A company believes that it gains more than 30% of the total market share for ts products. To prove this belief, a random sample of 150 purchases of this product is contacted. In order to reject the null hypothesis at α= 0.05, out of 150 purchases, how many would need to purchase this company’s brand of the product

Q: If our critical region for a one-sided, left-tailed t-test is t 1.782 (b) t -1.782 (c) t 1.782 (d)…

A: We have ro identify two sided critical region.

Q: The test statistic of z=1.74 is obtained when testing the claim that p≠0.144. a. Identify the…

A:

Q: The probability of the data under the model of the alternative hypothesis (model 1) is 0.0008 and…

A:

Q: of n = 25 scores produces a t statistic of t = +2.052. If the researcher is conducting a…

A: Given: n=25 t=2.052

Q: A report by the Gallup Poll stated that on average a woman visits her physician 5.8 times a year. A…

A: (a) Here, the value of α is provided. Hence, the two possible answers are α is provided and Asks if…

Q: The designer of a new sheet metal stamping machine claims that their new machine can turn out a…

A: Standard Machine:  n1 = 9, x̄1 = 35.22 seconds, s1² = 24.4375 seconds² New Machine:  n2 = 9, x̄2 =…

Q: Suppose a group of 700 smokers (who all wanted to give up smoking) were randomly assigned to receive…

A: From the provided information,

Q: The test statistic of z=2.17 is obtained when testing the claim that p>0.5. a. Identify the…

A: From the provided information, The claim is p > 0.5 The hypotheses can be constructed as: H0: p =…

Q: A certain university claims that for the last school year the proportion of students who were not…

A: Given: Claim: The proportion of students who were not able to earn a college diploma is at most 25%…

Q: A company selling home furnaces claims that installingtheir new high efficiency furnace will “cut…

A: Here,the company claims that their new furnace has the ability to cut the heating bill in half.Let b…

Q: If the p value is > alpha , what does this mean ?  - it proves the Ho is true , with beta error…

A: If the p-value is less than or equal to the alpha (p< .05), then we reject the null hypothesis,…

Q: For a one tailed test evaluating a treatment that is supposed to decrease scores, a researcher…

A: The null and alternative hypotheses are;The null hypothesis states that the scores are unaffected by…

Q: A hypothesis test produces a t statistic of t=2.01.If the researcher is using a two tailed test with…

A: →Given that,  test  statistic for two tailed t‐test       t=2.01     significance  level=0.05     we…

Q: In a one-tail hypothesis test where you reject H0 only in the upper tail, what is the p-value if…

A: Concept of p-value: The p-value in hypothesis testing is the probability of obtaining a test…

Q: For conducting a​ two-tailed hypothesis test with a certain data​ set, using the smaller of n1-1 and…

A: Given : Here, By conservative method df = 11 Corresponding critical value is : t=±2.201 By Formula…

Q: researcher expects that a newly developed shoe used by a sample of n = 6 individuals will reduce…

A:

Q: l study, a random sample of 540 participants agree to have their blood drawn, which is to be…

A: The random variable  X which represents the number of samples out of the 10 who have these…

Q: A decade-old study found that the proportion of high school seniors who felt that "getting rich" was…

A: Given thatA decade-old study found that the proportion of high school seniors who felt that "Getting…

Q: A hypothesis test produces a t statistic of t = +2.19. If the researcher is conducting a two-tailed…

A: Given information- We have given two-tailed test statistics. The value of the t statistics = +2.19…

Q: 2. A random sample of n = 25 is obtained from a population with variance o², and the sample mean is…

A: Given, n = 25 μ = 80 σ2 = 600 σ = 24.4949 X-bar = 70 Null and alternative hypothesis: H0: μ = 80 Vs…

Q: The Tippie College of Business obtained the following results on the salaries of a recent graduating…

A: we have given that  n1=105 ,n2=30 ,xbar1=48988 ,xbar2=55448 ,s1=19500 ,s2=12500

Q: Find the Type II error given that the null hypothesis, H0, is: there are no more than 15% of…

A: Introduction: Type I error: Type-I error is rejecting the null hypothesis H0, when the null…

Q: In a random sample, 12 of 14 industrial accidents weredue to unsafe working conditions. Use the 0.01…

A:

Q: An independent-measures research study uses two samples, each with n = 15 participants. If the data…

A:

Q: The test statistic of z=2.19 is obtained when testing the claim that p>0.1. a. Identify the…

A: The test statistic is 2.19.

Q: A researcher claims that 90% of all the residents on a certain barangay easily believes on rumors. A…

A: Given : n=569 P=0.90 Sample proportion =499/569

Q: A hypothesis test is conducted with H0:μ=55H0:μ=55 and H1:μ<55H1:μ<55. A simple random sample of…

A:

Q: A researcher wants to test the null hypothesis H; p = 0.79 against the alternative H; p>0.79. A…

A: Since, you have asked multiple question, we will solve the first question for you. If you want any…

Q: Random samples of 900 people in the United States and in Great Britain indicated that 60% of the…

A: A hypothesis test can be used to compare the proportion of two independent population. The…

Q: If the hypothesis test results in a p-value of 0.08, would we be able to reject the null hypothesis…

A: Given,p-value =0.08α=0.05

Q: A sample of 9 measurements, randomly selected from a normally distributed population, resulted in…

A: From the provided information, Sample size (n) = 9 Sample mean (x̅) = 2.6 Sample standard deviation…

Q: The designer of a new sheet metal stamping machine claims that their new machine can turn out a…

A:

Q: A simple random sample of size n=14 is obtained from a population with μ=67 and σ=19.   Assuming…

A: From the given information, Consider,  Sample size (n) = 14 Population with μ=67 and σ=19. Thus,

Q: A news station reports that 60% of the people in a certain community are in favor of requiring masks…

A:

Q: A lot of people have difficulty in getting good sleep of more than 7 hours per day. An investigator…

A: Solution: From the given information, n=25,

Q: For a two-tailed hypothesis test with α = .05 and a sample of n = 16, the boundaries for the…

A:

Q: trials resulted in 18 successes. List the null and alternate hypothesis if you were to test the…

A: Consider "p" be the population proportion for which the hypothesis testing need to be conducted.…

Q: 3) A certain country claims that their COVID-19 vaccine is more than 80% effective. In their…

A: The null hypothesis is H0: p = 0.80, and the alternative hypothesis is Hα:p&gt;0.80

Q: YMCA has a new swimming instructor (Teacher 1) is being evaluated by how many of his students pass a…

A: Define p1, p2 as the true population proportions of students pass a standard swimming test, whose…

Q: f a hypothesis test using a sample of n = 16 scores produces a t statistic of t = 2.15, then the…

A: It is given that in a hypothesis testing problem, we have a Sample size, n= 16, the value of the…

Q: A sample of n = 25 scores produces a t statistic of t = +2.052. If the researcher is conducting a…

A: Sample size, n = 25 t statistic = +2.052 Given that two tailed hypothesis test.

Q: 1. Write out the Z-test formula 2. In 1-2 sentences, what is the difference between a one-tailed and…

A: As per Bartleby guideline expert have to answer first question three subpart only dear student…

Q: The Tippie College of Business obtained the following results on the salaries of a recent graduating…

A: we have given that  n1=105 ,n2=30 , xbar1=48988 ,xbar2=55448 and s1=19500 ,n2=12500 ,alpha =0.05

Q: For a one-tailed hypothesis test with α = .01 and a sample of n = 28 scores, the critical t value is…

A:

Q: A study claims that over 25% of those who suffer from osteoarthritis receive measurable relief from…

A: Solution-: Given: n=8 We shall not reject the null hypothesis is  We want to evaluate (a) α,…

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

A:

Q: The test statistic of z = 0.96 is obtained when testing the claim that p &gt; 0.4. a. Identify the…

A: a.The test statistic value of z is 0.96 and also the given claim is p&gt;0.4.

Q: In a clinical​ trial, 29 out of 853 patients taking a prescription drug daily complained of…

A: Claim : more than 2.9​% of this​ drug's users experience flulike symptoms as a side effect

Q: Suppose a group of 800800 smokers (who all wanted to give up smoking) were randomly assigned to…

A: Given: n1=594x1=272n2=206x2=92n=800 The value of p^1 is obtained below; p^1=x1n1=272594=0.4579 The…