Suppose X~N(102,16) and Z~N(0,1). If z = -0.71, what is it on an X scale?

Q: Mean of 100 observations is found to be 40. If at the time of computation two items are wrongly…

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Q: A sample has a mean of 30 and s=8 would a score of x=36 be considered a central score or an extreme…

A: The z-score for x=36 when mean of 30 and standard deviation of 8 is, z=x-Means=36-308=68=0.75 It is…

Q: The number of students, in a class of 35, who improve their score from the first midterm to the…

A: Since we know that discrete variable : A variable which takes particular value , generally integral…

Q: A student must have an average​ (the mean) on five tests that is greater than or equal to​ 80% but…

A: Let x be the range of grade in fifth test.

Q: The systollc blood pressure (BP) of adults In the USA Is nearly normally distributed with a mean of…

A: Given Data Population Mean,μ = 121.0 Population Standard Deviation,σ = 15.0

Q: A pearson test statistic of .876 with a criticial valur of 0.361 would suggest what:   A.…

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Q: Using the midpoints of the indicated ranges of X; (i.e, 1.90 gram for the first class), to Xi fi 2…

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

Q: A recent study indicated that 20% of 133 women over age 55 in the study were widows.  a. How large a…

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Q: A random sample of medical files is used to estimate the proportionp of all people who have blood…

A: a) There is no preliminary estimate for p. Let us consider, p=0.5 Given margin of error, E=0.05…

Q: Then the mean number (to the nearest whole number) of students who will finish the exam in less than…

A: The distribution function is defined as F(x) = P(X ≤ x) Let p be the probability that a student…

Q: Mean of 100 items is found to be 30. If at the time of calculation two items are wrongly taken as 32…

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Q: The correlation of the relationship between the number of reaches into the bag and the number of…

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Q: The mean age of a class of twenty-five students is 23.8 years. How old would a twenty-sixth student…

A: The mean age of a class of twenty-five students is 23.8 years. The formula to calculate the mean…

Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

A: We have given that  Population proportion p=1%=0.01 Sample size n =4400

Q: A car on a test rack accelerates from 0 ft/s to 132 ft/s in 8 seconds. The car's velocity at time t…

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Q: A certain tennis player makes a successful serve 80% of the time. Suppose the tennis player serves…

A: Given : A certain tennis player makes a successful serve 80% of the time. assume that tennis player…

Q: Which of the following is(are) TRUE? * I. Based on the sample of 654 young adults, a point estimate…

A: From the output, 95% confidence interval is, (13.572, 15.872) Interpretation: There is a 95% chance…

Q: Suppose X~N(193,6) and Z~N(0,1). If z = -1.12, what is it on an X scale? Express your answer to two…

A: Given, X ~ N(193,6) Z ~ N (0,1) μ = 193 σ = 6       To  find, If Z = -1.12, what is it on an X…

Q: A random sample of medical files is used to estimate the proportion p of all people who have blood…

A: Margin of error(E), E=z×p×qn From the above E, find n, n=zE2×p×q Here, E=0.04 There is no…

Q: 2 = If µ(x) = 8 for 0sxs100 find the mean, mode and median of the age 100-x 400-x death of a…

A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, as per…

Q: The graph to the right depicts IQ scores of​ adults, which are normally distributed with a mean of…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

A: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

Q: Suppose that X1, X2,... Xn are n values of a variable X and X is the arithmetic mean. Can we obtain…

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Q: The area under the normal curve between z = 0 and z =- 1 is the area under the normal curve between…

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Q: Suppose that Max is a climate change scientist and butterfly enthusiast. In Max's locale, the mean…

A: The distribution is normal and the population standard deviation is unknown so the t distribution…

Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

A: Given: Sample size, n =4400 p=1%=1100=0.01 (a) Mean of p: Mean (μp)=p=0.01μp=0.01 The mean of p is…

Q: A researcher at a major clinic wishes to estimate the proportion of the adult population of the…

A: We have to find correct answer for given question..

Q: The recidivism rate for convicted sex offenders is 8%. A warden suspects that this percent is…

A: Given Information: Hypothesized value of population proportion p0=0.08 Sample size n=321 Out of…

Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

A: Given Data population proportion,p = 0.01 sample size n = 4400 mean of the…

Q: Suppose X~N(179,8) and Z~N(0,1). If z = -1.58, what is it on an X scale?  Express your answer to two…

A: Given: X ~ N(179, 8) and Z ~ N(0, 1)z=-1.58

Q: A car on a test rack accelerates from 0 ft/s to 132 ft/s in 8 seconds. The car's velocity at time t…

A: Acceleration  is defined as rate of change of velocity. Hence, acceleration, a = dv/dt = Δv/Δt

Q: Consider that the relation between the cost of production, the lot of size production and the number…

A: From the given information, Y: Cost of production X1: lot of size production X2: number of labors…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 210 and a standard…

A: Given  mean of 210 and a standard deviation of 54.

Q: For SRSWOR (N,n), find the ratio estimator of population mean. Show that the estimator is biased

A: Given information: The population size is N. The sample size is n. The sample is selected using…

Q: More shoppers do the majority of their grocery shopping on Saturday than any other day of the week.…

A: Solution: Given information: n1= 200 Sample size of age group under 35n2=200 Sample size of age…

Q: A deck has "b" black cards and "y" yellow cards. Given that cards are drawn at a random fashion…

A: Solution: From the given information, a deck has “b” black cards and “y” yellow cards. Given that…

Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

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Q: The mean of the numbers (x₁, x2, x3,...,xn) is . x. Show that the sum of the deviations about the…

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Q: Find the relative error if is approximated to 0-667. 3

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Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

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Q: If you pick 6 fruits at random, then 16% of the time, their mean weight will be greater than how…

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Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

A: Given that  p =0.01 , n =4400

Q: Suppose the mean and standard deviation of the GPAs of all currently registered students at a…

A: Given data,Mean μ=2.70sd     σ=0.50Antionio’s z score = -0.62Beatrice’s z score = 1.28What are their…

Q: The graph to the right depicts IQ scores of​ adults, which are normally distributed with a mean of…

A: Given data,μ=100σ=15P(X>x)=0.65x=?

Q: faculty cars have ages with a mean of 6 years and evel to test the claim that student cars are older…

A: Let X1 be the student car's age. x¯1: Sample means of student cars age= 7.2 s1 : Sample standard…

Q: The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the…

A: Introduction - If p^ is normally distributed  mean of p^=p Standard deviation of p^=pqn where ,…

Q: In interval estimation, as the sample size becomes larger, the interval estimate     becomes…

A: Introduction: The width of the confidence interval depends upon several factors.

Q: A student must have an average (the mean) on five tests that is greater than or equal to 80% but…

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Q: A researcher gives a depression scale to 300 people now, 6 weeks later, and 6 months later. She…

A: The depression scale is reliable because it is giving the same mean 6 weeks later and 6 months…

Q: Suppose 4, and 4, are true mean stopping distances at 50 mph for cars of a certain type equipped…

A: Given data: 95% CI is given as: