Many firms use on the job training to teach their employees computer programming. Suppose you work in the personnel department of a firm that just finished training a group of its employees to programme, and you have been requested to review the performance of one of the trainees on the final test that was given to all trainees.the mean and standard deviation of the test scores are 81 and 3, respectively, and the distribution of scores is bell-shaped and symmetric.suppose the trainee in question received a score of 77.compute the trainee's z-score?

Q: The operations manager of a motor vehicle accessories firm with branches in Limpopo and Durban wants…

A: Given that,mean(x)=355.2standard deviation , s.d1=151.5number(n1)=31mean(y)=265.6standard deviation,…

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

A: Given: Formula used:

Q: Suppose that two post-sixteen students, A and B, both end their studies in the same percentile, but…

A:

Q: Researchers for a company that manufactures batteries want to test the hypothesis that the mean…

A: Given information- Sample size, n = 32 We have the mean and standard deviation of the battery lives…

Q: If the mean and standard deviation of a population are 40 and 2, respectively and the sample size is…

A: Dear student, If you find this solution helpful please upvote ? it.

Q: Suppose that, based on historical data, we believe that the annual percentage salary increases for…

A: Given Information: Mean μ= 12.2% = 0.122 Standard deviation σ = 3.6% = 0.036 Sample size (n) = 9 To…

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

A: Given; n1=200x¯1=23.8s1=4.1n2=200x¯2=17.1s2=3.2The level of significance is given…

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

A: (a) The degrees of freedom is,…

Q: The number of Grade 11 learners per section in Kasiglahan Village Senior High School has a mean of…

A: The population mean is 56.3. The population standard deviation is 8.6. We have to write which…

Q: Montarello and Martens (2005) found that fifth-grade students completed more mathematics problems…

A: Given sigma=18, mu=100, Xbar=104, Zcritical=2.3263 at alpha=0.01

Q: In a study of employee stock ownership plans, satisfaction by employees is measured and found to be…

A: Given,mean(μ)=4.89standard deviation(σ)=0.63sample size(n)=450

Q: In a study of inter spousal aggression and its possible effect on child behavior, the Behavior…

A:

Q: Subjects in a study by Dabonneville et al. (A-9) included a sample of 40 men who claimed to engage…

A: From the provided information, The hypotheses can be constructed as: H0: µ1 = µ2 H1: µ1 < µ2…

Q: In preparation for the upcoming school year, a teacher looks at raw test scores on the statewide…

A: Given data,Mean μ=49sd σ=20.7z-score =2Test score X=?

Q: Suppose the grades in a finite mathematics class are normally distributed with a mean of 75 and a…

A: Given Data: The mean of the distribution is: μ=75 The standard deviation of the distribution is: σ=5…

Q: The number of pets owned by twelve randomly chosen students are  0 0 1 3 14 1 2 2 0 1 2 1 If each…

A: Given data sets are 0 0 1 3 14 1 2 2 0 1 2 1

Q: Suppose math scores on the SAT are normally distributed with a mean of 500 and a standard deviation…

A:

Q: Mrs. Bracken asks a random sample of 500 adults whether they favor giving vouchers to parents of…

A:

Q: If the grades on a statistics test are normally distributed with a mean of 80 and a standard…

A: Introduction: Define X as the grade of a randomly selected student. It is given that X has a normal…

Q: Suppose a psychologist specializing in learning disorders wanted to estimate the mean IQ score for…

A: Note:  Since, we only answer up to 3 sub-parts, we'll answer the first 3. Please resubmit the…

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

A: Given: n1=200, X1=24.7, s1=4.1n2=200, X2=15.4, s2=2.6α=0.1

Q: A car dealership looks back at their previous year’s sales records. Last year, the dealership sold…

A:

Q: ording to one pollster, 47% of children are afraid of the dark. Suppose that a sample of size 20 is…

A: Consider "p" be the true proportion which represents the proportion of children that are afraid of…

Q: in a recently conducted study, families reported using an average of 70 gallons of gasoline per…

A:

Q: Within a school district, students were randomly assigned to one of two Math teachers - Mrs. Smith…

A: We want to find the test statistic and p value

Q: 4. A test prep company claims to help students gain 12 points in their math exams between the time…

A:

Q: Suppose a paint manufacturer has a daily production, x, that is normally distributed with a mean of…

A:

Q: ) H0: ?1 − ?2 = 0 Ha: ?1 − ?2 > 0     t=_________ P-value_______   State the conclusion in the…

A:

Q: Montarello and Martins (2005) found that fifth grade students completed more mathematics problems…

A:

Q: oup of 10 friends played a mini-golf competition. Eight of the friends tied for second place, each…

A: Given: Let the missing score be a. The data for scores (X) is shown below 34 34 34 34 34…

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

A: The mean and standard deviation for group 1 are  x1=22sd1=3.5n1=200 The mean and standard deviation…

Q: Compute the value of the test statistic.

A: For class 1, sample size n1 = 15, sample mean = 81.2, sample SD = 3.4 For class 2, sample size n2 =…

Q: The operations manager of a motor vehicle accessories firm with branches in Limpopo and Durban wants…

A: INTRODUCTION :  large sample test  Let x1 be the sample mean of the sample taken from the first…

Q: 2. A teacher claims that the learning performance of male and females students in Mathematics is…

A: Testing of hypothesis is a rule which, when the sample values have been obtained, leads to a…

Q: A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: From the given information, let X be the weight of the cereal box. Number of cereal boxes randomly…

Q: A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: Given A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

Q: Two researchers conducted a study in which two groups of students were asked to answer 42 trivia…

A:

Q: 2. The number of pages in a PDF document you create has is randomly distributed between 5 and 9…

A:

Q: The operations manager of a motor vehicle accessories firm with branches in Limpopo and Durban wants…

A: Let X be the value for the Limpopo branch. Let Y be the value for the Durban branch. The information…

Q: The high school athletic director is asked if football players are doing as well academically as the…

A: Given: Sample mean x¯=3.18 Sample standard deviation (s) = 0.54 Sample size (n) = 20

Q: The number of feathers on a typical blue jay is believed to be normally distributed. On average, it…

A: Correct answer is (e). P(-7.5<Z<1)

Q: A certain company intends to market a weight-loss pill. They test it on a group of 2000 volunteers,…

A: The following data is given for the samples. Sample 1: n1=1000, x¯1=10, s1=6 Sample 2: n2=1000,…

Q: A personnel psychologist has to decide which of three employees to place in a particular job that…

A:

Q: What is the standard deviation of the commuting time?

A: The standard deviation formula for uniform distribution is, σ=b-a12 The commuting time on a…

Q: It is known that the distribution of the Wechsler Adult Intelligence test is normal, the mean is µ =…

A: It is given that the mean is 130, the standard deviation is 15 and the sample size is 9.

Q: Subjects in a study by Dabonneville et al. (A-9) included a sample of 40 men who claimed to engage…

A:

Q: Suppose the number of Covax and Pfizer vaccine bought by the Philippine government are normally…

A: Define: Let X1 be the Covax vaccine bought by the Philippine government. Let X2 be the Pfizer…

Q: In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with…

A: Given: Mean μ=68.4 Standard deviation σ=4.0   a) Calculate the probability that the study…

Q: A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: From the given information,   Mean = 368 Standard deviation = 15 Sample size = 64   The objective is…

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.