What is the value of the degrees of freedom to be used to test this hypothesis?

Q: A psychologist was interested in the effects of time of day on critical thinking. Participants were…

A: Given Information: Participants were randomly assigned to one of three groups (Morning, Afternoon,…

Q: 2.  In a simple random survey of 89 teachers of high school AP Statistics, 73 said that it was the…

A: The sample size is 89 in which 73 said that it was the most satisfying, most enjoyable course they…

Q: 6. A hypothesis test is designed to test the claim that that less than 12 per cent of people in…

A:

Q: 4. You conduct a survey of 16 random students at the Trafalgar campus of Sheridan College. Among…

A: We have to answer questions based on confidence interval for the proportions.

Q: = Guestion Heip In a survey, 43% of the respondents stated that they talk to their pets on the…

A: Given that, Sample size n=160 Sample proportion of pet owners who spoke to their pets on telephone…

Q: 5. If other factors are held constant, the larger the difference between the two sample means, the…

A: If other factors are held constant, the larger the difference between the two sample means, the…

Q: A past survey of 1,068,000 students taking a standardized test revealed that 9.6% of the students…

A: Given Information: Sample size (n1) = 1,068,000 Sample proportion (p^1) = 9.6% = 0.096 Sample size…

Q: 39. A polling agency reported that 66 percent of adults living in the United States were satisfied…

A: From the provided information, Population proportion (p) = 0.66 Sample size (n) = 1542 Confidence…

Q: What is the confidence interval 74.7%<p<86.9%74.7%<p<86.9% in the form of ˆp±MEp^±ME?

A: Given the confidence interval = (74.7%, 86.9%) Point estimate is:  p^=lower confidence limit+upper…

Q: a. Is this a Purposive or Naturalistic study? b. State the appropriate hypotheses and test. State…

A: Solution:

Q: Based on past experience, a hiring manager believes that less than one-third of applicants are…

A:

Q: a survey of 1083 people, 585 answered "yes" to a particular question. Construct a 90% confidence…

A:

Q: 3. The American Medical Association (AMA) wishes to determine the percentage of obstetricians who…

A: Formula for the sample size needed to estimate a population proportion is

Q: 6.24 Social Networking Sites In a survey of 2255 randomly selected US adults (age 18 or older), 1787…

A: It is given that out of 2255 US adults, 1787 US adults use the internet regularly. Let pA be the…

Q: Is there a difference in the car brands countries for Midwesterners and people from the west coast?…

A:

Q: Based on a sample of 250 people, she obtains the following 99% confidence interval for the…

A: Given : 99% confidence interval for the population proportion, p: 0.113 &lt; p &lt; 0.171.

Q: was recorded to be as follows in kilograms: 9.57, 5.63, 7.42,9 4.86, 3.28, 4.96, 3.76. (a) If one…

A: mean = ∑xn           =59.2410           =5.924 standard deviation = ∑(xi-x)2n-1…

Q: What is the proper interpretation of a confidence interval for the difference in two proportions…

A: The confidence interval for the difference in the two proportions that has a negative number and a…

Q: a) For 30 randomly selected Rolling Stones concerts, the mean gross earnings is 2.87 million…

A:

Q: 5. The Roper Organization conducted a poll of 2000 adults and found that 382 regularly listen to an…

A: Determine the point estimate of the proportion. The point estimate of the proportion is obtained…

Q: - The box of a board game states that the average game length is 60 minutes. We play 4 games and the…

A: In order to determine whether the average game length is equal to 60 minutes or not, conduct a…

Q: In an experiment on extrasensory perception (ESP), a subject in one room is asked to state the…

A: Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at…

Q: In an experiment on extrasensory perception (ESP), a subject in one room is asked to state the…

A: Given, n = 50 x = 32           To find, Test the hypotheses that the subject can not guess more than…

Q: Mr. Price calculates a 95% confidence interval for the difference between the proportion of Aaron…

A: The 95% confidence interval for P Rodgers - P Mahomes is given as (-0.05, 0.15). When the repeated…

Q: According to a report published by the Pew Research Center in February 2010, 61% of Millennials…

A: Given : Proportion of Millennials (people born between 1981 and 1996) think that their generation…

Q: A past survey of 1,068,000 students taking a standardized test revealed that 8.5% of the students…

A: Solution: From the given information, n1=1,068,000, p1-hat=0.085, n2=1,476,000 and p2-hat=0.092. The…

Q: According to the distributor of a kind of trading card, 66% of the cards are common, 25% are…

A: We have to perform Chi-square goodness of fit test. Hypothesis : H0 : p1 = 0.66, p2 = 0.25, p3 =…

Q: Determine tc for n = 15 and a confidence level of 99%.

A: From the given information, Sample size (n) =15, Confidence level (1-α)= 0.99 Thus, the t-critical…

Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: It is given that in a survey 45% respondents accept that they talk to their pets on phone. To check…

Q: A past survey of 1,068,000 students taking a standardized test revealed that 8.5% of the students…

A: Given  n1=1068000 , p1cap=0.085, n2=1476000, p2cap=0.092 We want to find 95% CI for difference in…

Q: 1. Fill in the missing entries in the table. p. State the null and alternative hypothesis. . Is…

A: Given that Number of brands k = 5 Number of replicates for each sample = 6, then Number of…

Q: A. Find a 98% confidence interval for the proportion of heads in the experiment. B. Is there a…

A: here given ,  sample size  = n = 15000  x = no of heads  = 7515 here p^ =  751515000 = 0.501

Q: A past survey of 1,068,000 students taking a standardized test revealed that 7.8% of the students…

A: Given: Level of significance = alpha = 0.05 p1 cap = 0.078 p2 cap = 0.092 q1 cap = 1 - p1 = 0.922 q2…

Q: Based on a sample of size 50, a 95% confidence interval for the mean score of all students, μ, on an…

A: Given that, Lower confidence bound = 62 Upper confidence bound = 70

Q: The state superintendent of schools consistently states that the average salary of all substitute…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: Given,n=240x=104p^ =xn p^ =104240 p^ =0.4333H0 :P=0.45H1 : P&lt;0.45α=0.01

Q: 11. A local radio station is interested in estimating the percentage of a target market that has a…

A: Given Alpha (α) =0.02 Error=0.025 Pcap=0.56

Q: To gauge how her fellow lawmakers view the proposed “Child Car Seat" Law, 12 randomly selected…

A: The asserted claim regarding the members supporting the law in terms of proportion is to be tested…

Q: Social Networking Sites In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of…

A: Solution: Given information: n= 2255 Sample size of US adults  x = 1787 US adults used internet…

Q: A past survey of 1,068,000 students taking a standardized test revealed that 9.6% of the students…

A: Given : n1 = 1068000 p̂1 = 0.096 n2 = 1476000 p̂2 = 0.092

Q: b. If many groups of 537 randomly selected Americans were surveyed, then a different confidence…

A: ANSWER:-  95% confidence interval means 95% confident contains true mean of the population. Means…

Q: college professor would like to estimate the proportion of students who pull an "all-nighter,"…

A: Given: sample size(n)=100confidence level =99%confidence interval =(0.48,0.62)

Q: Several people from different ethnicities were asked whether we should reopen public schools in the…

A:

Q: A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students…

A: Given that  A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC)…

Q: A candy company claims that the candy colors (red, purple, green, blue, and yellow) appear in the…

A:

Q: Is there an association between grade level and whether the student makes their bed in the morning?…

A: From the given information we want to know Hypothesis.

Q: 6. A newspaper plans to conduct a survey for the upcoming presidential election in order to estimate…

A: Given that  Margin of error (E) = 4% = 0.04 Confidence level (C) = 96%    We know that  Margin of…

Q: The coach of a basketball team thinks the referee is using a weighted coin to decide which team gets…

A: The chi-square test is performed to find whether there is any difference between the observed…

Q: Suppose in a random sample of 246 individuals, 35 are considered success. Compute the margin of…

A: Here, Confidence level is given as 0.98. Thus, α=0.02 =1-0.98. From Standard normal distribution…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.