A shop owner claims that on average, his shop has a daily turnover of R55000. Test this claim at the 1% significance level, if the average daily turnover for a sample of 68 days was R57750. Assume a population standard deviation of R3250.

Q: A dpt store has a daily mean sales of $28,372.72. The standard deviation of sales is $2000. On…

A: Given: Daily μ=28372.72σ=2000 On Tuesday x=34885.21

Q: A scrap metal dealer claims that the mean of its cash sales is ‘no more than $80’, although an…

A:

Q: A survey of nonprofit organizations showed that online fundraising has increased in the past year.…

A: Given that Sample size n = 50 Sample mean,M = 29 Sample SD, s = 7 The critical value of t at 90%…

Q: A customer at a specialty coffee shop observed the amount of time, in minutes, that each of 20…

A: Given information: Waiting time of 20 customers (n) to receive order are: X = 3.2, 3.9, 3.7, 2.5,…

Q: In a simple random sample of 46 oral temperatures, the mean was 37.3 degrees Celsius with a standard…

A: It is given that n=46, df=45, x=37.3 and s=1.1. The test isH0:μ=37H1:μ>37

Q: For a sample of 12 items from a normally dis￾tributed population for which the standard deviation is…

A: Provided information is ;  sample size(n) =  12 items  population standard deviation(σ ) =  17.0,…

Q: A. 76% of sunflower seeds will germinate into a flower, and a sample of 800 such sunflower seeds is…

A: Given  n=800, p=0.76  We want to find the mean and standard deviation.

Q: In determining automobile mileage ratings, it was found that the mpg (x) for a certain model is…

A: Given that, Mean = 32 Standard deviation = 1.3

Q: On their website, a property management company states that the mean monthly rent for apartments on…

A: The objective is to state null and alternative hypothesis and find the value of test statistic for…

Q: A company makes self-sealing stem bolts, which are supposed to average 2.00 cm in length. If the…

A: Hey, since there are multiple subparts posted, we will answer the first three subparts. If you want…

Q: If families in a sall local community have anal incomes which are oally distributed with a men of…

A: Answer - A normal distribution  with mean μ = $38500  and standard deviation σ = $4800…

Q: A manufacturer is interested in the output voltage of a power supply used in a PC. Output voltage is…

A:

Q: The CEO of a large financial institution claims that, on average, their clients invest more than R45…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: The CEO of a large financial institution claims that, on average, their clients invest more than…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: The CEO of a large financial institution claims that, on average, their clients invest more than…

A: Given sample details : Sample Mean (Xˉ)(\bar X) = R74 000 Sample Standard Deviation (s)(s) = R7 000…

Q: A simple random sample of 26 filtered 100-mm cigarettes is obtained from a normally distributed…

A: Null and alternative hypotheses: Null hypothesis: H0: σ= 0.25 Alternative hypothesis: H1: σ≠ 0.25…

Q: For a population mean of 50, a sample mean of 52, an estimated standard deviation of 3, and a sample…

A: Given information Population mean µ = 50 Sample size (n) = 20 Mean x̅ = 52 Standard deviation (s) =…

Q: Given a sample mean of 94.3, a sample standard deviation of 8.4 and a sample size of 6, test the…

A:

Q: In a survey of a group of men, the heights in the 20-29 age group were normally distributed, with a…

A: Given: Mean,μ= 67.3Stddeviation,σ= 4.0

Q: A customer at a specialty coffee shop observed the amount of time, in minutes, that each of 20…

A: From the given information. Table of all the values of time in minutes to receive an order.

Q: A Web Usage Snapshot indicated a monthly average of 34 Internet visits of a particular website per…

A:

Q: A customer at a specialty coffee shop observed the amount of time, in minutes, that each of 20…

A: find explanation below

Q: The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine…

A:

Q: In a certain supermarket, a sample of 60 customers who used a self-service checkout lane averaged…

A: Introduction: Assume that the checkout times of the customers are independent of each other, between…

Q: A customer at a specialty coffee shop observed the amount of time, in minutes, that each of 20…

A:

Q: Compute the z-score for X (the target GPA from the Research Question) if the standard deviation of…

A: Given:   Sr. No. GPA 1 2.9 2 2.9 3 3 4 3.1 5 3.1 6 3.1 7 3.15 8 3.15 9 3.2…

Q: A paper filter manufacturer supplies filters of nominal grammage equal to 455 g/m?. A customer…

A:

Q: a survey of 10 fast-food restaurants noted the number of calories in a mid-sized ham results are…

A: From the provided information, Sample size (n) = 10 The observations are 514, 507, 502, 498, 4956,…

Q: Suppose annual salaries for sales associates from a particular store have a bell-shaped distribution…

A:

Q: In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with…

A: The normal distribution is a continuous probability distribution with parameter mean=μ and standard…

Q: A community health plan wishes to estimate the mean number of visits per plan participant in a year.…

A: Given that Margin of Error, E = 2 Population SD = 6.3 Level of confidence = 0.95 The critical value…

Q: In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national…

A: Given information- Sample size, n = 25 Sample mean, M = 62.60 inches Population mean, µ = 63.80…

Q: The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine…

A:

Q: In a random sample of 25 samples of gasoline sold as 87 octane, the mean (R+M)/2 octane rating was…

A: Given: Sample size n= 25 Population average μ=87 Sample mean x¯=87.3 Sample SD s=0.59 α=0.01

Q: years. A survey of companies reported in The Wall Street Journal found a sample mean tenure of x =…

A: (a)   The following null and alternative hypotheses need to be tested: Ho: \muμ ≥ 99 Ha: \muμ <…

Q: Find quartile deviation and its co-efficient from the following data.

A: The quartile deviation is defined as Q.D = (Q3 - Q1)/2 Where Q3 = third quartile and Q1 = first…

Q: The​ quality-control manager at a compact fluorescent light bulb​ (CFL) factory needs to determine…

A:

Q: In Country A, the population mean height for 10-year-old girls is 54.9 inches with a standard…

A: The following information has been provided: The population mean is μ=54.9. The population standard…

Q: the effect size Cohen’s d and what does it tell us about the effect?    Compute the z-statistic.…

A:

Q: For a population with a mean of μ = 75 and a standard deviation of σ = 7, find the z-score…

A: Population mean μ=75, standard deviations σ=7, M=84, n=6

Q: An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees…

A:

Q: The CEO of a large financial institution claims that, on average, their clients invest more than…

A: Null hypothesis:   H0: µ≤150,000   Alternative hypothesis:   Ha:µ>150,000.

Q: The daily demand for six-packs of Coke at Mr. D’sfollows a normal distribution, with a mean of 120…

A: Given: Let X be the number of six packs ordered daily. Given: X is normally distributed. Mean of X =…

Q: An article reported that for a sample of 45 kitchens with gas cooking appliances monitored during a…

A: Confidence Interval - In interval estimation, confidence interval gives amount of error that can be…

Q: A given distribution has a population mean, μ, of 148 and a population standard deviation, σ, of 6.…

A: From the provided information, Mean (µ) = 148 Standard deviation (σ) = 6 X ~N (148, 6)

Q: ey found that the average hotel room rate in State I is RM88.22 and the average room in State II is…

A: Following hypothesis can be created as:   The critical value from standard normal distribution at…

Q: A manufacturer claims that the light bulbs that they produce have a mean lifetime of 1,200 hours and…

A: It is given that, A manufacturer claims that the light bulbs that they produce have a mean lifetime…

Q: The CEO of a large financial institution claims that, on average, their clients invest more than R95…

A: Null Hypothesis: H0: The average invest is not more than 95,000 Alternative Hypothesis: H1: The…

Q: A new formulation of fast disintegrating tablets was designed to have mean dissolution time longer…

A: In case of A, the standard deviation is known to us so we can carry out a simple z-test to test the…

Q: A new formulation of fast disintegrating tablets was designed to have mean dissolution time longer…

A: The hypothesis test is a statistical method in which one using the sample data try to check the…