What is the P(t < -1.2) with a sample size of 12. 2. What is the P(−2.4
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1. What is the P(t < -1.2) with a
2. What is the P(−2.4<t<2.4)P(-2.4<t<2.4) with a sample size of 15.
(1)
Sample size (n) = 12
P(t<-1.2)
The degree of freedom is:
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Solved in 4 steps
- 4. Which proportion of a normal distribution is located between the mean and z = +1.40? 5. A vertical line drawn through a normal distribution at z = +2.11 separates the distribution into two sections, the body and the tail. Which proportion of the distribution is in the tail?Use the t-tables to determine a p-value or a range of p-values for the following test statistics: n 20 15 10 t 0.83 1.546 2.436 25 3.165 p-value < 0.0005 0.0005< p-val < 0.001 0.001 < p-val < 0.005 0.005< p-val < 0.01 0.01 < p-val < 0.05 0.05 < p-val < 0.1 0.1< p-val < 0.2 0.2< p-val < 0.5A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that you're interested in the mean score, 4, on this subsection among the general population. You decide that you'll use the mean of a random sample of scores on this subsection to estimate u. What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 2 of µ? Use the value 22 for the population standard deviation of scores on this subsection. Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.)
- Solve for numbers 4 and 5Fill in the blanks to complete the following statements. (a) For the shape of the distribution of the sample proportion to be approximately normal, it is required that np(1 -p) 2 (D) Suppose the proportion of a population that has a certain characteristic is 0.3. The mean of the sampling distribution of p from this population is u. = (a) For the shape of the distribution of the sample proportion to be approximately normal, it is required that np(1 - p) 2 (Type an integer or a decimal.)Q2. A laundry for car wash found that the average, for small size car, cleaning time is 5 mins in the morning and 6.5 mins at evening time when a sample of size 30 is taken at the two time periods. From the previous record, the laundry manager knew that car oj = 2 mins for the morning shift and oz = 2.5 mins for morning and evening repectively. Find the interval estimate for 4 - 42 with 90% confidence level.
- 2) In the year 2033, Kayla Faruq is leading emergency room doctor. Kayla is presently researching the relationship between stress and cardiovascular disease. Suppose systolic blood pressures of patients that are experiencing chronic stress is normally distributed with a mean of 140 and a standard deviation of 5.9.52. Multiple Choice If the calorie contents of robin eggs are normally distributed with a mean of 25 and a standard devia- tion of 1.2, then approximately 95% of all robin eggs should In have a calorie content in the interval ex (A) [21.4, 28.6]. (B) [22, 28]. (C) [22.6, 27.4]. (D) [23, 27]. (E) [23.8, 26.2].Describe the sampling distribution of p. Assume the size of the population is 20,000. n 800, p 0.356 Describe the shape of the sampling distribution of p. Choose the correct answer below. A. The shape of the sampling distribution of p is not normal because n s 0.05N and np(1 - p)< 10 В. The shape of the sampling distribution of p is approximately normal because ns0.05N and np(1 -p) 10 A С. The shape of the sampling distribution of p is approximately normal because ns0.05N and np(1 -p)2 10 D. The shape of the sampling distribution of p is not normal because ns 0.05N and np(1 -p)z 10. Determine the mean of the sampling distribution of p. (Round to three decimal places as needed.) HA р Determine the standard deviation of the sampling distribution of p. (Round to three decimal places as needed.) р
- The graph portrays the decision criterion for a hypothesis test for a population mean. The null hypothesis is H:H=Po: The curve Is the normal curve for the test statistic under the assumption that the null hypothesis is true. Use the graph to solve the problem. A graphical display of the decision criterion follows. 0.9- Do not reject H. Reject H, 0.8- 0.7 -0.6- 0.5- 034 10.005 413 3542s s 8 o59 03 1.is 17 136 2.576 Determine the rejection reglon. Submit Assignment Continue 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy AccessibilityUse the central limit theorem to find the mean and standard error of the mean of the indicated sampling distribution. Then sketch a graph of the sampling distribution. The per capita consumption of red meat by people in a country in a recent year was normally distributed, with a mean of 111 pounds and a standard deviation of 37.8 pounds. Random samples of size 19 are drawn from this population and the mean of each sample is determined. 1₂ = 0 ...Use the Central Limit Theorem to find the mean and standard error of the mean of the sampling distribution, Then sketch a graph of the sampling distribution. The mean price of photo printers on a website is $249 with a standard deviation of $57, Random samples of size 32 are drawn from this population and the mean of each sample is determined. The mean of the distribution of sample means is