A factory owner wants to estimate the average hours lost due to a machine breakdown. Recording for the last one year, there have been 15 times the damage. Of the nine samples, it is known that the average lost working hours is 3.5 hours with a sample standard deviation of 1.5 hours. Make an estimate of the average lost working hours using a confidence level of 98%

Q: When α = .10, what is the rejection region that should be used to test H_0:σ1/2=σ2/2   against…

A: Given Information: Significance level α=0.10 Null Hypothesis H0:σ12=σ22 Alternative Hypothesis…

Q: The accompanying data are lengths (inches) of bears. Find Q2- E Click the icon to view the bear…

A: Here's total observation is 54. We will use quartile formula to find third quartile.

Q: 2) Fit a straight line to the data shown below using least squares method and compute the standard…

A: We need to fit a straight line to the given data using least squares method and compute the standard…

Q: Independent random samples of  64 observations each are chosen from two normal populations with the…

A: We have given that,  Population mean (μ1) = 12, population standard deviation σ1 = 4, n1 = 64 and…

Q: A data set includes the counts of chocolate chips from three different types of Chips Ahoy cookies.…

A: Note: Hi! Thank you for the question. The first part, the part in text format, relates to one…

Q: Question 3. For the regression model y, = a + ßx, +ɛ, Show that the least squares normal equations…

A: see the attachment........

Q: The average national salary is 45,000 (in this example, 45 represents 45,000). I take a sample of 14…

A:

Q: Please specify the key problem with this question included in a questionnaire: "When using the…

A: We have to specify the key problem with the question included in the questionnaire: "When using the…

Q: Suppose that X1,..., Xn are i.i.d. following pdf given by f(x; 0) = že-5, where both x and O are in…

A:

Q: 13. Suppose that X is a continuous random variable with the probability density func- tion given by…

A:

Q: 5 singles, 8 fives, 5 twenties, and 3 hundred dollar bills are all placed in a hat. If a player is…

A: Given: There are 5 singles, 5 twenties and 3 hundred dollar bills placed in a hat

Q: 19. Show that the value of yo when та mx dp = yoe 1 += a dx, - a sx<o∞ gives probability density…

A:

Q: Hospitals must keep enough antibiotics on hand to treat infectious diseases. Researchers want to…

A: We have given that,  X1 = 32, n1 = 192  And X2 = 34, n2 = 403 Then,  We will find the 99% confidence…

Q: A chord of a circle of radius a is drawn parallel to a given straight line, all distances from the…

A:

Q: Give the marginal probability of (a) X - number of Bars of Signal Strength Y = response time…

A: The marginal probability of ( a )  =?

Q: 19) A sample of 39 students enroll in a program that claims to improve scores on the quantitative…

A: According to the given information in this question We need to calculate the p value when the values…

Q: The accompanying table gives amounts of arsenic in samples of brown rice from three different…

A:

Q: Find the area of the shaded region. The graph depicts the standard nomal distribution of bone…

A: Let Z be the random variable from standard normal distribution with mean = 0 and standard deviation…

Q: 1. A community-based intervention program for hypertension was undertaken in two communities to…

A: The following information has been given: For Community A:   Hypertensive  Normotensive Smoker…

Q: Suppose 170 geology students measure the mass of an ore sample. Due to human error and limitations…

A: n=170 Mean=86 Standard deviation=3

Q: 2. In a particular year in your health jurisdiction, there were 2,675 births. In reviewing their…

A:

Q: 1. A local government official observes an increase in the number of individuals with…

A: List of formulae : 1) Confidence interval for true mean when population variance known : CI = x¯ ± E…

Q: In a survey, 200 shoppers were asked whether they have access to a computer at home and if they have…

A:

Q: 4. The mean and standard deviation of n measurements randomly sampled from a normally distributed…

A:

Q: 2. Out of a sample of 200 gaming systems, 4 units were found to be defective. The industry standard…

A:

Q: roblem 3 et X1, X2, X 3, ..., Xn be a random sample from nknown. Define the estimator Ôn = max{X1,…

A:

Q: 1- In order to determine the proportion of defects in a shipment, 40 parts from it are randomly…

A: Given,  To determine the proportion of defects in a shipment, 40 parts from it are randomly selected…

Q: certain dog can catch a properly thrown tennis ball with a probability of 0.95. unfortunately, this…

A: Given that, a certain dog can catch a properly thrown tennis ball with a probability of 0.95.…

Q: Find the numerical value of the area under the normal curve that is below z= -0.99. O Area = 0.0985…

A: Let Z be the normal distribution then we will find the area under normal curve below  z = -0.99 ?

Q: I’m interested in seeing whether or not online supplementary material helps students achieve higher…

A: Given Information: Sample space of Group 1(Online + textbook)=(95, 90, 92, 92, 84, 86, 91, 92, 80,…

Q: Refer to the tabie to the right summantzing measured amounts of serum cotinine (ngimL) trom a sample…

A: The objective is to find the relative frequency corresponding to the frequency distribution.…

Q: ample 8.1(). A computer while calculating correlation coefficient between two variables X and Y from…

A: Given that                        We have to find the corrected correlation coefficient...

Q: 28 cars are in a race. In how many different ways can cars finish in the top 4 positions?

A:

Q: 200 lottery tickets are sold for $5 each. The person with the single winning ticket will get $63.…

A: Solution Given, 200 lottery tickets are sold for $5 each.  The person with the single winning ticket…

Q: 21. For the distribution dP = yo e - bxl dx, - 00 Sxs∞ | 1 Hi = 0, o = v2, mean deviation about the…

A:

Q: Which of the following is a probabilistic sampling approach that does not require the use of a…

A: Probability sampling or probabilistic  sampling  means that every member of the target population…

Q: You have been wondering whether the attention span of your classmates have gotten shorter because of…

A: Given information: Variable of interest: The attention span of students In group A,  No. of…

Q: are equal. Use the traditional method or P-value method as indicated. deviations 20 A researcher was…

A: Given Data : For Sample 1 x̄1 = 12.5 s1 = 3.9 n1 = 14 For Sample 2 x̄2 =…

Q: Two pair misread values. A computer while calculating the correlatiop coefficient.between two…

A: Given Number of observations, N = 25 ∑ x=125∑ x2=650∑ y=100∑ y2=460∑ xy=508 Incorrect observations…

Q: children at a local elementary school. The results are shown in the table below (image) :  a. State…

A:

Q: Listed below are blood platelet counts (1000 cells/uL) randomly selected from adults in the United…

A: Histogram is the graphical presentation of statistical data  Histogram is commonly used graph to…

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 424 green peas…

A: The question is based on a confidence int. of a popl. prop. Given : Total no. of green peas ( y )=…

Q: a. The provisional guess about p is between 0.45 and 0.60

A: here given , Margin of error = 0.1. Sample size = 400

Q: Researchers randomly assign 5-year-olds to view videotapes of either a snake, a lion, or a kitten.…

A: For the given data, we need to find the sum of squares between.

Q: A clinical psychologist claims that social support causes life satisfaction to increase. They want…

A:

Q: Based on this histogram, the numerical kurtosis value for average handle time is most likely

A:

Q: (a) Show that 2X is also an unbiased estimator of B. the properties of sample mean,

A: Given:  Random variable x with mean (beta/2)  Then to show that "2*xbar" be  the unbiased estimate…

Q: Scenario: Does studying with background music (X) improve test scores (Y)? Students self-reported…

A: Here's Y is the dependent variable (improve test scores).

Q: 5 5 5.5 5 5.5 9 7 8 9 6 7 8 8 7 8.5 Using Jamovi, and assuming we’re testing at an…

A:

Q: A random sample of 100 batteries has a mean lifetime of 15 hours. Suppose the standard deviation for…

A: