A marketing firm is considering making up to three new hires. Cen its specific needs, the management feels that there is a 55% chance of hiring at least two candidates. There is only a 5% chance that it will not make any hires and a 13% chance that it will make three hires. a. What is the probability that the firm will make at least one hire? (Round your answer to 2 decimal places.) Probability b. Find the expected value and the standard deviation of the number of hires. (Round intermediate calculations to at least 4.decime places. Round your final answers to 2 decimal places.) Expected value Standard deviation

Q: . Sampling Distribution. Distinguish between a distribution of sample means and a distribution of sa...

A: Note: Hi there! Thank you for posting the question. As there are several independent questions, acco...

Q: I need help with 1 and 2

A: r = 0.86 n = 20 t-critical value = 1.734

Q: Q3) An experiment was carried out to investigate variation of solubility of chemical X in water. The...

A: given data  Temp Mass of X 15 2.1 20 2.6 25 2.9 30 3.3 35 4 50 5.1 70 7

Q: Determine the interquartile range of the following data: 155, 134, 153, 119, 89.

A: Arrange the data in ascending order as 34, 35,, 45, 89, 119, 134, 153, 155  

Q: One hundred people were surveyed, and one question pertained to their educational background. The re...

A:

Q: 34 - t hesap =5,22 ve Sb1=0,23 olarak verildiğinde ß parametresinin tahmini olan b’nin değeri nedir?...

A: Given  t test statistic = 5.22 standard error of parameter b1 = SE(b1) = 0.23

Q: In a small private school, 6 students are randomly selected from 15 available students. What is the ...

A:

Q: Find the standart deviation 18- Standart sapmayı bulunuz 5 8 12 14 O A) 2 O B) 4 C) 1 O D) 3 O E) 5

A: Given data :  5  8  12  14 n = 4 

Q: (a) Supposen = 6 and the sample correlation coefficient is r = 0.870. Is r significant at the 1% lev...

A: To test the significance of Correlation Coefficient, the following is the test statistic t = rn-21-r...

Q: You can use both the t statistic and the z statistic to test hypotheses about the mean of population...

A: It is an important part of statistics. It is widely used. 

Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The pop...

A: Given data, n=7 σ=3   sample mean is  Mean=sum of observationsNo of observationsMean=4817Mean=68.71

Q: If one student is chosen at random, Find the probability that the student was male OR got an "B".

A:

Q: The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes and ...

A: given: data data in ascending order = 24,25,26,27,28,31,32,33,35,38,40,41 to find:  i) mean ii) stan...

Q: Comment on the skewness of the distribution.

A: to comment on the skewness of the distribution 

Q: What is a sampling error? How does it differ from other sources of error? In general, how does the s...

A: The total or entire group of data that are subject to study is regarded as population. Sample, on th...

Q: Use the normal distribution and the given sample results to complete the test of the given hypothese...

A: Denote p as the true proportion.

Q: A chemical supply company currently has in stock 100 Ib of a certain chemical, which it sells to cus...

A: Let X = the number of batches ordered by a randomly chosen customer X has the following pmf. x 1 ...

Q: I need help with B and C-1 and C-2

A: Months Owned (X) Hours Excercised (Y) (x-xbar) (x-xbar)^2 (y-ybar) (y-ybar)^2 (x-xbar)*(y-ybar) 12...

Q: Here is the probability model for the blood type of a randomly chosen person in the United States:  ...

A:

Q: ​41 % of adults say cashews are their favorite kind of nut. You randomly select 12 adults and ask ea...

A:

Q: probability that when drawing a card at random from deck, it will be queen of hearts ? 1.92% unable ...

A: Given Data: A deck of card contains 52 cards s=52   number of queens in a deck=4 number of queen of ...

Q: In a distribution with a population mean of 60 and variance 25, the sample mean averages the standar...

A:

Q: In a random sample of four mobile devices, the mean repair cost was $70.00 and the standard deviatio...

A: Given data,x=70s=14n=4α=0.05df=n-1=3t-critical value at α=0.05 and df=3 is tc=3.182

Q: 26 - Find the variance Varyansı bulunuz. Si f 2 4 4 7 6 3

A: The variance is calculated as σ2=∑f(si-s¯)∑fs¯=∑fsi∑f

Q: The following table gives the two-way classification of 500 students based on sex and whether or not...

A: Total students, n=500 Total females= 160+100= 260

Q: Assume that X is a hypergeometric random variable with N= 28, S=5, and n= 5. Calculate the following...

A: Answers:  (a) P(X=1) = 0.4505   (b)  P(X=5) = 0.0000102    

Q: Thirty students in the School of Business were asked what their majors were. The following represent...

A: Given, The following represents the responses (M = Management; A = Accounting; E = Economics; O = Ot...

Q: 9

A:

Q: When is it appropriate to use a z-test, a t-test, and nonparametric tests for one sample or two samp...

A:

Q: suppose the true value for the above measurements is 88.4. What would the average percent error be? ...

A: Given: True value is 88.4. Measured value is 88.33. The average percent error is obtained as below: ...

Q: If you know the names of the remaining four students in the spelling bee, what is the probability of...

A: Given Data: Number of students name in spelling bee=4   Total possible Number of orders of name=4!  ...

Q: Only Need Answers D,E, & F

A: Height measurements in centimeters for a sample of infant participating in a study of infant health ...

Q: Suppose a couple planned to have three children. Let X be the number of girls the couple has. (a) Li...

A: a.  All possible arrangements are as follows: {BBB, BBG, BGB,GBB, GGB,GBG,BGG,GGG} Note that all 8 o...

Q: Suppose we have 10 subjects and the probability of having a disease at one point in time for 1 subje...

A:

Q: 1. In a random sample of 8 people with advanced degrees in biology, the mean monthly income was $474...

A: Given that, Mean, x bar = 4744 Sigma = 580 Sample size, n= 8 Z at 95% level of significance is 1.96 ...

Q: The results of Principal Component Analysis are less reliable if the scale of measurement of the var...

A: Introduction: Principal Component Analysis is a dimensionality reduction procedure, which attempts t...

Q: David Anderson has been working as a lecturer at Michigan State University for the last three years....

A: Introduction: Denote μ1, μ2 as the true mean scores of students in the first and second sections, re...

Q: Use the t-distribution and the given sample results to complete the test of the given hypotheses. As...

A: Introduction: Denote μ1, μ2 as the true population means. Based on the given question, the null and ...

Q: 14 - A) 45,5B) 29,2C) 33,7D) 22,5E) 34,5

A: Grouped frequency distribution given Class interval freq  23-25 4 26-28 5 29-31 9 32-34 4

Q: Approximately 80% of statistics students do thier homework in tiem for it to be collected and graded...

A: A) From the given information, the 80% of the students do their homework on time. There are 20 stude...

Q: Consider the following competing hypotheses and accompanying sample data drawn independently from no...

A: We have given that,   H0: μ1 − μ2 = 0 HA: μ1 − μ2 ≠ 0      x−1 = 65 x−2= 73   σ1 = 13.0...

Q: Find the z* values based on a standard normal distribution for each of the following.     ...

A: (a) A 78% confidence interval. Computation of critical value: 1-α=0.78α=0.22α2=0.111-α2=0.89 The cri...

Q: At a local racetrack, each race has 5 horses. Assume that the horses are equally matched in the race...

A: The probability of winning a particular race is, p=15   =0.2 Consider a random variable X which repr...

Q: Using the data below which are the numbers of kilos of newspaper contributed by one section of the n...

A: The given data is,  25, 64, 15, 42, 64, 30, 30, 12, 45, 63, 45, 25, 70, 48, 82, 16, 17, 42, 33, 75, ...

Q: You conducted a statistical analysis and did not find that there was a statistical difference in lif...

A: Type-II error: Type-II error is accepting the null hypothesis H0, when the null hypothesis H0 is fal...

Q: For one of the many scratch-and-win lottery games in Texas we have the following information. There...

A: Given that total number of winners = 37458000 Total number of tickets = 300000000

Q: A sample of 25 families was taken for a study. The objective of the study was to estimate the factor...

A: Multiple linear regression model: A multiple linear regression model is given as y = b0 + b1x1 + b2x...

Q: If you could show the excel equations for each of the questions that would be very helpful

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any ...

Q: This table illustrates the growth of a population, which is assumed to be exponential growth. Note x...

A: The year is the independent variable (x) and the population is the dependent variable (y).

Q: Suppose that the probability that a child living in an urban area in the United States is obese is 2...

A: It is given that, the probability that a child living in an urban area in the United States is obese...

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.