Suppose tne null nype the cond Dased on the results of the test Six years ago, 12.9% of registered births were to teenage mothers. A sociologist believes that the percentage has decreased since then. Which of the following is the correct conclusion? O A. There is sufficient evidence to conclude that the percentage of teenage mothers has decreased. O B. There is sufficient evidence to conclude that the percentage of teenage mothers has remained the same. OC. There is not sufficient evidence to conclude that the percentage of teenage mothers has remained the same. O D. There is not sufficient evidence to conclude that the percentage of teenage mothers has decreased.

Q: A human society claims that less than 35% of households own a dog or a cat. In a random sample of…

A:

Q: A hypothesis test was conducted, at α = 0.05, to determine whether a certain chemical compound lasts…

A: Population mean , µ = 30 seconds. Sample mean , x̅ = 37.4 seconds. Sample size , n = 80. The…

Q: A new insecticide is advertised to kill more than 95% roaches upon contact.  In a laboratory test,…

A: From the provided information, level of significance (α) = 0.05 Sample size (n) = 400 Out of which…

Q: A hospital administrator claims that the proportion of knee surgeries that are successful is 87%. To…

A: The provided information are:Sample size (n) = 450Hypothesised proportion (po)=0.87From the provided…

Q: A research center claims that 30% of adults in a certain country would travel into space on a…

A: Givensample size(n)=800p^=0.34α=0.01

Q: A hypothesis test was conducted to investigate whether the population proportion of students at a…

A:

Q: If N is held at a constant size, which of the following tests is usually the most sensitive,…

A: It is given that the there is large variability between subjects.

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

A: Given data, p=71% =0.71   State Null and Alternative hypothesis.

Q: Members of the millennial generation are continuing to be dependent on their parents(either living…

A:

Q: A manufacturer of balloons claims that p, the proportion of its balloons that burst when inflated to…

A: Hypothesis is a statement, there are two types of statements. They are null hypothesis and alternate…

Q: Members of the millennial generation are continuing to be dependent on their parents(either living…

A: From the provided information, The claim that, the proportion of millennials continuing to be…

Q: n a sample of 120 children selected randomly from one town, it is found that 18 of them suffer from…

A: Given: The hypothesis for the proportion of children different from asthma is different from 13%.

Q: An airline claims that the no-show rate for passengers is less than 8%. In a sample of 416 randomly…

A: Given X=17 n=416

Q: A simple random sample of 100 flights of a large airline (call this Airline 1) showed that 64 were…

A: We have given that  favourable cases, X1 = 64 favourable cases, X2 = 80 Sample size, n1 = 100 = n2

Q: Members of the millennial generation are continuing to be dependent on their parents(either living…

A: a. Here, the claim is that the population proportion of millennials continuing to be dependent on…

Q: A test of H0H0:μ=1:μ=1 against HaHa:μ>1:μ>1 has test statistic zz = 1.74. Answer "Yes/Y" or "No/N"…

A: H0: μ=1H1: μ>1 Test Statistic, z=1.74

Q: When the following hypotheses are being tested at 5% level with o known Ho: H 2 11 H1:µ 1.96 or, <…

A: The null and alternate hypothesis are H0 : μ≥11HA : μ&lt;11 It has been given that the population…

Q: Consider the following hypotheses: Ho: µ = 18 Hai H # 18 If the test statistic is z = - 2.23, what…

A:

Q: An SRS of 45 male employees at a large company found that 36 felt that the company was supportive of…

A: Hypothesis testing  Hypothesis testing is conducted for the parameters of the population like…

Q: ied out by John claims that the average cost of living for households in City 1 is more than that in…

A: Given information: X1¯=164  X2¯=159σ1=12.5 σ2=9.25n1=35 n2=30  In this case, a test is required…

Q: An SRS of 45 male employees at a large company found that 36 felt that the company was supportive of…

A: we have to find conclusion for hypothesis...

Q: 2. A new insecticide laboratory test, the immediately after contact. Is this sufficient evidence to…

A: Given that P =0.95,n=400,x =384,α=0.05

Q: A sample of n = 200 college students is asked if they believe in extraterrestrial life and 120 of…

A: Two tailed p-value is   P-value =2× one tailed p-value

Q: A cell phone salesperson selects a random sample of 75 customers. For each customer, he records…

A: We want to tell you hypothesis

Q: A law enforcement agent hypothesizes that more than 25% of the drivers stopped on Saturday nights…

A: Solution: State the hypotheses Null hypothesis: H0: p≤0.25 Alternative hypothesis: Ha: p&gt;0.25 Let…

Q: In a random sample of 80 Americans, 55% wished that they were rich.  In a random sample of 100…

A: Correct option: Option 1

Q: A test of the hypotheses Ho: u = 15 versus H.; p> 15 conducted using a sample of size 7. The test…

A: Given that  H0:μ=15  Vs  H1:μ&gt;15 Sample size=7 , Test statistics=t=1.935

Q: From previous studies, it is concluded that 60% of phone numbers in a certain city are unlisted. A…

A:

Q: When the following hypotheses are being tested at 5% level with o known Họ: U 2 11 H1:P 1.645 O b. >…

A: To test:H0:μ≥11H1:μ&lt;11 So, the test is left tailed.

Q: Consider the following null and alternative hypotheses for testing whether the average GPA of…

A: Type I error : Type I error occurs when we reject true null hypothesis. Type II error : Type II…

Q: 2. A new insecticide laboratory test, the immediately after contact. is advertised to kill more than…

A:

Q: null and alternative hypotheses to be used in testing the following claims also explain type of…

A: Concept: The null hypothesis is the hypothesis of no difference or equality, while the alternative…

Q: For a two tailed test in which a treatment is supposed to change a scores, a researcher obtains…

A: Solution Given data is  test statistic = t = 2.06 df = 15 Alpha = a= 0.01 Test is two tailed .

Q: From previous studies, it is concluded that 34% of workers got their job through internet resume…

A: Given: n = sample size = 100 x = number of workers who got their job through resume sites = 72 p =…

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

A: Given,   Claim: Suppose that we have reason to believe that this proportion has changed, and we wish…

Q: The following are the average grade of a sample of 20 Senior High School students for the first…

A: Givenclaim isThe average grade of the students is Less than 90sample size(n)=20

Q: A researcher at IHK was interested in finding out the validity of this claim. On a designated…

A: mean = ∑xn = 187.85 =37.56 standard deviation = ∑(xi-x)2n-1 = 1.318

Q: A sample of n = 25 scores produces a t statistic of t -2.09. If the researcher is %3D which of the…

A: Let xi;(i=1,2,...,n) be the random sample of size n from the normal population with mean μ and…

Q: Suppose that we reject a null hypothesis at the 0.05 level of significance. Then for which of the…

A: Given data: Level Of significance = 0.05 To find: for which alpha values, we also reject the null…

Q: In a sample of 40 people 65% are black. Test the null hypothesis that the population proportion of…

A:

Q: To test the hypothesis H0: π = .0125 using n = 160, it is safe to assume normality of p.   True or…

A: Solution: From the given information, H0: π=0.0125 and n=160.

Q: Which of the following statements is true? o Rolling a fair die 6,000 times probably results in a…

A: Multiple choice question

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: In testing the hypotheses H 0 : p = 0.50 H0:p=0.50 versus H A : p ≠ 0.50 HA:p≠0.50 , a sample of 100…

A: It is a two tailed test.

Q: would you favor spending more federal tax meney eon the arts? of a random sample of n, 237 women,r…

A:

Q: You wish to test the following claim (Ha) at a significance level of a 0.10. H.:p = 0.44 Ha:p < 0.44…

A: Hypothesis : H0 : p = 0.44 Ha : p &lt; 0.44 significance level ( α ) = 0.10 X = 183 n = 488 sample…

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

A: Given :

Q: without school-aged children that would support starting the school year a week earlier. The P-value…

A: It is given that P-value = 0.000034 Level of significance = 0.05

Q: Which of the three p-values below provides the most evidence against H0?  A)   p-value = 0.411…

A:

Q: A local baker is interested if there is an association between the type of bread customers purchase…

A: We want tell you hypothesis

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.