A researcher obtained a random sample of n= 60 students to determine if there were any significant preferences among 3 brands of colas. Each student tasted all three brands and then selected his/her favorite.  The frequency distribution was: Brand A = 28, Brand B = 14, Brand C = 18.  Do the data indicate any preference among the three brands? (Test with α = .05)

Q: One researcher collected a sample of expenses for advertisement from 5 companies as follows: 50, 60,…

A: The sample mean is, x¯=∑xn=50+60+55+58+725=2955=59 The sample mean is 59.

Q: A local pizza company ran a taste test with 3 different sauce recipes. The study consisted of 60…

A: It is given that a local pizza company ran a taste test with 3 different sauce recipes.

Q: We are comparing a the price distributions for phones between two groups. That is, if X and Y are…

A:

Q: The five number summary of a dataset was found to be: 1, 5, 12, 15, 19 An observation is considered…

A:

Q: In order to test if the observed frequencies follow the expected ratio, what should be the hull…

A: Provided information is, in a breeding experiment, chicken with white feathers, small comb were…

Q: A marketing company believes people have no preference in the taste among four beers.  To test this,…

A: The correct test to use to test if there is a statistical difference between brands is a One-way…

Q: the sample size is 30 for each group, there are 3 groups, and the mean score for football players is…

A: Mean square between: The between group variation is how much variation it is due to the interaction…

Q: In the original experiment, the average for the treatment group was 0.6 higher than the average for…

A: As per the question, we are given information about a significance test involving 100 simulations,…

Q: A tyre manutacturer randomly samples 40 tyres at the end of each shift to test for tyres that are…

A:

Q: 3. A survey to determine the Extent of underaged snoking in California was'conducted. The number of…

A: Chi square test statistic is used to measure whether there is any significant relationship between…

Q: In an analysis of variance study (ANOVA), individuals were separated to two groups to test the…

A: Solution: Option b is correct. i.e. Factor: Medicine type,Treatments:group 1,group 2,response…

Q: A local pasty company ran a taste test with 3 different pasty recipes. The study consisted of 60…

A: It is given that a taste test with 3 different pasty recipes from a local pasty company.

Q: You conduct a one-factor ANOVA with 3 groups and 6 subjects in each group (a balanced design) and…

A: Solution

Q: Qualifications of male and female head and assistant college athletic coaches were compared in an…

A: Gender    1–3    4–6    7–9   10–12   13+  Row…

Q: The number of times a student is on their cell phone in class last week is 10, 11, 9, 13, and 12.…

A: Solution: The given data is 10, 11, 9, 13 and 12.

Q: Like father, like son: In 1906, the statistician Karl Pearson measured the heights of 1078 pairs of…

A: Use TI calculator to obtain the P-value: Select STAT > Edit > Enter the values of Father's…

Q: A group of scientists from the marketing department of a major cola company ran a "Pepsi Challenge"…

A: Answer and explanation given in steps below. Thanks!

Q: Whare the degrees of freedoms for the treatment and experimental errorst

A: Given that,No. of treatments No. of replications Treatment means

Q: In a sample of 137 leopards selected randomly from one preserve, it is found that 7 of them have…

A: H0 : p = 0.13 H1: p ≠ 0.13

Q: A random sample of n1 = 148 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 14…

A: a) The level of significance, denoted by α, is defined as the probability of incorrectly rejecting…

Q: A statistical study is made to compare the % of smokers in small rural towns to the overall smoking…

A: Given Information:n=1500x=285c=95%=0.95

Q: The researcher is interested in whether individuals will think a composite of 4 faces looks more…

A: The p-value is less than 0.001. The test statistic is -4.691.

Q: A sample of 145 matched pairs of banks was formed in a study comparing banks in Turkey and Germany.…

A: Given: n=145Sample mean difference d¯=0.0506Sample standard deviation of differences s=0.3039 Let X…

Q: A random sample of n1 = 154 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 11…

A: The given data is as follows: For island of Oahu, The sample size n1 is 154 and the number of high…

Q: gyptian fruit bats in the wild commonly eat loquats, figs and wild dates. A researcher wanted to see…

A: Given, Egyptian fruit bats in the wild commonly eat loquats, figs and wild dates. A researcher…

Q: What is the​ p-value?

A: Here sample size is too large so use z test for proportion

Q: A sample of 32 objects had the following results:  ¯xx¯ = 109 The median = 112 SS = 9. Suppose 3…

A: From the given information, total number of objects n = 32. Sample mean  Median = 112. Sample…

Q: A local pasty company ran a taste test with 3 different pasty recipes. The study consisted of 60…

A: Choice of Statistical Test depends on several factors.

Q: 700 person of London were asked by some BBC investigator to give the nationality of the music they…

A:

Q: (a) What is the level of significance? State the null and alternate hypotheses. O Ho: Hy = Hzi…

A: For fishing, sample size n1 = 41, sample mean = 4.9 and population SD = 1.6 For camping, sample size…

Q: A study used nicotine gum to help people quit smoking. It was recorded whether each participant had…

A: (a). Obtain the sample proportion of people using nicotine gum stopped smoking: It is given that,…

Q: A researcher was comparing the differences between only two groups using a t-test. Would Post Hoc…

A: Given: A researcher was comparing the differences between only two groups using a t-test.

Q: In a random sample of 40 patients undergoing a standard surgical procedure, 14 needed pain…

A: Now use the Z-score for a 95% confidence level, which is approximately 1.96:CI = (p1 - p2) ± Z *…

Q: You conduct a one-factor ANOVA with 6 groups and 5 subjects in each group (a balanced design) and…

A: Given  b=6 and k=5  N=bk=6x5=30 N=30

Q: A South African manufacturer of BMW cars offers a model in one of three colors: Blue, Red, or Black.…

A: Given information: There are 3 colors: Blue, Red and Black. P(Blue)=1/3 Claim: Test whether or not…

Q: A random sample of n1 = 157 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 12…

A:

Q: Find the 90th percentile.

A: It is very useful in statistics . It is highly used nowadays .