A teacher claims that their students are missing more than 10% of the assignments for the third quarter. We take a random sample of 25 students and see that 12% of their assignments are missing. Using a = 0.05, can we support the teacher's claim? Perform a normal distribution rejection region hypothesis test for proportions. Show all seven steps.

Q: In a random sample of eleven people, the mean driving distance to work was 18.2 miles and the…

A: Confidence intervals are used to study the range where the population parameter is likely to occur.…

Q: To estimate the average cost of maintaining houses in CA, a home warranty company randomly samples…

A: n=200Standard deviation =$550Mean =$950CI=98%

Q: A simple random sample of 420 individuals provides 132 Yes responses. (a) What is the point estimate…

A: From the provided information, Sample size (n) = 420 From which 132 responses yes that is x = 132

Q: Find the mean and variance using the following parameters of a binomial distribution, n = 32 and…

A: Answer: From the given data, The parameters of a binomial distribution are given as, n = 32 p = 0.26

Q: Suppose 242 subjects are treated with a drug that is used to treat pain and 50 of them developed…

A: claim : p > 0.20n = 242x = 50α = 0.10

Q: A 35% discount on a smart phone amounts to $665. What is the phone's list price?

A: Discount = $ 665 = D Discount = 35 % =d =0.35

Q: ople or more 18. The lifetime of a flashlight battery is normally distributed with a mean = 35.6 hr…

A: The lifetime of a flashlight battery is normally distributed with a mean = 35.6 hr with standard…

Q: You are conducting a multinomial Goodness of Fit hypothesis test for the claim that the 4 categories…

A: Answer  Given  Total = 19+45+30+40 = 134 Expected value:  0.2*134 = 26.8 0.4*134=53.6 0.1*1.34 =13.4…

Q: Treatment Treatment Treatment A B с 32 45 35 30 44 38 30 45 37 26 47 38 32 49 42 Sample mean 30 46…

A: x¯A=30, x¯B=46LSD=3.23

Q: A simple regression model was fitted to estimate the credit score of customers based on their…

A: From the above histogram we can see that, the tail of the histogram is on right side. So the data is…

Q: to the binomial dist test two-tailed, left-tailed, or right-tailed? eft-tailed test tight tailed…

A: Sample size n =294 Favorable cases x =27 Sample proportion p^=x/n  =27/294 =0.0918

Q: In a poll, 1100 adults in Nantucket were asked about their computer gaming habits. One finding was…

A: n = 1100 p^ = 0.43 95% ci for p = ?

Q: A data set includes data from student evaluations of courses. The summary statistics are n=97, x=…

A: According to the given information in this question We need to find the p value

Q: Exercise 5.4.1. Let Z~Nor (0, 1) and define X₁ = Z and X₂ = Z². Compute rp (X₁, X₂), (XX.) and r. (Y

A: Z~Nor0,1

Q: 6.59 US Postal Service's performance. The US Postal Service (USPS) reports that 95% of first-class…

A: Confidence level =0.95 Number of successes, x=282200a Sample size, n=332000

Q: A data set includes weights (in grams) of 37 Reese's Peanut Butter Cup Miniatures. The accompanying…

A: claim : μ = 8.953n = 37α = 0.05we have to identify correct hypothesis.

Q: social worker surveys a group of 100 high school students and asked them to indicate how many days a…

A: A social worker surveys a group of 100 high school students and asked them to indicate how many days…

Q: a. How many ways are there to pass out 13 cards to each of the two players? b. What is the…

A: Suppose that a deck of 52 cards contains 26 red cards and 26 black cards (and assume the red cards…

Q: Using an ? = 0.04, a confidence interval for a population proportion is determined to be 0.55 to…

A: Answer  Given  level of significance [α] =0.04 a confidence interval for a population proportion is…

Q: The following statistics represent weekly salaries at a construction company. First quartile $485…

A: Answer:- From the above information,  The mean weekly salary at a construction company is $660…

Q: A grocery store manager did a study to look at the relationship between the amount of time (in…

A: n= 9 observation  x y (x-x) (y-y) (x-x)(y-y) (x-x)2 (y-y)2 5 48 -13.7778 -23.7778 327.6049…

Q: Question 1B Row Labels Average of Minutes Std Dev of Minutes KEN, ETH Other USA (blank) Grand Total…

A: The summary statistics for Nationality, Nationality by Gender and Nationality by Year are given.

Q: Based on their experience with their packaging machine, a manufacturer of breakfast cereal believes…

A: For the distribution of the weight (in ounces) of cereal boxes, it is specified that the mean μ=16…

Q: the interpretation of the confidence level

A: From the above calculation we have 90% confidence interval is (−0.068, 0.118).

Q: 110. Does the lifespan of a shark depend on the species of shark? It is known that the lifespan…

A: Null Hypothesis: H0: The four species of shark have same means. Alternative Hypothesis: H1: The…

Q: Mean= Variance= B Standard Deviation= 19 20 21 Find the mean, variance, and standard deviation of…

A: Given that  Probability distribution table x 19 20 21 22 23 P(x) 0.24 0.23 0.31 0.11 0.11…

Q: reenblue Energy uses regression analysis to predict the Delivery Costs.   Recent results are as…

A: Constant $15,685 Standard error of Y estimate $3,500 r2 = 0.7832 Number of observations is 20. X…

Q: Find the P-value for the indicated hypothesis test with the given standardized test statistic, z.…

A: two tailed test Z = -1.65 α = 0.05

Q: Find the mean for the given data set, 33,46,79,26,85

A: Answer: From the given data, 33,46,79,26,85 Sample size(n) = 5

Q: critical value for this hypothesis test would be decimal places. Round to two

A: Many franchisers favor owners who operate multiple stores by providing them with preferential…

Q: Find the range for the given data set, 34,23,56,73,82,19,22,43,17,33

A: Answer: From the given data, 34,23,56,73,82,19,22,43,17,33 Sample size(n) = 10

Q: Find the mean and variance for the binomial distribution, Sample size (n) = 22 and P=0.28

A: Answer: From the given data, Sample size(n) = 22 P = 0.28

Q: If you roll a 6-sided die 6 times, what is the best prediction possible for the number of times you…

A: When rolling a fair 6-sided die, the probability of rolling an even number is 1/2, and the…

Q: Assume the random variable X has a binomial distribution with the given probability of obtaining a…

A: n = 4 p = 0.7 P(x>3) = ?     binomial distribution

Q: In a random sample of six people, the mean driving distance to work was 24.9 miles and the standard…

A: The sample size: n=6 Sample mean: x¯=24.9 miles Standard deviation: s=7.9 Confidence level: C=0.99…

Q: The claim is that weights (grams) of quarters made after 1964 have a mean equal to 5.670 g as…

A: From the provided information, Sample size (n) = 38 Test statistic (t) = -2.372 Level of…

Q: baseball team claims that the mean length of its games is less than 1.4 hours. State Ho and H, in…

A: The claim is that the mean length of a basketball game is less than 1.4 hours.

Q: Hi when doing probability test : 1. Everything else being equal how would an increase in sample…

A: 1. Everything else being equal how would an increase in sample affect the standard error of the…

Q: Consider the probability that 5 students in a calculus class with 400 students were born on the day…

A: n=400, x=5

Q: 9. If we omit a variable from a regression that is negatively correlated with the included…

A: If a variable that is negatively correlated with the included variables is omitted from a…

Q: Suppose that X is a normally distributed with a mean 33 and standard deviation 12 find the given…

A: Answer: From the given data, Mean (μ) = 33 Standard deviation(σ) = 12 X follows normal distribution,…

Q: these where the reuslts which i have on how many people where diagnosed with type 2 diaabtes over…

A: To construct a chi-squared test, you need to compare the observed values to the expected values…

Q: correctly write out the estimated equation and comment on the significance of the predictors of…

A: INT GDP INV 9 3 26 8 4 33 5 2 23 2 4.5 36 6 3.2 29 3 2 20 10 3 24 4 5 40 2 4.5 36…

Q: Mein commute time in Atlanta, in minutes, using the data in CommuteAtlanta with n = 500, x bar =…

A: Sample size, n=500 Sample mean, x¯=29.11 Sample sd, s=20.72

Q: A sleep researcher is assessing the impact of melatonin supplements on time to fall asleep for…

A: The data collected are displayed below together with some descriptive statistics: Melatonin 72…

Q: Which interval would be preferred in the previous two problems?

A: The researcher was able to get 200 volunteers for the medicine. The average blood pressure of the…

Q: Quiz vs Lecture Pulse Rates Do you think your pulse rate is higher when you are taking a quiz than…

A: n1= 10 Sample size of  Quize n2=10 Sample size of   Lecture x1= 68.8 Sample mean  of  quize x2=66.1…

Q: Consider a drug that is used to help prevent blood clots in certain patients. In clinical trials,…

A: Given n = 5762 x = 165

Q: Identify the type I error and the type Ill error for a hypothesis test of the indicated claim. The…

A: The percentage of adults who retire at the age 65 is equal to 62%

Q: A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements…

A: The study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements…