Suppose that follows a chi-square distribution with 20 degrees of freedom. Use the ALEKS calculator to answer the following. (a) Compute P(12≤x≤31). Round your answer to at least three decimal places. P(12 k) =0.1. Round your answer to at least two decimal places. k=

Q: Suppose the timing device used in the men’s race failed to activate at the start of the race and…

A: The median of men's time is 1631.37.

Q: Suppose that 95% of the bags of certain fertilizer mix weigh between 49 and 53 pounds. Averages of…

A: The central limit theorem studies the nature of the sampling distribution of the sample mean when…

Q: P(z<2.25)=

A: Given Information: To find out Pz&lt;2.25

Q: A traffic light at a certain intersection is red 31% of the time, yellow 8% of the time and green…

A: Let x be the random variable that denotes the number of days that pass up to and including the first…

Q: feels that the commute in his city is less and wants to publicize this. He randomly selects 25…

A: The hypotheses are given as follows: Null hypothesis: µ=25.4. Alternative hypothesis: µ&lt;25.4.…

Q: In a population of N = 10 scores, the smallest score is X = 8 and the largest score is  X = 20. What…

A: According to the provided information, Smallest score = 8 Largest score = 20

Q: If z, and x be 2 values of a variable x and each of the remaining (n – 2) values be +), find the…

A:

Q: P(z < 2.56) =

A: Draw the graph that represents the area to the left of the normal curve.

Q: 20% of our Jadara university students feel that the bus system at the university is adequate. If 100…

A: Given that, n = 100, p = 0.20 The values of mean and standard deviation are,

Q: You follow 9 subjects with a sometimes fatal disease. Their follow-up times in months are as…

A: Given the follow-up times in months for 9 subjects with a sometimes fatal disease as 6+     10    12…

Q: Calculate  P(4.5 &lt; X).

A: P(4.5 &lt; X) means the probability of more than 4.5  For X&gt;4.5 we get two parts of the function…

Q: The life expectancy of a fluorescent light bulb is given by the number of hours that it will burn.…

A:

Q: A sample of n = 15 scores ranges from a high of X = 11 to a low of X = 3. If these scores are placed…

A: Given: Lowest value of X = 3 Highest value of X = 11

Q: Given the data points (2, 29.5), (5, 523), (7, 1807), and (11, 9853), find the value of f(x) if x =…

A:

Q: P(1.15 < Z < 2.77) =

A: X~N( 0 , 1 )   μ=0 , ?=1 (for standard normal distribution)   Z-score =( x - μ )/?

Q: Suppose X is time to take a portion of the SAT test and f(x) = x/8 from 0 to 4 hours. Find the mean…

A: The formula to obtain the value of mean is ,

Q: Let X denote the number of hours you study during a randomly selected school day. The probability…

A: Let X denotes the no. of hours you study during a randomly selected school dayP(X=x)=

Q: Calculate the coefficient of alienation.  Predict the Y

A: Given information: The data represents the values of the variables x = hours and y = quiz.

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

A:

Q: A survey asked 500 random people how often they use the bathroom on a daily basis. Nineteen percent…

A: Let X=the no.of times a person goes to the bathroom on a daily basis.

Q: The run times of a marathon runner are approximately normally distributed. The z-score for his run…

A: The run times of a marathon runner are approximately normally distributed.i.e. The z-score for his…

Q: Eighteen percent of apples grown in an orchard have defects. Let X = the number of apples that are…

A: Answer: From the given data,

Q: The value for x2 will have an upper tail area of 0.05. There are k = 3 populations and k - 1 = 2…

A: From the provided information, Degree of freedom = k – 1 = 3 – 1 = 2 Level of significance (α) =…

Q: 3. Find the geometric mean between 8x and x²/2.

A: Given: The expressions are 8x and x32 To find the geometric mean between 8x and x32 If the geometric…

Q: Starbucks wants to check how they are doing on their drive-thru pick up times.  The franchise owner…

A: Starbucks testing whether the pick-up time exceeds the 4 minute window or not. The test is…

Q: 1 b) For any data set, approximately 95% of the observations fall in the interval (T − 2s, T+2s).…

A:

Q: Twenty-four percent of executives say that older workers have blocked their career advancement.…

A:

Q: A light fixture contains five lightbulbs. The lifetime of each bulb is exponentially distributed…

A: The objective of the question is to find the probabilities and mean of the lifetime of lightbulbs…

Q: A company claims that the number of defective items manufactured during each run of making 100 of…

A: From the provided information, Sample size (n) = 100 Defective rate (p) = 0.03

Q: t has been suggested that gossiping about others may affect how likeable you are. Two groups of…

A: This study aims to examine the hypothesis that gossiping about others affects how likeable a person…

Q: A researcher collects data that represents the average number of hours of sleep in the last two…

A: We have given difference in sleeping hours for two groups and we have to find the t obtained and p…

Q: Use this information to construct the​ 90% and​ 95% confidence intervals for the population mean.…

A: Given that Sample size n = 74 Sample mean = 85.83 Population SD = 13.64 The critical value of Z at…