What is the P(t < -1.2) with a sample size of 12. 2. What is the P(−2.4
Q: Suppose you sample 2 students from every classroom where a class is being held at Harvard University…
A: If a random sample of size n is taken from a population having mean and standard deviation then,…
Q: According to a recent U.S. Bureau of Labor Statistics report, the proportion of married couples with…
A: In inferential statistics, sampling distribution of a statistic is a vital concept. It represents…
Q: The graph of the waiting time (in seconds) at a red light is shown below on the left with its mean…
A: Given data: Sample size (n) = 100 Mean = 16.8
Q: How hard is it to reach a businessperson by phone? Let p be the proportion of calls to…
A: Given that Margin of error =E =0.054 80% confidence level.
Q: The variance of the sampling distribution of the proportion is, 0.63(1-0.63) 600 = 0.0004 The…
A: The variance of the sampling distribution of the proportion is,
Q: K Dok A researcher wishes to estimate, with 95% confidence, the population proportion of families…
A: Given that Margin of error =E =5%=0.05 95% confidence.
Q: d. ni=35, n2 = 40; both samples are approximately Normal, sample 2 has two outliers. It is safe to…
A:
Q: 8. What does the number 0.05 represent in the following: t(58) = 2.001, p < 0.05? 9. How many groups…
A: (8) The information provided in the question are as follows : t(58) = 2.001, p < 0.05 The number…
Q: Fill in the blanks to complete the following statements. (a) For the shape of the distribution of…
A: From the provided information, The condition need to be known for which the shape of the…
Q: Suppose the mean wait-time for a telephone reservation agent at a large airline is 41 seconds. A…
A: Given μ=41, n=250, x¯=40.2, s=4.3
Q: A popular travel website wants to know the proportion of visitors that prefer warm over cold…
A: Option 4: Inference about a proportion is the objective. While it's stated that the travel website…
Q: What is the P(−2.4<t<2.4)P(-2.4<t<2.4) with a sample size of 6.
A: Given information Sample size n = 6 Degrees of freedom = n – 1 = 6 – 1 = 5
Q: Suppose an x-distribution has mean ? = 2. Consider two corresponding x distributions, the first…
A: Solution-: Suppose an x-distribution has mean=2, n=49,n=81 (a) What is the value of the mean of each…
Q: Use technology to help you test the claim about the population mean, μ, at the given level of…
A: The following information has been provided. Hypothesized population = 1190 Sample mean= 1214.93…
Q: Use the Student's t-distribution to find the t-value for each of the given scenarios. Round t-values…
A: As per company guidelines I solved exactly three subparts of the question.thank you
Q: Suppose a simple random sample of size n=81 is obtained from a population with a mean of 88 and a…
A: Given sample of size n=81 mean=88 standard deviation =27.
Q: A sample of 50 people are selected at random from a population and it is found that 12 people in…
A: Given a sample of 50 people are selected at random from a population and it is found that 12 people…
Q: 16. Ages of College Students The dean of students wants to see whether there is a significant…
A:
Q: According to a survey in a country, 38% of adults do not own a credit card. Suppose a simple random…
A: The following solution is provided below
Q: Suppose n=48 and p=0.15 a) Can we approximate the sample proportion distribution (p̂) by the normal…
A:
Q: The mean age for all Foothill College students for a recent Fall term was 33.2. The population…
A: Solution X = the age of a Winter Foothill College student. X bar=30.4 Sigma=15 n=25
Q: Fill in the blanks to complete the following statements. (a) For the shape of the distribution of…
A: For the shape of the distribution of the sample proportion to be approximately normal, it is…
Q: Suppose that we will randomly select a sample of n = 100 elements from a population and that we will…
A: Given: Population proportion, p=0.9 Sample size, n=100 Concept: Here we use Normal approximation to…
Q: Q4. Suppose you want to test the claim that mean > 25.6. Given a sample size of n= 59 and a level of…
A:
Q: A vending machine company wants to check three of its machines to determine if they are properly…
A: Hypothesis: The null and alternative hypotheses are given below: H0: There is no difference in the…
Q: 13. x: 471.7 659.3 740.5 790.5 781.3 1047.3 969.5…
A: Total deviation is the square root of the sum of the explained and unexplained deviation, usually…
Q: Differences between Proportions
A: Provided information is, The percentage of males 18 years old and older who never married is 30.4.…
Q: What is the standard deviation of p-hat, the sample proportion? a. np(1-p) b. sqrt(n(1-p)) c.…
A: Defines that p is population proportion.
Q: ******* cording to a survey in a country, 38% of adults do not own a credit card. Suppose a simple…
A:
Q: A sample of 3 measurements are taken and recorded: x = 8, y = 10 and z The sample mean is: x %3D…
A: Given: x=8,y=10,z=7x=x+y+z3=8.33
Q: Determine the nonrejection region.
A: The graph portrays the decision criterion for a one-mean z-test. Given graph is for decision…
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:
Step by step
Solved in 4 steps
- 79. What is the 90% confidence interval for the difference in population proportions, p1 – p2 , given the following sample data: [-0.0772 , 0.1172] [-0.0499 . 0.0899] [-0.0710 , 0.1110] [-0.0603 , 0.1003]R4Q2. 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.
- In a one - sample t-test, the results are as follows: t(31) = -3.41, p <0.01. How many data points were there in the analysis that produced this result? 30 31 32 O 29To better understand how husbands and wives feel about their finances, Money Magazine conducted a national poll of 1010 married adults age 25 and older with household incomes of $50,000 or more (Money Magazine website, December 14, 2014). Consider the following example set of responses to the question, “Who is better at getting deals?” Who Is Better? Respondent I Am My Spouse We Are Equal Husband 278 127 102 Wife 290 111 102 Develop a joint probability table and use it to answer the following questions. Construct the marginal probabilities for Who Is Better (I Am, My Spouse, We Are Equal). Comment. Given that the respondent is a husband, what is the probability that he feels he is better at getting deals than his wife? Given that the respondent is a wife, what is the probability that she feels she is better at getting deals than her husband? Given a response “My spouse” is better…19 Consider the middle interval in the sampling distribution of ?̅: 0.430 0.500 where ?̅ is obesity rate in the random samples of adult males in the age group 50-59. Given α = 0.05, what is the sample size ? in this sampling distribution? a 895 b 836 c 781 d 730
- 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].What is the P(−2.5<t<2.5) with a sample size of 5.Q1. An anthropologist wants to collect data to determine whether the two different cultural groups that occupy an isolated Pacific Island grow to be different heights. The results of his samples of the heights of adult females are as follows Group A n = 120 Group B n= 150 X,= 62.7 X, = 61.8 S1= 2.5 S2 = 2.62 Do these samples constitute enough evidence to reject the null hypothesis that the heights of the two groups are the same? Set alpha to .05. 1. What are the appropriate null and alternative hypothesis? A. Ho: µ1 – µ2 # 0_H;:µ1 – Hz = 0 B. Họ: H1 – H2 >0 H;: H4 – Hz 0 D. Ho: µ1 – µ2 = 0 H;: µ1 – H2 # 0 E. None of these. 2. What is the Test statistics? A. Z = x-y-Do В. Z %3D x-y-Do C. T = -y-Do D.T = D-Do E. T = x-y-Do 1 Sp +- Vn1 'n2 SD n1 n2 n1 n2 n1 n2 3. What is the value of the test statistic? A. T = 2.82 B.T = 9.20 C.Z = 9.20 D.T = 1.44 E.None of these 4. For a significance level of 0.05, what is the critical value? A. Z0.05 = 1.645 B.to.025 = 1.960 C. to.05 = 1.645 D.zo.025 =…
- State the conclusion Ho There is evidence to conclude that the population mean waiting time is different from 38 minutes b. Because the sample size is 64, do you need to be concerned about the shape of the population distribution when conducting the t test in (a)? Explain Choose the correct answer below. O A. No, because n is equal to 64, the sampling distribution of the t test is approximately normal In general, the t test is appropriate for this sample size unless the population is skewed O B. No, because n is equal to 64, the sampling distribution of the t test is approximately normal In general, the t test is appropriate for a large sample size OC. Yes, because n is equal to 64, the sampling distribution of the t test cannot be determined. In general, the t test requires a larger sample size O D. Yes, because n is equal to 64, the sampling distribution of the t test cannot be determined In general, the t test is only appropriate for a normally distributed sampleAccording to a survey in a country, 38% of adults do not own a credit card. Suppose a simple random sample of 500 adults is obtained. Complete parts (a) through (d) below. (a) Describe the sampling distribution of p, the sample proportion of adults who do not own a credit card. Choose the phrase that best describes the shape of the sampling distribution of p below. OA. Approximately normal because n ≤0.05N and np(1-p) 10 Determine the mean of the sampling distribution of p. H₂ = (Round to two decimal places as needed.)
