A recent study at a local college claimed that the proportion,  p , of students who commute more than fifteen miles to school is no more than  20% . If a random sample of  250  students at this college is selected, and it is found that  51  commute more than fifteen miles to school, can we reject the college's claim at the  0.05  level of significance? Perform a one-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table.

Q: To evaluate the effect of a treatment, a sample of n = 8 is obtained from a population with a mean…

A: Given: Sample size=n=8, population mean=μ=50 and sample mean=x¯=55.

Q: An independent consumer group states that, among all people with depression who use a new…

A: The claim is that the proportion of people who find relief from depression is 0.65. Given: Sample…

Q: A hospital claims that the proportion, p, of full-term babies born in their hospital that weigh more…

A: Given that, Sample size of babies born n=145 Sample proportion of babies who weighed over 7 pounds…

Q: The proportion p of residents in a community who recycle has traditionally been 70%. A policy maker…

A: p denotes the population proportion of residents in a community who recycle. Given that…

Q: (b) Based on the results obtained from EXCEL output, perform the hypothesis using the different…

A: Anova is the measure of parametric test. It test the mean significance between the groups. It…

Q: A researcher is using a two-tailed hypothesis test with α = 0.01 to evaluate the effect of a…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: For the problem below-Use .05 2-tailed alpha level. State null and alternative hypotheses. Report…

A: The data is given as : To check: mean of the individual motivation on performance is equal to the…

Q: Consider a study where students are measured on whether they had an internship during their time at…

A: The chi square test is used to find whether there is an association between the categorical…

Q: I have a z statistic of 2.91 from a one tailed test. What is my p value?

A: P(z>2.91 )=? P(z>2.91)= 1 - P(z<2.91) From z table the critical value at 2.91 is 0.9982…

Q: A recent study at a local college claimed that the proportion,  p, of students who commute more than…

A: The claim is that the proportion of students who commute more than fifteen miles to school is less…

Q: A recent study at a local college claimed that the proportion, p, of students who commute more than…

A: The hypotheses are given below: Null hypothesis: H0:p=0.25 Alternative hypothesis: H1:p<0.25.…

Q: Each day for 200 days, a quality engineer samples 144 fuses rated at 15 A and measures the amperage…

A: The hypotheses are: H0:μ=15versus H1:μ≠15. For each day, the probability of rejecting the null…

Q: In a study to estimate the proportion of residents in a city that support the construction of a new…

A: Let p be the proportion of residents in a city that support the construction of new bypass road in…

Q: recent study at a local college claimed that the proportion,  p , of students who commute more than…

A:

Q: A psychologist specializing in marriage counseling claims that, among all married couples, the…

A: Solution: Given information: n= 245 Sample size of  married couple x= 180 married couple stayed…

Q: A sample of 1600 computer chips revealed that 42 % of the chips do not fail in the first 1000 hours…

A: Given : population proportion , p = 39 % = 0.39

Q: In a clinical trial, 17 out of 830 patients taking a prescription drug daily complained of flulike…

A:

Q: A recent study at a local college claimed that the proportion,  p , of students who commute more…

A:

Q: To evaluate the effect of a treatment, a sample of n = 8 is obtained from a population with a mean…

A: It is required to test if the population mean is same as before (=40) or not, after the treatment.…

Q: In the past, the mean running time for a certain type of radio battery has been 9.6 hours. The…

A: Hypothesis testing plays a major role in research and development. To diagnose the underlying cause…

Q: At the 0.05 level of significance, is there enough evidence to reject Ho and support the claim of…

A: Test is that whether a new Javelin model will help increase the throw length.

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: A recent study at a local college claimed that the proportion, p, of students who commute more than…

A: The hypotheses for the test are given below.

Q: An independent consumer group states that, among all people with depression who use a new…

A: From the provided information, Sample size (n) = 200 Out of which 124 find relief from depression.…

Q: On analyzing 240 months of data for a particular asset class, you calculate that the returns have a…

A:

Q: A toy manufacturer claims that the mean time that its top-selling toy captures children's attention…

A: Null Hypothesis: It is the opposite of the alternate hypothesis   Alternate Hypothesis: It is the…

Q: A hospital claims that the proportion,p , of full-term babies born in their hospital that weigh more…

A: Given information- Sample size, n = 135 Significance level, α = 0.1 We have given that in a random…

Q: One sample has n = 17 with SS = 1646, and a second sample has n = 17 with SS = 1710. If the sample…

A:

Q: An alpha level of 0.05 means that 99% of the means are likely to reflect the null hypothesis.  True…

A:

Q: A tax accountant would like to test the claim that the proportion of individuals who owe when filing…

A: From the given information,  α=0.005.   Null Hypothesis:    H0: µ ≥0   Alternate Hypothesis:   Ha:…

Q: If a previous researcher had predicted a population mean of 10 casual friends per person, could that…

A: Null Hypothesis:    H0: µ =10.   That is,   Alternate Hypothesis:   Ha: µ≠10   That is, the…

Q: A psychologist specializing in marriage counseling claims that, among all married couples, the…

A: From the given information, the test statistic value is -0.934. Test: left tail test p=Pz<-0.934…

Q: A researcher obtains t= 2.25 for a repeated-measures study using a sample ofn=10 participants. Based…

A: It is given that t= 2.25. Df = n- 1 = 10-1 = 9.   For α = 0.05: It is given that α = 0.05, the area…

Q: To evaluate the effect of a treatment, a sample of  n = 8 is obtained from a population with a mean…

A: 1. The null and alternative hypothesis are given by : Ho : μ=50H1 :  μ≠50 The test statistics is…

Q: A recent study at a local college claimed that the proportion,  p , of students who commute more…

A: Denote p as the true proportion of the students who commute more than 15 miles to school. The claim…

Q: of LO %24 2. Based on their records, a hospital claims that the proportion, p, of full-term babies…

A: For the given data Perform z test for one proportion test

Q: A manufacturer of children's vitamins claims that its vitamins are mixed so that ecach batch has…

A:

Q: A hospital claims that the proportion, p, of full-term babies born in their hospital that weigh more…

A: The sample proportion is obtained below: From the given information, sample of 210 babies born in…

Q: Recently, the annual number of driver deaths per 100,000 for the selected age groups was as follows:…

A: The given data set is: The level of significance (L) is 0.05. To test the prediction is significant…

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

A: Given: A manufacturer of chocolate chips would like to know whether it's bag filling machine works…

Q: In manufacturing processes, it is of interest to know with confidence the proportion of defective…

A: State the hypotheses. That is, there is no evidence that the proportion of the defective parts is…

Q: The proportion p of residents in a community who recycle has traditionally been 60%. A policy maker…

A: Given,n=210x=120p^=xnp^=120210p^=0.5714α=0.10

Q: A hospital claims that the proportion,p, of full-term babies born in their hospital that weigh more…

A: Given:  Sample size, n = 145             Sample proportion, p^ = 73/145 = 0.50  To test the…

Q: To evaluate the effect of a treatment, a sample of n = 8 is obtained from a population with a mean…

A: Givensample size n = 8mean = 40sample mean M = 35 a)sample variance is 32sample standard deviation =…

Q: A recent study at a local college claimed that the proportion,  p , of students who commute more…

A: State the hypotheses. That is, there is no evidence that the proportion, of students who commute…

Q: A hospital daims that the proportion, P, of full-term babies born in their hospital that weigh more…

A: State the hypotheses. That is, the proportion of full term babies born in their hospital that weigh…

Q: A DJI drone builder states in their terms of conditions that the battery for their foldable drone…

A: Given Data: x¯=4.2n=10s=0.4   Null and Alternate hypothesis: H0: μ=4Ha: μ>4

Q: A random sample of 663 teens who said they did not typically eat fast food reported an average daily…

A: The conditions for conducting hypothesis test are, The samples must be drawn randomly. Each of the…

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.