Practice Task • A final examination given to 47 students resulted to the following grades 26 82 82 91 60 50 75 75 76 33 77 67 63 42 78 68 62 75 70 68 55 60 77 59 68 84 81 65 65 36 43 79 60 68 65 47 47 77 79 70 52 53 67 47 49 47 53 a. What is the range of the above scores? b. Construct class intervals and a group frequency distribution by tallying the marks. c. Draw a histogram of the data.

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Q: o. what is the probability that the mean of the numbers is 1.5 ? b. what is the probability that the…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Statistics students showed an average of 7.4 hours of sleep before the exam. At a=0.10, is there…

A: here sample size  = 34 sample mean = 7.4 alpha  = 0.10

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A: Given: x 100 150 200 250 360 490 500 600 671

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Q: 19. People were surveyed and asked how many TVs are in their household. Here are the results: 1 2 3…

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Q: 1. A jar contains numbers 0. 1, 2 and 3. Construct the sampling distribution of the sample means…

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Q: 3. A plastic jar contains 4 triangular shape chocolates, 3 circular chocolates, and 6 rectangular…

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Q: II. Direction Find the area under the t- distribution from t = -2.060 to t = 2.060 when n = 26, then…

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Q: For the following z scores, please tell me the percentage of scores that lie below it: a. 2.5…

A: We will use Std. Normal table to find the required percentages.

Q: i. What is the probability that a randomly selected subscription expiring at the end of the year was…

A: Here We will use Basics of Tree diagram and Byes thoerem

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A: Given that

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Q: The sampling distribution of p, the proportion of groceries thrown out by your sample respondents is…

A: Solution-: Given: n=540,p=0.12 (Or 12%) we choose correct option in the following (a) not normal…

Q: Example 60. A bond has a face amount of Rs 1000 and maturity period of 10 years. The nominal…

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Q: Describe type I and type Il errors for a hypothesis test of the i A lumber store claims that no more…

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Q: QUESTION 2 a) Consider the following probability density distribution of random variable X. if 0<x <…

A: Given,f(x)=kif 0&lt;x&lt;6kx+3kif 6&lt;x&lt;100otherwise

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Q: Jac tosses an unbiased coin. If the coin lands with head up on each toss, he wins Php50. However, if…

A: Jac wins 50 hence The event of wining is +50 Jac loses 60 hence The event of losing is -60

Q: 6. How does the standard deviation (ø) affect the sample size? (Assume that the other factors are…

A: As per our guidelines we are supposed to answer only one question per post  so i am solving…

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A: The all possible combinations from six letters A B C D E F are :- A,BA,CA,DA,EA,FB,C

Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A: Solution-: Given: M.E.=0.03,α=0.01, We take, p^=0.5 and  q^=0.5  We find how many residents do they…

Q: A research center claims that 30% of adults in a certain country would travel into space on a…

A: Given ,  Sample size = n = 1200 Sample proportion = p^ = 33% = 0.33 a)  Claim : 30% of adults in a…

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A: ( a ) cohensd =? ( b ) Magnitude

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A: PROPOSITION PROPOSITION ONE is false, while PROPOSITION TWO is correct.

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Q: A researcher wants to conduct an experimental study on the effect of learning strategies…

A: The experimental study on the effect of learning strategies and interest  The learning strategies…

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

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A: n= 100.p = 0.36First we need to check the conditions ofnormality that is if n*p and n*(1-p) both…

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A: Given: Sample meanx¯=485Sample standard deviation(s)=80

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Q: A travel agency sells 50 holidays that have an average cost of £300 per person with a standard…

A: The random variable X follows normal distribution. We have to find the standard error of the mean…

Q: If X has probability density function f(x) = ce", 0 < x < 1. %3D Determine Var(X).

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Q: From the following annual average prices of the three commodities given in rupees per unit find the…

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Q: Find the value of k.

A: NOTE-AS PER POLICY I HAVE CALCULATED FIRST MAIN QUESTION ONLY KINDLY REPOST OTHER QUESTION AGAIN…

Q: 1. A jar contains numbers 0, 1,2 and 3. Construct the sampling distribution of the sample means when…

A: Histogram : A bar graph may be a graphical illustration that divides a group of information points…

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A: Histogram To make a histogram in Microsoft excel click on the option of data in the home tab, then…

Q: 5. What is the difference between the normal distribution and the t-distribution? A. The…

A: We have given that the statements about to the t-distribution. Here, need to find the correct choice…

Q: 2. USA Today reported that the state with the longest mean life span is Hawaii, where the population…

A: The output is given as:

Q: Example 1. Find the equilibrium point in the following cases. 2x + 2 and p = 100 8x +12 100 (a)…

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Q: Suppose that X1, X2, .. , Xm and Y1, Y2, .. , Yn are independent random samples from N(ux,o3) and…

A: Given that X1, X2, ........,Xm and Y1, Y2,..... Yn are independent random samples from N(μx ,σx2 )…

Q: For numbers 9 to 11, The principal of Mapayapa Integrated National High School claimed average…

A: Given that  Sample size n =15 Standard deviation =400

Q: 7. The mean number of arrivals per minute is 4. Find the probability that (a) no customers are…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: what is the standard normal curve that lies between -1.11 and 1.11

A:

Q: Voting is done in a class consisting of 30 students to determine the study tour destination. One…

A: Given that, Voting is done in a class consisting of 30 students to determine the study tour…

Q: 7. A researcher wants his/her estimate with margin of error. Which of the following is suggested? A.…

A: Here use basic of margin of error

Q: Determine if the statements below are true or false. For each false statement, suggest an…

A: here use chi square distribution basic

Q: Online selling An online seller of yema cake, which is very popular in Tayabas Quezon surveyed…

A: Fifty-two percent of the customers were satisfied Services that were offered with margin of error…