A certain model of car can be ordered with either a large or small engine. The mean number of miles per gallon for cars with a small engine is 6.8. An automotive engineer thinks that the mean for cars with the larger engine is higher than this. State the appropriate null and alternate hypotheses. The null hypothesis is Hou (Choose one) ▼ The alternate hypothesis is H₁ μ (Choose one) ▼ X S
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- An oil brand claims that the average mileage with one gallon of their gasoline is 25mi. You recorded the mileage of 10 independent cars with a gallon of said gasoline and obtained an average of 23.7mi. You want to determine if this is enough evidence to say that the brand is overestimating. What is the alternative hypothesis for this problem? a. u 25 c. d. u = 23.7 u #25A study conducted to see if teenagers drive at faster average speeds than the general population of drivers. The average speed of the driving population is 45mph. The null hypothesis is Ho=uaverage driving speed of teenagers = 45 mph. What is the alternative hypothesis?Identify the IV and the scale of measurement; Identify the DV and the scale of measurement and for the IV – identify the # of levels; Identify null and alternative hypotheses, are they directional or non-directional? A new diet pill is expected to increase the percentage of weight lost. Four groups of women are selected. Women in Group 1 (n = 10) are given 5 mg of the drug, those in Group 2 (n = 10) are given 10 mg of the drug, Group 3 (n = 10) gets 15 mg, and women in Group 4 (n = 10) are given a placebo (control). The women are asked to record the percentage of weight lost after taking the pill daily for 6 months.
- A friend who hears that you are taking a statistics class asks for help with a chemistry lab report. She has made four independent measurements of the specific gravity of a compound. the results are: 3.82, 3.93, 3.67, and 3.78 Your friend still needs more help with his lab report. the lab manual also asks whether the data show convincingly that the true specific gravity is less than 3.9. e) state the null and alternative hypotheses used to answer this question f) calculate the test statistic g) calculate the P-value h) state your conclusionBased on the statement “Can you conclude that the mean wind speed when it is less than 12m/s? Use α = 0.10.”, it is a _______. I. One tail test on the right-hand side II. One tail test on the left-hand side III. Two tails test on both right-and-left hand sidesThe proportion of people who live after fighting cancer is 0.75. Suppose there is a new therapy that is used to increase the survival rate. Use the parameter p to represent the population portion of people who survive after fighting cancer. For a hypothesis test of the therapy’s effectiveness, researchers use a null hypothesis of p = 0.75. Pick the correct alternative hypothesis. 1. p > 0.75 2. p < 0.75 3. p 6= 0.75
- I would like to ask Qb. I think it's using the normal approximation to calculate the answer but I can't.Heights (cm) and weights (kg) are measured for 100 randomly selected adult males, and range from heights of 136 to 190 cm and weights of 39 to 150 kg. Let the predictor variable x be the first variable given. The 100 paired measurements yiel x= 167.51 cm, y = 81.36 kg,r= 0.232, P-value = 0.020, and y = - 103+ 1.13x. Find the best predicted value of y (weight) given an adult male who is 153 cm tall. Use a 0.01 significance level. The best predicted value of y for an adult male who is 153 cm tall is kg. (Round to two decimal places as needed.)A WebAssign - SP21 A Section 7.2: Estimating u When a X A 07.06 WebAssign: Section 7.2: Es X + A webassign.net/web/Student/Assignment-Responses/last?dep=23798469 ABP E student.fz.k12.mo.us bookmarks Future Plans Tyler Student M É AP Students - Coll. A Launch Dashboard Canvas Dashboard Calendar 00 Duolingo * MackinVIA ap stats book WA ap stats assignmen. >> (b) Using the given data as representative of the population of prices of all summer sleeping bags, find a 90% confidence interval for the mean price µ of all summer sleeping bags. (Round your answers to two decimal places.) lower limit $4 upper limit $4 Submit Answer 3. [-14 Points] DETAILS BBUNDERSTAT12HS 7.2.016.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Express, The Fudge Company, Karmel Corn, and Rocky Mountain Chocolate…
- Your local gas company is interested in estimating the average usage during the month of January. A random sample of 1280 households found the following results: X= 82 therms and s=28 therms. Conduct a test of hypothesis to determine if the average amount exceeds 80 therms. Use a=0.02.What is the inmportant difference between Parameters and Statistics? Parameters are knowable, but statistics are typically unknown. Statistics are knowable, but parameters are typically unknown Statistics are more reliable than parameters. Parameters are easier to measure than statistics.The null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. What parameter is being tested? Ho: H = 120 H,: H # 120 Is the hypothesis test left-tailed, right-tailed, or two-tailed? Left-tailed test Two-tailed test Right-tailed test What parameter is being tested? Population mean Population standard deviation Population proportion