test the null hypothesis p=0.90 against the alternative hypothesis p<0.90 at 0.50 level of significance

Q: A well-known brokerage firm executive claimed that 80% of investors are currently confident of…

A: Claim:P&gt;0.08       α=0.005       n=500,  P∧=0.84

Q: A well-known brokerage firm executive claimed that 50% of investors are currently confident of…

A: The claim is that the proportion of people who are confident is smaller than 50%. That is, the…

Q: A manufacturer finds that in a random sample of 100 of its CD players, 96% have no defects. The…

A: The manufacturer wants to claim the smallest proportion of defects that will not be thrown into…

Q: Suppose a random sample of 110 companies taken in 2005 showed that 26 offered​ high-deductible…

A: Given Information: First sample: Sample size (n1) = 110 X = 26 offered high-deductible health…

Q: Recently a large academic medical center determined that 10 of 22 employees in a particular position…

A: Given, p=0.48  x=10 n=22 p^=xn=1022=0.454545

Q: A well-known brokerage firm executive claimed that 10% of investors are currently confident of…

A: Solution: Let n be the sample size. From the given information, p-hat = 0.18 and n = 800. The given…

Q: A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly…

A: Given information- Significance level, α = 0.01 We know that null hypothesis is general statement…

Q: Test the claim that the proportion of people who are confident is smaller than 90% at the 0.025…

A: A well-known brokerage firm executive claimed that 90% of investors are currently confident of…

Q: A well-known brokerage firm executive claimed that 60% of investors are currently confident of…

A:

Q: In the past, the mean running time for a certain type of flashlight battery has been 9.9 hours. The…

A: Type II error : Fail to reject H0 when H0 is false.

Q: A well-known brokerage firm executive claimed that 20% of investors are currently confident of…

A: Given,sample size(n)=300sample proportion(p^)=0.12α=0.025

Q: A well-known brokerage firm executive claimed that 80% of investors are currently confident of…

A:

Q: In a clinical trial, 20 out of 880 patients taking a prescription drug daily complained of flulike…

A: Given : n = 880 p = 0.019

Q: A well-known brokerage firm executive claimed that 20% of investors are currently confident of…

A: State the hypotheses. That is, there is no evidence to conclude that proportion of people who are…

Q: Recently, a large academic medical center determined that 7 of 15 employees in a particular position…

A:

Q: Recently, a large academic medical center determined that 17 of 24 employees in a particular…

A: given information: let us consider x: having a male empolyee at a perticular position. x=17 n=24…

Q: Based on this confidence interval, would you reject the null hypothesis or fail to reject the null…

A: here n =100 95% confidence Interval for difference  [$1769 , $4195]

Q: An online food delivery service in metro manila claims that the delivery time is not greater than 30…

A: Given,sample size(n)=29sample mean(x¯)=32standard deviation(s)=4α=0.05

Q: The manufacturer of a spot remover claims that hisproduct removes 90 percent of all spots. If, in a…

A: From the provided information, Sample size (n) = 200 Only 174 were removed with the manufacturer’s…

Q: An auto manufacturer claims that its new 4-cylinder Hybrid auto with manual shift averages 50 mpg…

A: Decision rule: Decision rule based on critical value approach: If test statistic ≤ ­­–t critical…

Q: A well-known brokerage firm executive claimed that 60% of investors are currently confident of…

A: Given that P =0.60 ,n =800 ,p^ = 0.58

Q: Test the claim that the proportion of people who are confident is larger than 30% at the 0.10…

A: Given : n=300 , p-hat=0.35 , p0=0.30 , α=0.10 We want to test the claim that the proportion of…

Q: In a clinical trial, 20 out of 880 patients taking a prescription drug daily complained of flulike…

A: Given : p = 0.019 n = 880

Q: A well-known brokerage firm executive claimed that 60% of investors are currently confident of…

A: From the provided information, Sample size (n) = 400 Sample proportion (p̂) = 0.52 Level of…

Q: A study was conducted simultaneously in two different communities in New York City to examine an…

A: p-value: A p-value is used to measure the probability to obtain the results and the assumption was…

Q: In a clinical trial, 29 out of 894 patients taking a prescription drug daily complained of flulike…

A: The lower and upper bound of the confidence interval is computed by p^±z(SE), where z depends on the…

Q: A well-known brokerage firm executive claimed that 10% of investors are currently confident of…

A: Test of Hypothesis : Null Hypothesis H0: μ≥0.1 Alternative Hypothesis H1: μ&lt;0.1

Q: A well-known brokerage firm executive claimed that 90% of investors are currently confident of…

A:

Q: A well-known brokerage firm executive claimed that 60% of investors are currently confident of…

A: Here, the claim of the test is that the proportion of people who are confident is larger than 60%.…

Q: well-known brokerage firm executive claimed that 40% of investors are currently confident of meeting…

A: Given that : P = 40%  n = 500 P^ = 35 % By using one sample proportion test . We solve this problem.…

Q: A well-known brokerage firm executive claimed that 10% of investors are currently confident of…

A: The null and the alternative hypotheses are, H0: p≥0.1 H1: p&lt;0.1 The test is left-tailed. The…

Q: An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 800…

A: It is known that if the p-value is less than the level of significance, the null hypothesis is…

Q: A large automobile insurance company selected samples of single and married male policyholders and…

A: Given Information :  A large automobile insurance company selected samples of single and married…

Q: Suppose 26 of 200 tires of brand A failed to last 30000 miles, whereas the corresponding figure for…

A: Given:

Q: In one study of smokers who tried to quit smoking with nicotine patch​ therapy, 38 were smoking one…

A: Given information No of people smoking x = 38 Total people n = 38 + 33 = 71

Q: A well-known brokerage firm executive claimed that 70% of investors are currently confident of…

A: From the provided information, Population proportion (p) = 0.70 Sample size (n) = 100 Sample…

Q: A well-known brokerage firm executive claimed that 10% of investors are currently confident of…

A: Denote p as the true population proportion of investors, who are confident.

Q: A well-known brokerage firm executive claimed that 80% of investors are currently confident of…

A: Given,sample size (n)=500sample proportion(p^)=0.75population proportion(P)=0.80α=0.10

Q: ll-known brokerage firm executive claimed that 90% of investors are currently confident of meeting…

A: The following null and alternative hypotheses need to be tested: Ho: p ≥ 0.90Ho:p≥0.90 Ha: p…

Q: The Genetics and IVF Institute conducted a clinical trial of the YSORT method designed to increase…

A: Given Information:  291 babies were born to parents using the YSORT method, and 239 of them were…

Q: A well-known brokerage firm executive claimed that 50% of investors are currently confident of…

A:

Q: A manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells,…

A: Given P=0.10 x=14 n=100

Q: In a clinical trial, 25 out of 869 patients taking a prescription drug daily complained of flulike…

A:

Q: A well-known brokerage firm executive claimed that 80% of investors are currently confident of…

A: We have given that Sample size n=400, sample proportion p^=0.72 , alternative claim H1:p&lt;0.8…

Q: a random sample of 16 women ( female (F)) , use their weights to test the null hypothesis that the…

A: The appropriate test for the data is One sample t test; H0 : The average weight of all the women on…

Q: A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly…

A:

Q: A well-known brokerage firm executive claimed that 50% of investors are currently confident of…

A: Given:

Q: A well-known brokerage firm executive claimed that 90% of investors are currently confident of…

A: