drinkers than the…

A: 1. A study is conducted to determine whether McCain states and Obama states have different average…

Q: What is the sample proportion such that 95% of all others is symmetric around 36%?

A: 1. A sample of 200 students is taken in which 36% of all college students use an Apple i phone only.…

Q: Suppose we want to test the claim that  the proportion of Californians who prefer single-family home…

A: From the given information,   Claim: Suppose we want to test the claim that  the proportion of…

Q: ​If other factors are held constant, the larger the difference between the two sample means, the…

A: We have to find given statement true or false

Q: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

A:

Q: 4. Suppose a political candidate claims the percentage of uninsured drivers is 30 percent, but you…

A: Rule of hypothesis : Null Hypothesis contain 'less than or equal to ( <= )' , 'greater than or…

Q: Consider testing the hypothesis H0: μ = 100 vs. Ha: μ ≠ 100. If the value of the test statistic is…

A: we have hypothesis is H0;μ=100                                         H1:μ≠100from the alternative…

Q: Suppose that a scientist is interested in determining if the proportion of females who prefer Diet…

A: Two sample Z test of proportions is the test to determine whether the two populations differ…

Q: We want to test if the percentage of cash users in purchases is greater than 30. Determine the…

A: The hypothesized proportion is 0.30.

Q: The death rate per 100,000 for lung cancer is 7 among non-smokers and 71 among smokers. The death…

A: Given Information: The death rate per 100,000 for lung cancer is 7 among non-smokers and 71 among…

Q: What are the degrees of freedom for the contingency table provided? And if x2 =16, what might you…

A: The number of rows is 2 and the number of columns is 2.

Q: An exercise science student believes that during professional rugby games the average distance…

A: Provided that : When reviewing game statistics the student found that the average distance covered…

Q: In a smaller animal shelter, 12 cats and 5 dogs are being accommodated. Table below shows age group…

A: Given : n1 = no of dogs in the sample n1 = 5 n2 = no of cats in the sample n2 = 12 x1 = no of old…

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: given  P0 =0.37 n=170

Q: A polling organization announces that the proportion of American voters who favor congressional term…

A: Given  Margin of error=0.03, p=64%=0.64, level of significance=0.05

Q: Members of the city council want to know if a majority of city residents supports a 1% increase in…

A: Since the value p-value is significantly large P-value=0.18 hence we will not be able reject the…

Q: To investigate whether one-pound bags of potato chips actually contain a full pound of chips, a…

A: Testing of Hypothesis: Testing of hypothesis is a rule which, when the sample values have been…

Q: In the recent census, three percent of the U.S. population reported being two or more races.…

A: From the given information, Consider, p1= The Proportion of North Dakotans who are reported being of…

Q: contingent’s survey, would you agree with the Newsweek poll? Perform a hypothesis test, using the…

A: Given data number of success , x= 2 sample size, n =76 population proportion,p= 0.13…

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: Given: x = 54n=160p^=xn=54160=0.3375α=0.01 The test hypothesis are, H0: p = 0.37 H1: p < 0.37.…

Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: Given,n=240x=104p^ =xn p^ =104240 p^ =0.4333H0 :P=0.45H1 : P<0.45α=0.01

Q: If the population proportion is 0.7 . A researcher wants the margin of error to be 0.20 and the…

A: Given  pcap=0.7, Zcritical=1.96 at alpha=0.05 MOE=0.20

Q: A public opinion pollster wants to estimate the percentage of voters who favor an upcoming proposal.…

A:

Q: General Motors wants to know if a newly designed car has a different appeal to people under 30…

A: Given data  General motors wants to know if a newly designed car has a different appeal to people…

Q: Can it be concluded that the percentage today is less than 76% if a=0.01?

A: 76% of Americans said they would prefer to purchase an American automobile.  Random sample of 56…

Q: If the p-value is less than or equal to a ,we reject the alternative * (hypothesis (p s a True False

A: We have to identify given statement is true or false?

Q: It is a known fact that 50% of all Americans are male. A researcher wants to see if the percent of…

A: 1) Answer is true, since comparing two proportions.

Q: A psychologist claims that more than 5.8 percent of the population suffers from professional…

A: Alternate Hypothesis is the hypothesis claimed by the researcher   Therefore, H1: p>5.8%

Q: Last year, the proportion of tax filers that received a refund was 25%. An accountant believes this…

A: For the given data what is the accountant's claim?

Q: A hospital director is told that 79%79% of the emergency room visitors are insured.  The director…

A:

Q: A study found that 13% of Americans have seen or sensed the presence of an angel. A contingent…

A:

Q: Camille believes that 50% of first-time brides in the United States are younger than their grooms.…

A:

Q: What is the appropriate alternative hypotheses? Denote p as the proportion of toast landing buttered…

A: Given,claim : the toast to land buttered side down morethan 50% of the time.

Q: suppose you select a simple random sample of 75 douglas college student and you find that 8 are left…

A: It is given that the sample size n is 75 and x is 8.

Q: A radio talk show asks listeners to call in and say whom they are going to vote for in the next…

A: According to the provided information, a radio talk show asks listeners to call in and say whom they…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.