What proportion of scores falls below x = 35 in a normal distribution where H= 65 and o = 12? Round your answer to four decimal places. %3D Type your response
Q: 1. z = 0.44 Z = -0.84 Z = 1.28 2.
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A: Consider X denotes the IQ score. X~Nμ=100,σ=15
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A: Given that, Mean = 100 Standard deviation = 15 (Left tailed)
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A: P(400<X<600)=?
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Q: Assume that the total score (from both teams) for college football games averages u = 42 points per…
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Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…
A: normal distribution μ = 100σ = 15 P(85<x<110) = ?
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A: Givenz-score(z)=3.75x=19.6standard deviation(σ)=1.2
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Q: M= 90 SD= 7.8 What raw score is needed to be in the top 8%?
A: *Mean μ=90SD σ=7.8Top 8%⇒P(X>x)=0.08⇒P(X≤x)=092Corresponding z-score is obtained as
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A: Step 1:Given that :mean(μ)=100Standard deviation(σ)=15Let X is the IQ score of adults .We want the…
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Q: 6. Find the variance if X~N(0, ¿) and 95% of the data are between -7 and 7.
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Q: Find the z-scores for which 95% of the distribution's area lies between -z and z. Click to view page…
A: a) The area between two boundaries is 95%. In, the remaining percentage 5% (=100%–95%) area, 2.5%…
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A: For the given data perform z test for two proportion test
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- What value corresponds to the 30th percentile?The following histogram shows the exam scores for the pre algebra class. Use this histogram to answer the questions. Find the class width for this histogram.The results for a blood test for a certain disease are shown in the table below. Based on the table, what is the prevalence of the disease? T+ T- Total D+ 290 10 300 D- 3219 481 3700 Total 3509 491 4000 A. 0.09 0.97 O B. 0.0725 290 Screenshot
- HI T F. %24 E Z. Find the margin of error for the given values of c, s, and n. c = 0.98, s= 2.9, n = 21 Click the icon to view the t-distribution table. The margin of error is (Round to one decimal place as needed.) Enter your answer in the answer box and then click Check Answer. All parts showing Clear All Check Answer e Type here to search 查。 F1 F2 F3 F4 F5 %23 & 3. 4. 9.Please don't forget to roundCalculate the 25th percentile of the data shown x 1.8 2.3 6.7 11.3 16.7 25.2 26.9 27.9 I need help
- Find the z-score that has 68.4% of the distribution's area to its right. Can you also give the steps in the calculator? TI-84what is the mean when pi= 0.25 and n=40?A survey was conducted two years ago asking college students their top motivations for using a credit card. You think this distribution has changed. You randomly select 425 college students and ask each one what the top motivation is for using a credit card. Can you conclude that there has been a change in the distribution? Use a = 0.025. Complete parts (a) through (d). Response Old Survey % 29% New Survey Frequency, f Rewards 110 Low rates Cash back Discounts 23% 96 21% 109 7% 46 Other 20% 64 O B. The distribution of motivations is 110 rewards, 96 low rate, 109 cash back, 46 discounts, and 64 other. O C. The distribution of motivations is 29% rewards, 23% low rate, 21% cash back, 7% discounts, and 20% other. Which hypothesis is the claim? o Ho (b) Determine the critical value, Yo, and the rejection region. X = 11.143 (Round to three decimal places as needed.) Choose the correct rejection region below. Oc. XA survey was conducted two years ago asking college students their top motivations for using a credit card. You think this distribution has changed. You randomly select 425 college students and ask each one what the top motivation is for using a credit card. Can you conclude that there has been a change in the distribution? Use a =0.05. Complete parts (a) through (d). Response Old Survey % 27% 23% 22% New Survey Frequency, f O 112 Rewards Low rates Cash back Discounts Other 96 108 7% 47 21% 62 (b) Determine the cntical value, Xo, and the rejection region. X =(Round to three decimal places as needed.) Choose the correct rejection region below. O B. X>x OD. XSave Suppose a random sample of n = 390 teenagers 13 to 17 years of age was asked if they use social media. Of those surveyed, 276 stated that they do use social media. Find the sample proportion of teenagers 13 to 17 years of age who use social media. The sample proportion is p= (Round to three decimal places as needed.)Use the standard normal table to find the z-score that corresponds to the given percentile. If the area is not in the table, use the entry closest to the area. If the area is halfway between two entries use the z-score halfway between the corresponding z-scores. If convenient, use technology to find the z-score. P 25 Click to view page 1 of the table. Click to view page 2 of the table. The z-score that corresponds to P25 is (Round to two decimal places as needed.)SEE MORE QUESTIONSRecommended textbooks for youMATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
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