A history teacher believes that students in an afternoon class score higher than the students in a morning class. The results of a special exam are shown below. Can the teacher conclude that the afternoon students have a higher score? Use α = 0.01.  Morning Students  Afternoon Students   n 1 = 36   n 2 = 41    1 = 90    2 = 93   s 1 = 5.8   s 2 = 6.3

Q: Kevin scored at the 70th percentile on a test given to 9920 students. How many students scored lower…

A:

Q: A survey among CLSU students was conducted. It is about their starting position when they sleep…

A: As the data was collected among CLSU students. So the population is the CLSU students. And 500…

Q: .2 mn Mun 177 FOR the scores in the follawne table, what is the value of 2. 1 3. 2. 2.

A:

Q: Consider the table below that summarizes the grade performance on a recent exam for two sections of…

A: From the given information,ABCTOTALMonday Section8181339Tuesday Section1041226TOTAL18222565

Q: Percent of SmokersThe data in NutritionStudy include information on nutrition and health habits of a…

A: From the given information, the claim of the problem is that the proportion of smokers is different…

Q: µ = 43 and s = 8, what is the z score ? Margret X = 43, z = Katie X = 55, z = Dorinda X = 47, z =…

A: Given that  µ = 43 and s = 8 Formula for Z-score  Z=(X-µ)/s

Q: The time it takes, in hours, for tickets to be sold out for an AC/DC concert follows a uniform…

A:

Q: 1f. It has been reported that the first week in May NC has an average daily temperature of 88…

A: Average daily temperature of first week in May is 88 degrees. The first week had recorded…

Q: Calculate t  b. Express your results in terms of p-values (p α)  c. Determine whether your…

A: It is given that the cholesterol measurements of 54 vegetarians and 51 non-vegetarians.

Q: Suppose that 18% of a random sample of 2307 Miami residents said that they will donate blood in…

A: p =0.18 n = 2307

Q: A poll done for Newsweek found that 15% of Americans have seen or sensed the presence of an angel. A…

A: In statistic, Individual means, a thing on which the characteristics is studied. The total…

Q: you have two results for p= technically which one is the correct reference?

A: We have to find the value of p.

Q: cans who have frequent migraines is 15.2% according to the CDC. An acupun claims that her treatment…

A: The hypothesized proportion is 0.152.

Q: In a group of 17 students, the score of 1, 2, 3, and 4 were given from the judges in a competition.…

A:

Q: Let X represent the difference between the number of heads and the number of tails when a coin is…

A: Given that  The Coin is tossed 6 times  The number of trials (n)=6 Let X denotes the difference…

Q: bgroup took a test in the morning, and the other took the same test in the afternoon. This table…

A: Solution: The result table of the test is    Pass  Fail  Total  Morning 28 47 75 Afternoon 53…

Q: A teacher finds that for test grades in Class A, x̄ = 32 and S x = 4; for test grades in Class B, x̄…

A: Given information: The mean and standard deviation of the test grades of class-A are 32 and 4,…

Q: A researcher is interested in determining if sleeping more hours the night before an exam will…

A: The objective of the question is to identify the dependent variable in the given research scenario.…

Q: A certain affects virus 0.4% of the population (in a population of 100,000 people, 400 will be…

A: Given information: A certain virus affects 0.4% of the population which implies that 400 persons out…

Q: Coal is carried from a mine in West Virginia to a power plan in New York in hopper cars on a long…

A: Note: Thank you for the question. Since the complete information is missing in the question, it is…

Q: A researcher surveyed 80 randomly selected Certified Public Accountants in each of the cities in…

A: The 2*4 contingency table is given. There are two categorical variables are Free Work and Cities. We…

Q: IF X-N(47, 225). Find the z-score of X=53 O A. -0.4 O B. 1.25 O C. None of these O D. -0.73 O E. 0.4

A: In question, Given that X~N(47, 225). Then we'll find the z - score of X = 53. The solution is…

Q: A study was conducted to test the effectiveness of a juggling class. Before the class started, six…

A: The t test is a type of parametric test. It used to compare the mean significance between the sample…

Q: The following is a list of 14 measurements. -1, -38, -59, -12, -5, -77, -42, -50, -68, -62, -82, -9,…

A: Given data set:

Q: A population of scores with p = 38 and CT = 6 is standardized to create a new population with p = 50…

A: As per the given information, we have to find the z scores for each value using the previous data…

Q: Your p value is .03 and you chose your α level to be .05. What kind of error could you be making?…

A:

Q: A sample of ten commuters were asked for the distance and the time required commuting to their jobs…

A: We have given the following  SSxx = 103.6 SSxy = 276 SSyy = 872.5  · ΣX =68  · ΣY =205

Q: A certain affects virus 0.4% of the population (in a population of 100,000 people, 400 will be…

A: Solution: It is given that, the test is positive 87% of the time if the person has the virus. It is…

Q: the score that 75% of students will exceed. Consider the NAEP scores which are approximately normal…

A: Given : Normal Distribution with N(288,38) The parameters of the distribution are m and s2, where m…

Q: A physician wants to see if there was a difference in the average smokers' daily cigarette…

A: To find: What is the correct p-value?

Q: Here are several z-scores.  Which person scored furthest from average? Ahab: Z = +1.2 Brianna: Z =…

A: Givenz-scores isAhab: Z = +1.2  Brianna: Z = -0.8  Cecilia: Z = -1.4  Darnell: Z = +0.7  Evelyn: Z =…

Q: Lisa's scores on tests for the assessment class are 93, 89, 87, and 83. She needs an 89.5 average to…

A:

Q: Two varieties of corn are grown in 4 different locations. Each location provides a value in pounds…

A: Given that    Variety 1 Variety 2 difference location 1 32.1 34.5 -2.4 location 2 30.6 32.6…

Q: Papa's Italian Restaurant has collected data about customer sauce orders. It calculated that…

A: Papa's Italian Restaurant has collected data about customer sauce orders as follows:…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.