e we took a random sample of 200 students and ask if they preferred morning, evening, or night classes. a.If 76 students preferred morning classes what is the 95% CI for the proportion of students who prefer morning classes? b. Based on this confidence interval what would be the decision to the hypothesis: H0 = .3 vs Ha ≠ .3 using alpha = .0

Q: An independent-samples study comparing two treatment conditions produces a t statistic with df = 16.…

A: The formula of degrees of freedom is,

Q: Cola A 59 89 72 HEHEHERRS Cola B 90 71 77 81 86 83 87 Cola A 76 87 60 60 72 Cola B 88 80 69 93

A: If x1, x2, x3,........, xn are the n number of observations then the mean is calculated by using the…

Q: Stage Magician Handbook, magic rabbit weight (Ibs.) is prmally distributed with u = 6.2 and o = 1.5.…

A:

Q: Suppose a study reported that the average person watched 1.87 hours of television per day. A random…

A: Consider that μ is the population mean amount of television watched by the average person per day.

Q: 200 randomly selected college students, with 168 answering correctly; the second one is asked of a…

A: From the above data provided The first question is asked of 200 randomly selected college students,…

Q: O p = 0.30, z = 0.803, p-value = 0.041 P = 0.208, z = -1.290, p-value = 0.098 Op = 0.75, z = -1.32,…

A: Let p be the population proportion of adults who stated that they drank once a week or less in the…

Q: Calculate the test statistic and P-value. (Round your test statistic to two decimal places and your…

A:

Q: In a sample of n = 4, three subjects have scores that are 1 point below the mean each. The 4th…

A:

Q: A researcher wants to study the proportion of people on trial for first degree murder who are found…

A: Given data: proportion: p = 0.15 Claim: The proportion of U.S teenagers between the ages of 13 and…

Q: ) What percentage of scores was (1) predicted to fall and (2) actually fell within ±1 SD for ADHD?…

A: Solution

Q: Solve the following problems according to the proper test to be used: In a before and after…

A: From the above given data the following solution is provided below:

Q: Perform a hypothesis test to test whether there is a difference in the average price. Use a = 0.05

A: Let μ1 and μ2 are the average prices of couches at two different stores. Given that,…

Q: study was done to compare the flu incidence rates at the sart and at the end of winter of a given…

A:

Q: For a population with u= 40 and a =8, what is the z-score corresponding to X-34?

A: Z-score is -0.75

Q: a. decrease the sample size b. use an alpha (a) of .01 instead of .05 c. decrease the population…

A: use an alpha (α) of 0.01 instead of 0.05

Q: It is claimed that the proportion of OSU students who belong to a fraternity or a sorority is 0.15.…

A: P value will claculated by using z table

Q: A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of…

A:

Q: For a population with u =70 and o= 8, what is the z-score cor %3D corresponding to X= 82?

A:

Q: A screening test run on a sample of participants revealed the following results: 80 sick people and…

A: Given, in a screening test 80 sick people and 50 healthy people were tested positive. 30 sick person…

Q: If X-t(12), then the (97.5)th percentile of X is closest to: О а.218 O b. 2.44 O c. -2.44 O d. -2.18…

A: Probability distributions are of 2 types, discrete and continuous. The t distribution is a…

Q: Males and females were asked what they would do if they received a $100 bill in the mail that was…

A: The random variable answering yes follows binomial distribution. There are two independent samples…

Q: 21. What is the 98% confidence interval for the difference in population means, p1 – p2 given the…

A: Let p1 denotes the population proportion for population 1 and p2 denotes the population proportion…

Q: A company that produces a certain medicine claims that less than 0.1% of the people who take the…

A: as in question it is not giving that claimes ratio increases or decreasea after  changing. so,I am…

Q: The average final exam score for the statistics course is 76%. A professor wants to see if the…

A: Given Information: The average final exam score for the statistics course is 76% Sample size n=13 To…

Q: = 18 for a repeated-measures t sta nts.

A: Given that, for a repeated measure t-test.To identify whether the given statement is true or false.

Q: he dietician is working with a random sample of 50 patients who are dieting. He puts them on a…

A: The dietician is working with a random sample of 50 patients who are dieting.

Q: A researcher would like to evaluate the effectiveness of a pain-relief patch designed for lower back…

A: Introduction: Denote μ1, μ2 as the true mean lower back pain levels before and after wearing the…

Q: 2. A sample of

A:

Q: A phannaceutical company makes tranquilizers. It is assumed that the distribution for the length of…

A:

Q: A researcher tests for mean differences between three samples, each with n=4 participants, and…

A:

Q: B. Find the mean, standard deviation of the sampling distribution of the means. You may use the…

A: According to bartleby policy I have solved first three subparts of this question

Q: H1: p v (Please enter a decimal) c. The test statistic zv = (please show your answer to 3 decimal…

A: From the given What is the Alternative hypothesis Test statistic (z ) =? P value = ?

Q: At the a Y 0.05 significance level, what is the most appropriate conclusion to draw from this test?

A: To make decisions about hypothesis, we make comparison of p-value and level of significance.

Q: Find the value of test statistic F, if MST= 31.744 , and SSE= 17.36, P=3 and N=17.

A:

Q: An administer claims that the proportion of students who pass a particular test given to all college…

A:

Q: The results of a mathematics exam at JUST university for two classes are as follows: Class 1: (n=32,…

A: Class 1:Mean = 19SD = 8n = 32Class 2:Mean = 6.5SD = 12n = 36

Q: Teacher Joy conducted a census in her class and she found out that the average time spent for…

A: It is given that  The average time spend for study = 2.25 hours  The average height = 147 cm Sample…

Q: For a population with u = 84 and o = 4, what is the z-score corresponding to X = 80? %3D %3D O-1.00…

A: The z score indicates how many standard deviations that a data points away from the mean. It can be…

Q: Adults aged 18 years old and older were randomly selected for a survey on obesity. Adults are…

A: From the provided information,

Q: Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data.  Test the…

A: Given Information: 200 people were asked “Who is your favourite superhero?” Categories Observed…

Q: ative cars among residence of two neighboring cities differ. In order to est, the researcher…

A: Sample sizes n1=185  , n2=195 Favorable cases x1=75 , x2=68

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.