A researcher wants to test if the elementary school children spend less than 30 minutes per day on homework. A random sample of 64 children from the school shows that they spend an average of 24.5 minutes per day on homework. Assume that o = 15.3 minutes, and that the test is to be made at the 1% significance level. What is the value of the test statistic, z, rounded to three decimal places? -0.0327

Q: The table below lists the number of games played in a yearly best-of-seven baseball championship…

A: Solution To test the hypothesis that we will is use chi square test for goodness of fit.

Q: A Z-test for single population mean is conducted with Ha: µ < 10, at significance level of 0.05, The…

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Q: A sample is to be taken from a population with a mean of 214 and a standard deviation of 3. The…

A: Given: A sample is to be taken from a population with a mean of 214 and a standard deviation of 3.…

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A:

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A: Hypothesis test consist of two statements, they are null and alternate hypothesis. Null hypothesis…

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Q: What does brand loyalty mean to consumers? According to a recent research report, 39% of consumers…

A: Probability that a consumer associate trust with brand loyalty is; p = 39% = 0.39 (a) Given the…

Q: A researcher wishes to determine whether the blood pressure of vegetarians is, on average, lower…

A:

Q: 55,000, average male's salary under 6 foot tall of $47,000, with a p-value of 0.45.  Based on that…

A: Given: p-value=0.45 We usually take the significance level as 5%, i.e, 0.05. The decision rule…

Q: In a survey of 260 childless married couples who were asked if they plan to have children in the…

A: Solution

Q: A Pew Research Center survey asked respondents if they would rather live in a place with a slower…

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Q: alue for a right-tailed test using a significance level of ?=0.02.α=0.02

A: To find the z value, use the standard normal table to find the z-score which cuts off an area of…

Q: A bank has a policy that the proportion of loans made to people with more than $50,000 in debt…

A: Given: Formula Used:

Q: A premed student in statistics class wants to test the claim that the mean body temperature is less…

A: Given information- Population mean, μ = 98.6℉ Sample size, n = 12 Significance level, α = 0.05 We…

Q: A Z-test for single population mean is conducted with Ha: µ < 10, at significance level of 0.05, The…

A:

Q: A group of students estimated the length of one minute without reference to a watch or​ clock, and…

A: Given 78 90 46 74 48 33 70 69 78 59 75 77 100 100 75

Q: In a survey of 220 childless married couples who were asked if they plan to have children in the…

A:

Q: Use the pulse rates in beats per minute (bpm) of a random sample of adult females listed in the data…

A: GivenPulse rate (bpm) 44 88 66 87 81 54 69 86 53 48 63 65 50 101 63 89 41 59 67 65 42…

Q: A consumer group is investigating a producer of diet meals to examine if its prepackaged meals…

A: The hypotheses are given below:

Q: A college admissions officer takes a simple random sample of 90 entering freshmen and computes their…

A: The correct option is: C) No.Given information:

Q: Students in a high school statistics class are investigating the proportion of times a Hershey's…

A: We have to find correct conclusion from available options.

Q: With a = .05, what is the critical value for a paired-sample, one-tailed t-test with n 15? O t=…

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Q: The makers of Country Boy Corn Flakes are thinking about changing the packaging of the cereal with…

A: The given dataset is:   Cube cylinder pyramid Rectangle 116 111 78 166 82…

Q: A candy company taste-tested two chocolate bars, one with almonds and one without almonds. A panel…

A:

Q: A nutrition store in the mall is selling "Memory Booster," which is a concoction of herbs and…

A: Solution: Given information: n= 16 Sample size M= 24  Sample mean μ= 20  Population meanSS= 960 sum…

Q: At the .01 significance level, can we conclude that the mean weight is less than 9.0 grams? Identify…

A: Test is that whether the mean weight is less than 9.0 grams.

Q: d the critical value t, for the confidence level c= 0.95 and sample size n= 13. Click the icon to…

A: Given data,n=13df=n-1=12α=0.05t-critical value=?

Q: Consider the data below. Previous studies have shown that approximately 32% of women deliver…

A: Given information:Sample size (n) = 100Significance level = 0.05

Q: le )A poll of size 30 in a huge shopping mall found that 23 women wish to have an Q6. attraction…

A:

Q: A group of students estimated the length of one minute without reference to a watch or​ clock, and…

A: The hypotheses are given below: Null hypothesis: H0:µ=60 Alternative hypothesis: H1:µ≠60…

Q: Below are the number of calories in a random sample of seven 3-ounce servings of French fries.…

A:

Q: Use an appropriate test to determine the goodness of fit of the data at 5% level of significance for…

A: The hypotheses are; Ho: The distribution of number of heads is same as defined for the results from…

Q: Use the pulse rates in beats per minute​ (bpm) of a random sample of adult females listed in the…

A: x¯ = 65.05  s = 22.131 n = 50

Q: Rhino viruses typically cause common colds. In a test of the effectiveness of echinacea, 34 of the…

A: The proportion of subjects treated with Echinacea developed rhinovirus infections is, Thus, the…

Q: The population mean, according to a report is 20.4 minutes. To corroborate this, a sample of 15 data…

A:

Q: A cereal company claims that the mean weight of the cereal in its packets is 14 oz.  The weight (in…

A: Claim : mean weight of the cereal in its packets is 14 oz Sample size : n=8 Consider , x=weight of…

Q: How much is in that can? A machine that fills beverage cans is supposed to put 12 ounces of beverage…

A: Answer:-  Reject the null hypothesis.

Q: The police chief selects a sample of 50 local police officers from a population of officers with a…

A: It is given that the population mean (µ) is = 75. The population standard deviation (σ) is 8. The…

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Q: A Z-test for single population mean is conducted with Ha: µ < 10, at significance level of 0.05, The…

A:

Q: A consumer group is investigating a producer of diet meals to examine if its prepackaged meals…

A: The provided information is:

Q: The heights are measured for the simple random sample of supermodels Crawford, Bundchen, Pestrova,…

A:

Q: A researcher wishes to determine whether the blood pressure of vegetarians is, on average, lower…

A: Given Information: Vegetarians: Sample size n1=85 Sample mean x¯1=124.1 Sample standard deviation…

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Q: A new insecticide aboratory test, the mmediately after contact. Is this sufficient evidence to…

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Q: A light-bulb manufacturer advertises that the average life for its light bulbs is 900 hours. A…

A: State the hypotheses. That is, the average life of its light bulbs equals 900 hours. That is, the…

Q: Listed below are brain volumes, in cm³, of a simple random sample of unrelated subjects. Does it…

A: Compute the average and standard deviation of the sample and compute the t-statistics to test…

Q: the city's waste manager is interested in testing to see if the mean amount of garbage per bin is…

A: Given Sample size (n) =36 Sample mean (Xbar) =50.67 Sample standard deviation (s) =3.9 Mean =50