An administrator at a rural college claims that the proportion, p, if students who commute father than fifteen miles to school is more than 15%. To test this, she selects a random sample of 250 students at this college, and she finds that 49 commute farther than fifteen miles to school, is there enough evidence to support the administrator’s claim at the 0.10 level of significance? Perform a one-tailed test. Then complete the parts below. Carry you intermediate computations to three or more decimal places and round your answers as specified in the table.

Q: Strack, Martin, and Stepper (1988) reported that people rate cartoons as funnier when holding a pen…

A: The given sample size is 25, mean difference is 1.6 and SS is 150.

Q: A local college recently made the news by offering foreign language-speaking dorms to its students.…

A: Given observed frequency(O) table : Expected frequencies and Test statistics can be calculated as…

Q: A random sample of 105 students of University A showed that 12 were in favour of a new grading…

A: Given: Sample size (n1)=105Sample size (n2)=108x1=12x2=18α=0.01

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

A: Given that  P0 = 0.37  n=160

Q: An article in the Washington Post on March 16, 1993 stated that nearly 45 percent of all Americans…

A: The question is about hypo. testing Given : Randomly selected no. of students ( n ) = 82 No. of…

Q: A presidential of staff's club hired a public relations firm to conduct a poll to see whether he…

A:

Q: Only about 15% of all people can wiggle their ears. Is this percent higher for millionaires? Of the…

A: The p is the proportion of people who can wiggle their ear The hypothesized proportion  p=0.15 The…

Q: given as + Choose th

A: The margin of error is the amount of random sampling error in the results of a survey. The larger…

Q: In a survey, 36% of the respondents stated that they talk to their pets on the telephone. A…

A:

Q: Most grad schools require 1000 on GRE.  It's a composite score, with two parts (like SAT). Each part…

A:

Q: A psychologist claims that students are more attentive in classes taught by instructors rated as…

A: Given that  Based on the data given it is related to two sample proportion for hypothesis test The…

Q: Clinical trials involved treating flu symptons with a new medicine.  Among 1123 patients treated…

A: From the provided information, Sample size (n) = 1123 90 experienced a side effect of dizziness that…

Q: n 1971, there was a shift in attitudes, as Americans’ “ideal” family switched from four kids to two…

A: The median would stay the same as it is not affected by outliers   The mean would increase as it is…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: α=0.01 Sample size, n1=323 No. of people dream in black and white, x1=73 Sample size, n2=315 No. of…

Q: J 2 Prior to a special advertising campaign, 23% of all adults recognized a particular company’s…

A: From the provided information, 23% of all adults recognized a particular company’s logo. The claim…

Q: A software company is interested in improving customer satisfaction rate from the 60% currently…

A:

Q: Q: Bring the following hypothesis in a formula form: Women are not more motivated than man There is…

A: Hypothesis is an assumption that is being tested.

Q: Suppose that 75% of college students prefer pepperoni on their pizzas. You took a sample of ?=150 at…

A:

Q: torists do not have motor vehicle insurance. A random survey amongst 150 motorists found that 54 do…

A: A random survey amongst 150 motorists; n=150

Q: The table below summarizes the  results of a survey in which randomly selected people were asked how…

A: It is needed to test, whether the feelings on medical marijuana and gender are independent or not.

Q: 11% of all Americans suffer from sleep apnea. A researcher suspects that a lower percentage of those…

A: We have given that the hypothetical proportion p0=0.11, sample size n=317 and favourable number of…

Q: Would this be a t-test because the sample is less than 30?

A: From the given information, the population standard deviation is 2.

Q: A national survey of 1000 adult citizens of a nation found that 19% dreaded Valentine's Day. The…

A:

Q: In a CBS poll of 1289 adults, nationwide, asking whether they favor or oppose teacher and school…

A:

Q: A researcher investigated whether there was a relationship between the time spent being read to as a…

A: Aim is to checking whether there is a relationship between the time spent being read to as child and…

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Given : Mean = μ = 0.36  Level of significance = 0.05 p^ = xn    = 31118    = 0.2627

Q: On average, they report 6.6 hours a week going to parties, and the sample SD (or SD+) is 9 hours.…

A: Let  be the population mean number of hours a week going to parties.Given that,Population mean…

Q: Please answer number 13.

A: It is given that 43% had no children, 18% are had one child, 18% are have two children, 21% have…

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 236 women,…

A: From the provided information,

Q: The recidivism rate for convicted sex offenders is 8%. A warden suspects that this percent is…

A: Given,n=321x=22p^=xnp^=22321=0.0685α=0.01

Q: The recidivism rate for convicted sex offenders is 15%. A warden suspects that this percent is…

A: For this study we should use:Z-test. This is because we are dealing with proportions where z-test is…

Q: (Round to four decimal places as needed.) (e) Using the distribution from part (c), would it be…

A:

Q: Last year at a local country club, 60% of the golfers were “full members”, 30% were “junior…

A: Given: Observed values of a sample is as follows Full members 210 Junior members 100 Guests…

Q: Labor day was created by the U.S. labor movement over 100 years ago. In a recent Gallop Poll, 1010…

A: Solution

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: The recidivism rate for convicted sex offenders is 14%. A warden suspects that this percent is…

A: Given,n=359x=65P^=Xn=65359=0.181α=0.05H0: P =0.14H1: P>0.14

Q: Identify the null and alternative hypotheses for this test.

A: Test is that whether the percentage of females aged 15 and  older who live alone has changed from…

Q: Proctor & Gamble claims that at least half the bars of lvory soap they produce are 99.44% pure (or…

A:

Q: The mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor’s…

A:

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: There are two independent samples which are over 55 and under 25. We have to test whether the…

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.25…

A: Given,n=1908x=439p^=xnp^=4391908=0.2301

Q: A survey of 1195 CEOS finds that 717 believe the economy will improve next year. We are trying to…

A: We have given that,  Population proportion (p)= 66% = 0.66 and favorable cases (X) = 717 , sample…

Q: The claim that the proportion of accidental deaths of the ederly attribute to resident falls is more…

A: Hypotheses: The null and the alternative hypotheses are,  H0:p=0.20H1:p>0.20

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The value of p0 is 0.52 and the sample size n is 800.

Q: In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20…

A:

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.