Each person in a random sample of 221 male teenagers and a random sample of 302 female teenagers was asked how many hours he or she spent online in a typical week. The sample mean and standard deviation were 15.3 hours and 11.3 hours for males and 14.3 and 11.7 for females. (Use a statistical computer package to calculate the P-value. Use ?males − ?females. Round your test statistic to two decimal places, your df down to the nearest whole number, and your P-value to three decimal places.) t =   df =   P =

Q: Find the standard deviation of the data: 22, 29, 21, 24, 27, 28, 25, 36 O a. 4.8 O b. 2.8 O C. 4.2 O…

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Q: Find the z-score for the value 62, when the mean is 56 and the standard deviation is 2. O A. z=3.00…

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

Q: Find the mean, the median, and the mode of the following scores. (If an answer does not exist, enter…

A: Solution: x(1) Frequency (f)(2) f⋅d(4)=(2)×(3) cf(6) 50 2 -2 -4 2 60 5 -1 -5 7 70=A 9 0 0…

Q: Find the z-score for the value 82, when the mean is 98 and the standard deviation is 3. OA. 2= -567…

A: From the provided information, Mean (µ) = 98 Standard deviation (σ) = 3 X~N (98, 3)

Q: Find the​ z-score for the value 87​, when the mean is 82 and the standard deviation is 8. A. z=−0.96…

A: Given,mean(μ)=82standard deviation(σ)=8and the value(x)=87

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Q: A medical lab tested a sample of 8 vials of blood for acidity on the pH scale.  Use this data to…

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Q: One sample with n = 4 scores has a mean of M = 12, and a second sample with n = 6 scores has a mean…

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Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

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Q: The director of research and development is testing a new medicine. She wants to know if there is…

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Q: ence in mean life. Which brand would you prefer, based on this calculation? Car Brand 1 1 36,925…

A: Given : The data on two brands of radial tires is provided below. Car Brand 1 Brand 2 1 36925…

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

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A: Given data 0,0,1,1,2,4

Q: The following data give the prices (in thousands of dollars) of 6 homes that were sold in a small…

A: Solution: Let X be the price. The given data is 195, 205, 219, 265, 283 and 825.

Q: Calculate the average (mean) of the data shown, to two decimal places x 29.2 4 9.9 5.9 21.4

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Q: Which of the following z scores are above the mean? Choose all that apply.     0     1.35…

A: For normal distribution, the mean is equal to 0

Q: The upper 50% of the data on this graph is within how many standard deviations from the mean?…

A: Given graph: The histogram indicates the distribution is approximately normally distributed.

Q: Find the medians. The median for males is beats per minute and the median for females is beats per…

A: Given: Male Female 86 66 91 86 56 92 68 90 83 79 60 89 61 90 72 77 63 95 74…

Q: q

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Q: Complete the Chart for the following set of data. The Mean of the data is 30. Only fill in the…

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Q: Use the following data for this exercise: 15 34 46 36 34 28 52 28 a. Calculate the mean, the median,…

A: Sample size  = n = 8. Data: 15, 34, 46, 36, 34, 28, 52, 28.

Q: he highway mileage (mpg) for a sample of 8 different models of a car company can be found below.…

A: The given sample is 30, 35, 22, 19, 29, 35, 27, 26.

Q: The mean finish time for a yearly amateur auto race was 186.77 minutes with a standard deviation of…

A: Formula for z score : z = x-μσ

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Q: what range of raw scores makes up the middle 40%

A: The middle 40% means, the scores lie between 30th and 70th percentile. From stand normal, z-score…

Q: 11q10 Find the 5 number summary for the data shown 20 24 25 30 33 41 42 44 56 65 76 79 89 92 5…

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Q: Find the mean, the median, and the mode of the following scores. (If an answer does not exist, enter…

A: Obtain the value of mean.   The value of is obtained below:   From the information, given that The…

Q: . A survey by the National Retail Federation found that women spend on average R146.on a Saturday…

A: given data normal distributionμ = 146σ = 29.44P(x<190)= ?

Q: The table below shows the frequency of AP Physics scores for a high school class. AP Score…

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Q: Race time X-H in hours For For X2 For X3 Write the values in each of the blanks above (note-for i,…

A: Given: Values are denoted by, 2.7,5.1, 4.2 Mean is given to be μ=4

Q: x 1.8 2.3 6.7 11.3 16.7 25.2 26.9 27.9

A: Percentile is the value in the data set below which certain percentage of the data lie.   The…

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Q: he scores on a test for a sample of 38 statistics students are summarized in the following table.…

A: students score(x) no. of students(f) fx 90 9 810 80 16 1280 70 13 910   n = 38 ∑fx = 3000…

Q: C2. GSS 2014 and GSS 2018 respondents were asked their opinion on whether homosexuals should have…

A: Given information: GSS 2014 and GSS 2018 respondents were asked their opinion on whether…

Q: The middle 50% of the heights are between what two values? Round to one decimal place.

A: Here Given, Assume that women have heights that are normally distributed with a mean of 63.6 inches…

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A: We have given that,  Population proportion (p)= 66% = 0.66 and favorable cases (X) = 717 , sample…

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A: Chebyshev's rule :  According to Chebyshev's rule, the probability that XX is within kk standard…

Q: Listed below are pulse rates (beats per minute) from samples of adult males and females. Find the…

A: Let us assume that the male is represented by x and female is represented by y.The data for x and y…

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Q: X 16.6 25 28.3 7.2 23.2 8.5 29.6 26.4

A: 16.6 25 28.3 7.2 23.2 8.5 29.6 26.4 Sample size n =

Q: The heights of women follow a normal distribution with a mean height of 63.7, and a standard…

A: Let x be the heights of women which follows normal distribution with mean 63.7, and standard…

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Q: If you have a known value of 16, which of the following is the best average of your data to verify…

A: Here  We have given a known value of 16 if we go through the option and find their lower and upper…